PHOENIX Messtech 740.0064 Liquid Level Sensor

PHOENIX Messtech 740.0064level sensor

PHOENIX Messtech 740.0064level sensor

1、 Photoelectric liquid level switch

Advantages - Compact, no moving parts, high pressure and high temperature resistance, and can detect very small amounts of liquids.

Disadvantages - Due to the need for sensors to come into contact with liquids and require power, certain viscous substances may remain on the prism, causing false alarms (such as butter).

Application - Container and oil tank level measurement and leak detection application

There are a series of technical terms used to describe this type of liquid level sensing technology. Optical prism, electro-optical, single point optics, optical level switch, etc., the following is a brief introduction by the editor of Gongcai.com to the term photoelectric liquid level switch:

Dry goods | Application and principle of seven commonly used liquid level sensors

The photoelectric liquid level switch contains a light-emitting LED and a phototransistor. When the sensor is in the air, the infrared light inside the sensor will reflect back to the transistor detector. When in a liquid state, infrared liquid will be detected by the sensorRefract it out, thereby reducing the energy reaching this detector. As solid-state devices, these compact switches are highly suitable for various point level sensing applications, especially in situations where reliability is crucial. Optical level switches are suitable for high, low, or medium level detection in almost any large or small tank. They are also suitable for detecting leaks and preventing costly equipment damage.

2、 Capacitive liquid level sensor

Advantages - Solid state, can be non-invasive, compact, and accurate

Disadvantage - may require calibration and can only be used in certain liquids

Application - Tank level monitoring in the chemical, food, water treatment, power, and brewing industries.

The working mode of capacitive liquid level sensors is that the process fluid has a significantly different dielectric constant than air. They measure the capacitance changes between two plates caused by horizontal variations. There are two versions, one suitable for fluids with high dielectric constants and the other suitable for fluids with low dielectric constants.

Dry goods | Application and principle of seven commonly used liquid level sensors

Capacitive liquid level sensors are suitable for various solid, liquid, and mixed materials. They also have contact and non-contact configurations, which means some of them can be connected outside the container/tank. When selecting components, it is important to know that not every capacitive sensor is suitable for all types of materials or slots. In addition, sensors need to be calibrated according to specific materials to avoid differences in dielectric constants and slot designs. Due to the fact that this type of technology is based on contact, the fluid adhering to the probe can seriously affect the reliability of these sensors.

3、 Ultrasonic liquid level sensor

Advantages - No moving parts, compact, reliable, unaffected by medium characteristics

Disadvantages - expensive, invasive, performance may be affected by various elements in the environment

Application - Non contact application with high viscosity and solid particles. Used for systems that require remote monitoring

Dry goods | Application and principle of seven commonly used liquid level sensors

Ultrasonic sensors measure level by calculating the duration and intensity of high-frequency sound waves reflected back from the liquid surface to the sensor - the required time relative to the distance between the sensor and the liquid. The length of time required for sensor reaction is affected by various elements in the atmosphere above the medium, such as turbulence, foam, temperature, etc. Therefore, the installation location is crucial in these devices.

4、 Microwave/Radar Sensor

Advantages - Very accurate, no need for calibration, multiple output options

Disadvantages - expensive price, susceptible to environmental impact, limited detection range

Application - Damp, odorous, and dusty environments. They are also used in systems with temperature changes

Dry goods | Application and principle of seven commonly used liquid level sensors

In principle, radar works in a manner similar to ultrasound, but pulses propagate again at the speed of light; Reliability and repeatability will be affected - but this time it is caused by the dielectric constant of the fluid. However, radar can provide very accurate liquid level information and also compensate for fixed structures inside the container. The disadvantage may be that the initial cost of sensors is relatively high, but some manufacturers are working hard to make this technology more widely accepted by the market. These sensors are among the few technologies that are suitable for foam and viscous substances.

5、 Vibration or tuning fork sensor

Advantages - Compact and cost-effective

Disadvantages - Intrusion, limited usage times

Application - Level control of liquids, powders, and fine solids in the mining, chemical processing, and food and beverage industries.

Dry goods | Application and principle of seven commonly used liquid level sensors

Vibration sensor technology is well suited for solids and level control, including viscous materials and foam, as well as powders and fine solids. However, the types of applications that can use tuning forks are limited to overflow or running dry applications, and they do not provide continuous process measurements. However, it can be used in conjunction with a continuous liquid level detection system as an alarm point for overfilling and leakage.

6、 Conductivity or resistance

Advantages - No moving parts, easy to use, low cost

Disadvantages - Invasive, liquid requires conductivity, probe corrosion

Application - Boiler water, reagent monitoring, tank level measurement for highly corrosive liquids

Dry goods | Application and principle of seven commonly used liquid level sensors

Conductive sensors are used for point level sensing of conductive liquids, such as water and highly corrosive liquids. Simply put, two metal probes of different lengths (one long and one short) are inserted into the can. The long probe transmits low voltage, and the second shorter probe is cut off, so it is at the switching point. When the probe is in a liquid state, current flows through both probes to activate the switch. One advantage of these devices is that they are safe due to their low voltage and current. They are also easy to use and install, but regular maintenance checks must be carried out to ensure that there is no accumulation on the probe, otherwise it will not function properly.

