Rexroth liquid level switch ABZMS-41-2X/0370/D1/DC-K24

Rexroth liquid level switch ABZMS-41-2X/0370/D1/DC-K24Wuhan Baishi Automation Equipment Co., Ltd. is a German manufacturer specializing in the sale of products. The products are photographed in real life and are original from the factory. Customers can buy and use them with peace of mind. Common products in stock supply, welcome new and old customers to inquire and purchase!

Product Description of Rexroth ABZMS-41 Series Liquid Level Switch R901530665 (ABZMS-41-2X/0370/D1/DC-K24)

Preface

In the operation of modern industrial hydraulic systems, fluid transmission equipment, complete hydraulic stations, and large mechanical equipment oil supply systems, stable monitoring and precise control of the oil level in the oil tank are the core basic links to ensure the smooth operation of the entire equipment, extend the service life of hydraulic components, avoid equipment operation failures, and reduce production and operation risks. A low hydraulic oil level can cause a series of problems such as hydraulic pump suction, cavitation, system pressure fluctuations, increased valve wear, and power transmission failure; If the liquid level is too high, it is easy to encounter hidden dangers such as oil overflow, insufficient fuel tank space, decreased heat dissipation efficiency, and pipeline oil leakage. The traditional manual inspection mode has shortcomings such as delayed response, insufficient monitoring accuracy, inability to achieve automated interlocking, and lack of monitoring in night and unmanned scenarios, making it difficult to adapt to the high-precision, high reliability, and automated production control needs of modern industry.

Bosch Rexroth, a global brand in the field of fluid transmission and control, has been deeply involved in the research and development of industrial hydraulic components for decades. With mature manufacturing processes, rigorous design standards, and stable product performance, it has created the ABZMS-41 series floating ball level switch, which is widely used in various industrial hydraulic oil tank level monitoring scenarios. This article focuses on the specialized model ABZMS-41-2X/0370/D1/DC-K24 with material number R901530665. From multiple dimensions including brand background, product basic information, model code analysis, internal structure, working principle, core technical parameters, product performance advantages, material technology, installation and commissioning, application industry scenarios, system adaptation plan, daily maintenance and upkeep, comparison of products in the same series, selection reference value, and industrial application value, a systematic industry website product introduction is conducted to fully present the comprehensive strength and application value of this liquid level switch.

1、 Brand traceability: Bosch Rexroth industrial components heritage

Bosch Rexroth AG, a subsidiary of the Bosch Group, is a global manufacturer in the fields of industrial hydraulics, walking machinery hydraulics, linear motion and assembly technology, and factory automation, with over a hundred years of experience in transmission technology research and development. The brand always adheres to strict industrial manufacturing standards, from raw material selection, structural design optimization, precision machining production, performance testing and verification to finished product delivery. The entire process follows the European industrial quality control system, covering hydraulic pumps, hydraulic valves, oil cylinders, hydraulic accessories, sensing and detection components, system integration accessories and other hydraulic industry chain components in all categories.

In the field of auxiliary detection components for hydraulic systems, Rexroth has developed multiple series of specialized liquid level detection equipment to meet the monitoring needs of oil tank level, oil temperature, and fluid status. Among them, the ABZMS series float ball level switch is a classic and mature model of the brand, specially designed for customized hydraulic station oil tanks, suitable for various industrial fixed hydraulic systems. With stable structure, accurate signal, strong adaptability to working conditions, long service life, standardized electrical interfaces and other characteristics, it has been widely used in many industrial fields such as machine tool manufacturing, metallurgical equipment, engineering machinery, new energy equipment, rubber and plastic machinery, ship hydraulics, mining machinery, etc. It is a specialized supporting component for liquid level safety protection of industrial hydraulic systems and has a stable application reputation and extensive installation base in the global industrial automation supporting market.

2、 Complete analysis of product basic files and model codes

2.1 Basic Product Information

Product Name: Rexroth Floating Ball Liquid Level Switch

Original material number (order number): R901530665

Complete model: ABZMS-41-2X/0370/D1/DC-K24

Product series: Rexroth ABZMS-41 series standard liquid level detection switch

Product type: Magnetic coupling floating ball level control switch (for hydraulic oil tanks)

Product attributes: Original industrial hydraulic accessories, oil tank level monitoring and interlocking control components, non explosion proof conventional industrial environment specific devices, suitable for mineral hydraulic oil medium detection scenarios.

2.2 Detailed interpretation of model segmentation coding

Each character of the complete model corresponds to the product structure, size, contact configuration, electrical specifications, and version attributes. It is the core basis for industrial procurement, selection, replacement, and equipment matching. The disassembly of each character is as follows:

ABZMS: Product Category Code

ABZ is the exclusive prefix for Rexroth hydraulic measuring equipment, and M represents the category of floating ball level switches, distinguishing other accessories such as level gauges, temperature sensors, and combination detection components, and clarifying the basic category attributes of the product.

41: Product series version number

Representing the 41st generation of ABZMS basic structure models, this series is the brand's universal standard version float switch, with unified installation dimensions, conduit structure, and electrical interface specifications. The internal magnetic spring contact structure has been optimized for multiple generations, with strong structural universality, and can adapt to most conventional hydraulic oil tank top installation dimensions, compatible with multiple specifications of oil tank internal space layout.

2X: Product Structure Version and Contact Specification Sequence

Belonging to the second generation structural upgrade version in the range of 20-29, it represents the optimization design of the internal switch contact architecture, mechanical structure sealing technology, and floating component structure of the equipment. Compared with the first generation model, the sealing performance, resistance to oil impurities interference, and contact switching stability have been comprehensively improved. At the same time, the fixed foundation installation interface size has been standardized and adapted to the industry's common installation hole specifications.

0370: Core mechanical length parameters

The effective total length of the detection rod (sliding tube) representing the main body of the liquid level switch is 370mm, which is the core dimension parameter of this model, directly determining the depth of the adapted oil tank and the range of liquid level monitoring. It is only suitable for hydraulic oil tanks with internal depth matching. The detection rod extends vertically into the interior of the oil tank, covering the entire range of liquid level fluctuation. The 370mm length belongs to the mainstream adaptation size of small and medium-sized hydraulic stations and compact equipment oil tanks, and is suitable for most machine tool hydraulic stations and small complete hydraulic system oil tanks.

D1: Internal Function Module Configuration Code

This model belongs to the D series functional configuration version, which is different from the M series multi contact, RTA series analog output, and display module models. The D1 configuration of this model is a dedicated liquid level switch basic functional architecture, integrating stable liquid level signal on/off output, without additional temperature integrated contacts or continuous analog signal output, focusing on single precise liquid level point monitoring and switch signal feedback. The functional architecture is streamlined, the circuit design is simple, the operating failure rate is lower, the signal transmission is more stable, and it is suitable for conventional working conditions that only require basic liquid level high and low level interlocking and alarm control.

DC-K24: Electrical Power Supply and Interface Specifications

DC represents direct current power supply, without AC power supply adaptation; K24 represents a rated working power supply voltage of DC24V, which is a universal standard power supply voltage for industrial automation equipment, PLC control systems, and hydraulic station electrical control cabinets. It has electrical compatibility and can be directly connected to conventional DC control circuits in industrial sites without the need for additional voltage conversion modules. It is easy to connect wiring and is suitable for the signal docking needs of most industrial equipment electrical control systems.

3、 Internal structure composition and precision design

The Rexroth ABZMS-41-2X/0370/D1/DC-K24 liquid level switch adopts a top mounted vertical column structure, which is divided into six core parts: top electrical terminal, top mounting flange, central metal detection slide tube, built-in magnetic spring induction component, floating ball component, and bottom limit structure. The mechanical design of the entire structure is compact, with no excess exposed vulnerable parts, and is suitable for long-term operation in a sealed oil contaminated environment inside the fuel tank.

Top electrical connection end

Adopting an industrial standard 4-pole enclosed plug-in interface, the protective structure is complete, and a dedicated wiring plug is used to achieve bidirectional electrical connection between power access and switch signal output. The interface is insulated and sealed to isolate external dust, moisture, and on-site oil contamination from entering the circuit, avoiding circuit short circuits and signal interference problems. The wiring layout is neat, in accordance with industrial equipment wiring specifications, easy to disassemble, and convenient for on-site equipment maintenance and replacement.

Install flange components

The top of the equipment is equipped with an integrated casting installation flange with standard installation fixing holes. It is fixed directly to the top of the hydraulic oil tank with reserved installation holes using bolt fastening installation method. The flange contact surface is matched with a special oil resistant sealing gasket to achieve sealing of the installation position at the top of the oil tank, preventing hydraulic oil from leaking through installation gaps and external air impurities from entering the interior of the oil tank. At the same time, it ensures that the overall vertical installation of the equipment is stable, and there are no shaking or offset problems during operation, ensuring accurate vertical floating trajectory of the floating ball.

Center detection slide tube

The main body is a 370mm long metal sliding tube with standardized diameter. The tube material is made of high-strength oil resistant alloy, and the surface is treated with anti-corrosion and oil oxidation resistance. Long term immersion in hydraulic oil will not cause problems such as wall corrosion, material aging, deformation and bending; The sliding tube is hollow inside and contains a fixed arrangement of magnetic spring switch contact components, which are fully enclosed within the sealed tube body and do not directly contact hydraulic oil. This structure prevents oil impurities from adhering to the contacts and corroding the sensing elements, greatly improving the service life of internal electrical components.

Built in magnetic spring sensing contact

D1 is equipped with a dedicated sensing structure, designed based on the principle of magnetic reed switch (reed switch) induction. The internal contacts are sealed passive mechanical sensing contacts, which rely on magnetic field changes to achieve on-off switching. There are no internal active circuit heating elements, low power consumption, and strong anti-interference ability. The contact points are precisely calibrated at the factory, corresponding to exclusive liquid level switching points. The signal triggering threshold is stable, and there will be no false triggering, frequent jumping, signal lag, or other phenomena, meeting the signal accuracy requirements of industrial equipment safety interlocking.

Floating ball component

A special sealed floating ball set on the external sliding tube, with permanent magnets embedded inside. The floating ball is made of mineral oil resistant, aging resistant, and deformation resistant polymer sealing material, and its density is precisely calculated to adapt to the buoyancy characteristics of conventional industrial hydraulic oil. It slides vertically and freely up and down along the metal sliding tube with the rise and fall of the hydraulic oil level inside the oil tank, and floats smoothly without any jamming, sticking, or adhesion problems; The floating ball is fully sealed and isolated, and the internal magnet does not come into contact with the oil, avoiding magnetic attenuation and impurity adhesion that may affect the induction accuracy.

Bottom limit structure

A fixed limit block is set at the bottom of the detection rod to limit the sliding stroke of the float and prevent it from slipping off the sliding tube. At the same time, a complete liquid level monitoring range boundary is defined, corresponding to an effective floating range of 370mm in total length, covering all ranges of the normal working liquid level, low liquid level warning, and high liquid level warning of the fuel tank, with structural protection *.

4、 Detailed explanation of working principle: Magnetic coupling floating ball induction technology

This liquid level switch is based on the dual technology combination of Archimedes' buoyancy principle and magnetic coupling non-contact induction principle. It is a mature, stable and widely used liquid level detection technology solution in the industrial hydraulic field. There is no direct electrical contact measurement throughout the process, and the mechanical structure operation loss is extremely low. The working process logic is clear and complete:

The hydraulic oil tank stores mineral hydraulic oil inside, and the equipment is installed vertically on the top of the tank. The metal detection rod and floating ball are inserted into the oil as a whole. The floating ball relies on the buoyancy of the oil itself and moves vertically up and down along the central sliding tube as the oil level in the tank changes. The permanent magnet embedded inside the floating ball will move synchronously with the floating ball, forming a moving magnetic field source.

When the fuel tank level rises, the float floats upwards, and the internal permanent magnet gradually approaches the magnetic spring induction contact at the pre calibrated position inside the sliding tube; When the displacement of the floating ball reaches the preset liquid level critical point and the magnetic field strength reaches the triggering threshold, the internal contacts of the magnetic spring switch are subjected to magnetic force to achieve attraction/disconnection switching, and output corresponding switch electrical signals; When the liquid level in the fuel tank drops, the float ball falls down with the oil surface, and the permanent magnet moves away from the sensing contact. The magnetic field force dissipates, and the internal contact automatically resets, restoring the initial on-off state and completing a complete signal cycle.

Different from electrode type, ultrasonic, and capacitive liquid level detection devices, this Rexroth liquid level switch adopts a non-contact magnetic coupling triggering structure. The floating ball has no mechanical direct contact friction with the internal contacts, and only relies on magnetic field to transmit signals, reducing mechanical wear from the root; The D1 simplified version of the circuit architecture has no complex electronic components and relies solely on magnetic induction to achieve signal conversion. The circuit structure is simple, and the on-site electromagnetic environment has excellent anti-interference ability. It is not affected by hydraulic oil turbidity, oil impurity particles, dielectric constant of the medium, or on-site electromagnetic interference, and only responds to real changes in liquid level height. The signal feedback is real and reliable, and it is suitable for long-term monitoring needs of complex oil environments inside hydraulic systems.

At the same time, the contact switching has the characteristic of maintaining the state. Within the range where the floating ball has not crossed the critical point, the contact state remains stable, and there will be no frequent false signal jumping due to slight fluctuations in oil or liquid level shaking. It effectively filters out liquid level disturbances and interference, ensuring stable signal reception by the back-end PLC, electrical control cabinet, alarm device, and control components, and avoiding production abnormalities such as equipment shutdown, false alarm, and false interlocking.

5、 Complete core technical parameters (original factory standard parameters)

Based on the Rexroth product manual, component factory testing data, and general specifications of the same series of models, we have compiled the * * R901530665 (ABZMS-41-2X/0370/D1/DC-K24) * * comprehensive and accurate technical parameters. All parameters are original factory calibration standards, without exaggerated descriptions, and are compatible with industry website parameter display specifications:

5.1 Basic mechanical parameters

Material Order Number: R901530665

Complete model: ABZMS-41-2X/0370/D1/DC-K24

Product type: Vertical installation floating ball level switch

Effective length of detection rod: 370mm

滑管外径： 20mm

Installation method: Vertical flange installation at the top of the fuel tank

Allowable deviation for installation inclination angle: ± 10 ° (Exceeding the inclination angle will affect the smoothness of the floating ball, and it is recommended to strictly install vertically at the factory)

Bare weight of the whole machine: 0.36kg

Sealing structure: oil resistant seal on the flange surface+fully sealed structure on the pipe body

5.2 Medium and Environmental Operating Parameters

Suitable for the tested medium: Conventional industrial mineral based hydraulic oil (equipment is not suitable for flammable and explosive fluids, highly corrosive chemical liquids, high emulsion oil containing water, and fluids containing a large amount of hard particle impurities)

Suitable medium working temperature range: -20 ℃~+70 ℃

Operating temperature of the surrounding environment of the device: -20 ℃~+85 ℃

Working process medium pressure resistance: Under normal pressure oil tank conditions, the maximum pressure resistance is 1 bar

Applicable scenarios: Conventional non explosion proof industrial indoor and workshop equipment hydraulic systems, not suitable for use in flammable and explosive explosion-proof hazardous areas

5.3 Electrical system parameters

Power supply: DC

Rated working voltage: DC24V (K24 standard specification)

Electrical interface: 4-core M12 standard plug-in interface

Contact type: D1 configuration dedicated basic liquid level magnetic spring switch contact

Signal output: Passive switch on/off signal (dry contact signal)

Circuit protection: electrical module moisture-proof, oil proof, and short-circuit protection design

Protection level: The electrical protection of the entire machine shell is IP65, which can effectively prevent dust, splashing oil, and humid water vapor from entering the internal electrical chamber of the equipment in industrial sites

5.4 Performance Operating Parameters

Induction principle: magnetic coupling non-contact floating ball induction

Liquid level triggering method: fixed-point threshold triggering, state holding signal output

Floating response characteristics: Real time tracking with liquid level without significant lag

Contact switching life: high cycle mechanical service life, meeting the continuous operation needs of industry all year round

Structural characteristics: The internal contacts are fully sealed and isolated, and do not come into contact with the tested oil

Function configuration: Pure liquid level monitoring and control, no integrated temperature detection, no 4-20mA analog continuous output, no on-site display module (D1 exclusive simplified configuration)

6、 Product core advantages and exquisite quality highlights

Based on the design of the model structure, material technology, working condition adaptation, electrical performance, and operation and maintenance attributes, compared with the commonly used ordinary liquid level switch in the market and other brands of similar float switches, the Rexroth R901530665 liquid level switch has multidimensional comprehensive advantages, which meet the core requirements of long-term stable operation of industrial hydraulic systems. The advantages are as follows:

6.1 Original factory precision structure, excellent sealing performance, strong oil resistance and durability

As a customized model from the original factory of Lishile, the entire structure adopts the brand's mature sealing technology. The top flange installation surface has a multi-layer oil resistant sealing structure, the detection tube body is fully sealed, and the top electrical interface is sealed and protected with a triple sealing design. It is immersed in hydraulic oil environment for a long time without oil leakage, internal cavity oil ingress, or water vapor intrusion problems. The whole machine's wetted materials have passed the oil compatibility verification, and are suitable for various conventional hydraulic oils. The pipe wall has no corrosion, aging, cracking, and the float has no material swelling deformation after long-term use. Compared with the ordinary domestic simple float switch, the material has a significant gap in anti-aging and oil corrosion resistance, which can adapt to the continuous operation condition of industrial equipment throughout the year, and the natural service life of the equipment is longer.

6.2 Magnetic coupling non-contact design, stable operation without lagging, precise signal with low error

The core adopts a non-contact magnetic induction triggering structure, and the floating ball only performs sliding and floating actions without direct mechanical friction contact with the internal induction contacts, eliminating the problems of traditional mechanical switch contact wear, jamming, poor contact, and life decay from the root. At the same time, the internal magnetic spring contacts have undergone precise point calibration before leaving the factory, combined with liquid level fluctuation anti shake design. The signal is only triggered when the real liquid level reaches the set critical point, filtering out small liquid level shaking interference caused by pump operation and oil flow in the oil tank. There will be no false signals, frequent on-off jumps, signal delays and other problems. The switch output is precise and stable, and it is connected to the safety interlock control of backend equipment to ensure the accuracy of system liquid level control.

6.3 D1 Simplified functional architecture, simple and reliable circuit, wide adaptability, low failure rate

This model has exclusive D1 function configuration, eliminating redundant additional modules and focusing on basic liquid level switch signal output. The internal circuit architecture is minimalist, without redundant electronic components, and has stronger on-site electrical interference tolerance. The DC 24V standard power supply is directly compatible with industrial PLC control systems, hydraulic station electrical control circuits, relay control modules, and sound and light alarm devices, without the need for additional signal conversion and amplification equipment. The on-site wiring is simple and fast. Simplify the circuit structure while significantly reducing the probability of electrical failures, minimizing the risk of component damage, and eliminating the need for frequent maintenance and debugging during daily operation, adapting to the high stability requirements of industrial sites.

6.4 Accurate and standardized size, easy installation, and strong universality for replacement

370mm fixed detection rod length, standard top flange installation size, 4-core standard electrical interface, all comply with the unified structural specifications of the Rexroth ABZMS-41 series, and also conform to the common installation hole size of hydraulic oil tanks in the industry. On site installation of the equipment only requires reserving standard installation holes on the top of the fuel tank, tightening bolts to complete mechanical installation, and connecting to standard 24V DC lines to complete electrical wiring; At the same time, models of the same series and size can be directly exchanged and replaced, making equipment maintenance, parts replacement, and upgrading and replacing old components convenient. There is no need to modify the fuel tank structure or adjust the layout of the electrical control circuit, greatly reducing equipment renovation construction costs and labor hours.

6.5 Wide temperature operation under all working conditions, excellent environmental adaptability

The device supports a wide temperature range of -20 ℃ to 70 ℃ for medium temperature and -20 ℃ to 85 ℃ for ambient temperature. It can adapt to multi temperature environments such as low-temperature workshops in winter and high-temperature equipment rooms in summer in northern China, as well as oil temperature rise during equipment operation. There are no issues of floating ball solidification or slow contact response in low-temperature environments, and no material aging, circuit performance degradation, or magnetic failure in high-temperature environments. It is not affected by temperature fluctuations in all seasons and operates stably 24/7. At the same time, it has a high protection level of IP65, which can resist complex industrial site environments such as workshop dust, oil splashes, and humid air, and is suitable for the installation environment of various conventional industrial equipment in workshops.

6.6 Brand original factory quality, traceable, supporting system*

This product has an exclusive material number R901530665, with a complete model code corresponding to the original production batch and factory inspection file. The entire process is authentic and traceable, and all components are precision processed and produced by the original factory of Lishle, not imitation modified parts. At the same time, relying on the brand's global supply chain system, with complete supporting technical information and after-sales technical support, it is suitable for various procurement and use scenarios such as original equipment matching, equipment maintenance and spare parts replacement, project engineering batch procurement, system integration matching, etc., with compatibility between installation and original equipment matching.

7、 Installation specifications, debugging points, and wiring instructions

7.1 Installation environment and location requirements

Installation position: Only used for vertical installation at the top of the hydraulic oil tank. The equipment extends vertically into the interior of the oil tank, and the installation inclination angle is strictly controlled within ± 10 °. It is forbidden to install horizontally or at large angles to avoid obstruction of the float sliding.

Oil tank adaptation: Suitable for a pressure sealed hydraulic oil tank with an internal depth matching 370mm detection rod length. Priority should be given to selecting a stable liquid level area in the tank, away from the hydraulic pump suction and return ports, to avoid severe shaking of the liquid level caused by return oil impact and reduce signal interference.

Medium restriction: Can only be used for conventional mineral hydraulic oil, and is prohibited from being installed in fluid containers containing corrosive liquids, flammable and combustible oil products, high water content emulsified oil, and large amounts of metal particle impurities; The equipment does not belong to explosion-proof components and is strictly prohibited from being used in areas with explosion-proof hazardous conditions.

7.2 Mechanical installation steps

Confirm in advance the size of the reserved installation opening on the top of the fuel tank, match the installation specifications of the equipment flange, clean the oil stains, impurities, and protruding foreign objects on the installation surface, and ensure that the installation surface is flat.

Install original factory specific oil resistant sealing gaskets on the flange sealing contact surface to ensure a tight seal after installation and prevent oil leakage.

Place the liquid level switch vertically into the oil tank from top to bottom, extend the detection rod into the oil range, and keep the float within the effective floating stroke.

Use matching fixing bolts to tighten the installation flange, evenly lock the bolts, ensure that the equipment is firmly fixed without looseness, and confirm that the overall vertical center is free of offset and skewness.

7.3 Electrical wiring specifications

Power supply specifications: Strictly connect to DC24V DC power supply, strictly prohibit connecting to AC power supply or high-voltage DC power supply to prevent internal circuit burning and damage.

Interface specification: The device adopts a 4-core standard plug-in interface at the top, which is connected to the power line and switch signal line according to the original wiring definition. After the wiring is completed, the interface lock is locked to ensure a stable electrical connection. At the same time, line protection is taken to avoid damage to the interface caused by line pulling.

Backend docking: The switch dry contact signal can be directly docked with PLC signal acquisition module, intermediate relay, sound and light alarm, oil pump control circuit, system interlocking protection device, to achieve control logic construction such as low level shutdown, low level warning, high level alarm, and high level protection.

Wiring protection: On site wiring should be kept away from high-power power cables and high-frequency interference lines to reduce electromagnetic signal interference and ensure stable signal transmission; After the wiring is completed, check the insulation of the circuit to prevent short circuits, virtual connections, and missing connections.

7.4 Key points of factory debugging

The internal contact point calibration has been completed before the equipment leaves the factory, and only simple verification is required after on-site installation:

No load verification: Without adding oil, confirm that the initial contact state of the equipment is normal and there are no abnormal signal outputs.

Liquid level rise and fall verification: Slowly add hydraulic oil and observe whether the contacts switch normally and whether the signal feedback from the backend equipment is timely when the liquid level rises to the critical point; Drain the oil and lower the liquid level, observe whether the contacts automatically reset and the signal returns to its initial state.

Stability verification: Simulate the normal operation of the equipment with slight fluctuations in oil level, confirm that there are no frequent false signal triggers, and only accurately trigger the fixed-point liquid level. After debugging, it can be put into normal operation.

8、 Wide range of industrial application fields and scenario segmentation

The Rexroth ABZMS-41-2X/0370/D1/DC-K24 liquid level switch, with its size adaptability, stability performance, standard electrical compatibility, and simplified and reliable functional design, focuses on industrial hydraulic system matching and deeply adapts to various fixed hydraulic stations and small and medium-sized hydraulic equipment in multiple industries, covering the entire industry chain of equipment manufacturing. The specific application areas are subdivided as follows:

8.1 Metal cutting machine tool industry

Various types of CNC lathes, machining centers, CNC grinders, milling machines, drilling machines and other machine tools are equipped with hydraulic stations. The hydraulic system of the machine tool is used for fixture clamping, worktable feed, spindle locking, and tool magazine tool changing power drive. This 370mm length model is suitable for small and medium-sized oil tanks in machine tools, with real-time monitoring of hydraulic oil levels. If the liquid level is too low, it will trigger warnings and interlock protection in a timely manner to prevent hydraulic pump wear and tear due to oil shortage, hydraulic power failure of the machine tool, and safety hazards such as fixture loosening. It ensures the continuous precision machining operation of the machine tool and is a commonly used special accessory for original machine tool matching and maintenance replacement.

8.2 Rubber and Plastic Machinery Equipment Industry

Injection molding machines, extruders, rubber molding machines, die-casting machines, and other equipment are all equipped with independent hydraulic power systems to complete mold clamping, locking, injection molding, and material extrusion actions. The oil tank space of the equipment is compact, suitable for the detection size of this model, and the oil level is stabilized through liquid level monitoring to avoid unstable system pressure, poor precision of formed products, and damage to hydraulic components caused by abnormal oil level. At the same time, it is suitable for the normal continuous production conditions of the equipment workshop, and can operate stably for a long time without frequent maintenance.

8.3 Metallurgical General Equipment Industry

Metallurgical auxiliary equipment, hydraulic transmission and conveying equipment, rolling mill auxiliary hydraulic station, roller drive hydraulic system, equipment operating environment temperature is high and there is a lot of dust on site. This product has IP65 protection, wide temperature operation, anti oil pollution and dust prevention characteristics suitable for this working condition, accurately controls the oil tank liquid level, ensures the power stability of metallurgical auxiliary hydraulic system, and avoids the operation failure of the entire transmission equipment caused by abnormal liquid level.

8.4 New Energy Supporting Equipment Industry

New energy equipment is equipped with hydraulic stations, photovoltaic equipment hydraulic auxiliary systems, and lithium battery production equipment hydraulic transmission units. These types of equipment require high stability in automation control, and all electronic control systems use DC24V standard control circuits. The electrical interface of this model is compatible, and the simplified and stable liquid level signal can be directly connected to the equipment's automatic control system to achieve automatic liquid level monitoring and safety interlocking under unmanned conditions, adapting to the continuous production needs of new energy production lines.

8.5 General industrial complete hydraulic station

Customized small and medium-sized independent hydraulic stations and hydraulic power units for various industries, including hydraulic stations for automated production lines, hydraulic systems for material handling equipment, and power units for hydraulic lifting platforms. The depth of this type of fuel tank is uniformly adapted to a detection length of 370mm, and the equipment can be directly used as a standard liquid level safety protection element for hydraulic stations. A complete liquid level safety control system is established to achieve low-level protection, abnormal alarm, and overall safe operation architecture of the hydraulic station.

8.6 Other General Industrial Equipment

Including fixed hydraulic units for small construction machinery, hydraulic systems for textile machinery, hydraulic stations for printing and packaging equipment, laboratory precision hydraulic testing equipment, etc. All equipment that uses atmospheric mineral oil hydraulic oil tanks, DC24V electronic control systems, and small and medium-sized oil tank size adaptability can use this Rexroth level switch as a level detection and control component.

9、 Daily maintenance and service life management

The long-term stable operation of industrial components cannot be achieved without standardized daily operation and maintenance. Based on the structural characteristics of the product and the usage environment of the hydraulic oil tank, a simple and practical daily maintenance plan is developed to extend the service life of the equipment and maintain signal stability and accuracy without the need for complex operation and maintenance processes

routine inspection

After the equipment is put into operation, combined with the overall inspection cycle of the equipment, regularly check whether the installation flange is loose and whether there is oil leakage on the sealing surface; Check the top electrical interface circuit for damage, looseness, and oil accumulation; Observing whether the backend signal feedback is normal, whether there are any abnormal alarms or signal jumps, and conducting basic appearance and line inspections can identify the vast majority of external hazards.

Regular inspection of internal status

Combine the hydraulic oil change cycle and synchronously check the operating status of the liquid level switch. During the oil tank replacement and cleaning period, observe whether the floating ball slides smoothly, whether there is any jamming or adhesion, and whether there is a large amount of oil sludge and impurities adhering to the surface; If there is oil accumulation on the surface of the floating ball, use a specialized hydraulic oil cleaner to gently wipe and clean it. Do not scrape the surface of the floating ball with hard objects to avoid material damage and magnetic component damage.

Oil environment control

Keep the hydraulic oil in the tank clean, regularly filter impurities in the oil, reduce the accumulation of metal debris and gum impurities, and prevent impurities from adhering to the sliding tube and affecting the sliding of the float; Strictly control the working temperature of the oil within the equipment adaptation range to avoid accelerated aging of component materials due to long-term operation at ultra-high temperatures; It is prohibited to replace unconventional medium oil products at will to prevent swelling and corrosion of floating balls and pipe materials.

Electrical system maintenance

Regularly check the stability of the power supply voltage, always maintain a stable DC power supply of DC24V, and avoid voltage fluctuations from impacting the internal circuit; Electrical interfaces should be kept dry and clean, with timely cleaning of interface dust and oil stains. Do not modify circuits or connect non compatible loads without authorization to ensure electrical circuit safety.

Storage and spare parts storage

Uninstalled spare components need to be sealed and stored in a dry, cool, non corrosive gas, and non strong magnetic field interference environment to avoid long-term exposure to sunlight, high temperature and humidity storage that may cause component aging; Spare parts should be stored in their original factory packaging, with clear identification of model and material numbers for easy replacement and retrieval during subsequent maintenance.

Service life description

On the premise of standardized installation, compliant use, regular basic maintenance, and medium conditions meeting parameter requirements, the mechanical structure and electrical induction components of this original factory level switch can achieve continuous and stable service all year round, far superior to ordinary similar level switch products; Only in cases of severe mechanical damage, internal magnetic component failure, electrical circuit burnout, etc., can the entire original factory parts be replaced.

10、 Comparison and selection advantages analysis of products in the same series

The Rexroth ABZMS-41 series has multiple segmented models, covering different lengths, contact configurations, functional modules, and output types. This R901530665 (ABZMS-41-2X/0370/D1/DC-K24) is a simplified basic model dedicated to the series. Compared horizontally with the mainstream models in the series, it clearly highlights the product's selection positioning and adaptation advantages:

Compared to large-sized models (such as 0500mm, 0800mm, 1000mm length models): This 370mm short probe rod size is specifically designed to fit small and medium-sized compact fuel tanks. The device has a moderate extension length and does not interfere with the internal structure of the fuel tank, as well as the layout of pipelines, filter elements, and cooling components inside the tank. It is an exclusive adapter for small hydraulic stations and machine tool fuel tanks, and large-sized models cannot adapt to narrow fuel tank spaces.

Comparing the multi contact M series models (M1/M2/M4 multi contact models): The M series supports multi gear liquid level point positions, normally open and normally closed multi contact switching, and some have temperature integrated contacts, with rich functions but complex circuit structures; This D1 simplified configuration only retains the basic precise liquid level single point signal, without redundant functions. The circuit is simpler, the failure rate is lower, and the signal is purer. It is suitable for conventional working conditions that only require basic liquid level safety interlocking, multi gear control, and temperature monitoring. It has a higher cost-effectiveness and more stable daily operation.

Compared to RTA/D series models with analog and display capabilities, the model integrates 4-20mA continuous liquid level analog output, oil temperature detection, and on-site numerical display modules, making it suitable for large and complex systems that require continuous liquid level data acquisition, remote monitoring, and multi parameter comprehensive monitoring; This product focuses on switch quantity fixed-point control, with no additional module costs. The procurement cost is more in line with conventional matching needs, and the electrical connection is simple, meeting the essential needs of most basic industrial liquid level protection without redundant functions or waste.

Compared to the first generation 1X series models, this 2X structure upgrade version has been fully optimized in terms of sealing technology, structural strength, anti-interference ability, and contact durability. Its installation versatility and structural stability have been comprehensively improved, making it the second generation mature optimized standard version model in the series.

Conclusion of comprehensive selection: The R901530665 model is a suitable choice for small and medium-sized hydraulic oil tanks, with only basic liquid level fixed-point switch control, DC24V standard electronic control, pursuit of high stability and low faults, and no need for additional temperature/analog output. It takes into account multiple advantages such as original factory quality, precise size, stable performance, procurement adaptability, and convenient operation and maintenance.

11、 Summary of Comprehensive Value of Industrial Applications

In the overall architecture of modern industrial automation hydraulic systems, the liquid level switch may seem like a small auxiliary detection component, but it is a key link in the safety protection loop of the entire system. Lishile original material number R901530665, model ABZMS-41-2X/0370/D1/DC-K24 liquid level switch, relying on Bosch Lishile's century old transmission technology, mature ABZMS-41 series platform design, precision magnetic coupling float technology, and strict original manufacturing standards, meets all core requirements for liquid level control of small and medium-sized industrial hydraulic systems from product structure, material technology, signal accuracy, working condition adaptation, electrical compatibility, service life, installation and operation in all dimensions.

From the perspective of equipment operation safety, this product accurately outputs fixed-point liquid level signals, effectively avoiding various common hydraulic system failures such as cavitation of hydraulic pumps, excessive wear of components, abnormal system power, and oil overflow and leakage. It reduces the risk of equipment failure shutdown from the source, minimizes sudden maintenance losses, and ensures the smooth and continuous operation of the entire hydraulic equipment; From the perspective of automation adaptation, DC24V standard DC power supply, standard switch quantity dry contact signal, seamless integration with industrial PLC automatic control system and electric interlocking circuit, help equipment achieve unmanned automatic monitoring, automatic warning, and automatic protection, in line with the trend of modern industrial automation simplification and high efficiency development; From the perspective of supporting procurement, the original material number, precise model parameters, standardized size structure, adaptability to the original factory's complete machine matching, equipment maintenance spare parts replacement, batch integrated procurement of engineering projects, genuine traceability guarantee *, easy installation and replacement without changing the equipment structure; From the perspective of long-term operation and maintenance, the non-contact low wear structure, wide temperature and high protection working condition adaptation, streamlined low fault circuits, and simple daily maintenance plan significantly reduce the later operation and maintenance costs and maintenance workload, with outstanding long-term comprehensive use value.

This model accurately targets the small and medium-sized compact fuel tank foundation liquid level control sub market, with mature and stable product performance, reliable precision quality from the original factory, and practical design that fits the industrial site, filling the high reliability liquid level detection matching needs under conventional working conditions. It is the preferred original component for hydraulic system liquid level safety protection in industries such as machine tools, rubber and plastic, general hydraulic stations, and automation equipment. It continues to provide basic and reliable liquid level monitoring guarantee for the stable operation of industrial equipment in various fields, fully demonstrating the performance and application value of hydraulic accessories.

The content of this article is based on publicly available products and network data. Please refer to the technical manual for actual selection and consider specific operating parameters.

Rexroth liquid level switch ABZMS-41-2X/0370/D1/DC-K24