7、 Float switch

Advantages: No power, direct indication, relatively cheap, various outputs

Disadvantages: There must be invasive, moving parts, large size, and a large amount of liquid before the float comes into contact.

Application: Tank level application using water, oil, hydraulic oil, and chemicals.

Dry goods | Application and principle of seven commonly used liquid level sensors

Float switch is one of the most cost-effective yet fully validated technologies in liquid level sensing. The float switch includes a magnet inside the float and a magnetic spring switch contained inside the safety shell. The float moves with the change of liquid and will cause the reed switch to open or close, depending on whether it is in air or liquid. Although the design is simple, this technology provides long-term reliability at an attractive price. The installation method chosen by the user depends on the design and structure of the tank or container where the switch is located. Typically, suppliers will offer a range of installation options, with the most common being horizontal/side installation and vertical installation.

MTS RHM0535MR021A01

IWIS 56649-41224-40020-67498-6528-0

ABB 3HAC022286

R+W BK 5 60/95 24/24 coupling

HYDAC SB30H-50F1/112,A9-210C

Germany imports POSITEK M101-xxx -... - Z000

BADGER METER 1002GBN3LMVXECEP36 1/2 ' RECO CONTROL VALVE TYPE RC250 ( 752 )

KUEBLER 8.9080.4132.3001 Encoder

Phoenix 3200917 plug

Knick P41000D1-0015 isolator

Dunkermotoren SNR 88544 06020+SNR 88711 05202+SNR 88851 01652 Reduction motor

HYDAC 0330D005BH3HC

FIBRO2010.45.2012.2.834.2 Tool spare parts

Tiefenbach WK008L234 magnetic switch

KKS 3081.100.10.000KKS500-3081-10 sealing kit

REXROTH Rexroth DB10-1-52/50

Beckhoff ZS1000-0610 Profibus Bus Connector (Beckhoff)

IGUS SET fixed joint E4.560.46.2.12

PILZ PSSUEF 2DO 2 312215

BAUER BS06-34V/D07LA4; Artikel Nr.: 188H721200 motor with gearbox included

FRONIUS Deutschland GmbH 34.0350.1948 Wire feeding wheel ultrasonic welding FRONIUS Deutschland GmbH 0.878515762

WOERNER Smeersystemen BV VOE-B/6/2-7/7/7/7/7/7/P 分配器

BAUMER 10129333

Dopag 401.09.03 阀

BEIJER E600 24VDC 450mA

Hydac EDS344-3-250-000 pressure sensor

HEINRICHS BGN-S321BU0G0-0-S5E-0-H SER-NR 285685

PARKER P14S-8L1C-2N4-B05-0B0-M2

HYDAC ETS1701-100-000

Beck 930.8622251 pressure testing unit

BLEICHERT K8187.10B.3.10 Link

PMA thermostat KS-9896501001

HYDAC differential pressure switch VM2C.0

Murrelektronik GmbH 56200 Bus Module

SCHUNK SWS-011 15

SIEMENS 6SY7000-0AB66 Fan

Catu E - MO-69430

hydac EDS 710-060-0-035

Eldon EFP 30 filter element

SIEMENS 7ML1118-0CA30 Level Gauge

NORDSON 1087533

Hawe R9.8-7.7-1.45-1.45-1.45 plunger pump

HEIDENHAIN ENCODER ROD1424/1250

Murrelektronik GmbH Nr: 7000-18201-0350150 plug

TRAFAG 9K0.2079 306300-007

PHOENIX MESSTECHNIK GMBH 7400200AHSS Liquid Level Gauge

Hilgendorf 1207522 Hydraulic transmission valve hose nozzle Hydraulic transmission valve hose nozzle Hilgendorf GmbH+Co

Beta C1-P508H-S1N-B1-K1 pressure sensor

KAMAT 7015320 Mechanical Seals

VAHLE EMS bending filling strip 165234

Bowman FG120-3147-3 Heat Exchanger

Hydac HDA 4744-A-250-000 pressure transmitter pressure transmitter sms meer GmbH

hengstlerRI59-O/ 600AQ.7AKB-F0

Turck BI5-EM18-AP6/S907,10-30VDC Nr: 4617425 proximity switch proximity switch Puettmann KG

Turck PS250R-301-LI2UPN8X-H1141 Nr: 6833309 Pressure Sensor

ELECTRONICON E12.K24-410005/29H1318

SERVOMEX Oxygen Analyzer 1900 Explosion proof Order Number 10811

AirCom 1050X 滤芯

SIEMENS 6SE7031-4HE85-1JA0 module module SIEMENS

Wago 750-504 bus module

TR E34-000-070 Absolute Value Encoder

Binks 192392 bearings

HIMMEL K75-M/2-M12K 369968/1

ETA 8345-B02A-U3M0-DB1C-25A-V Circuit Breaker

Kuhnke type: 72.015 \ է;

Hydac EDS3446-3-0400-000 pressure sensor

KUEBLER 8.A02H.1231.1024 Encoder

Balluff BES M12MF1-PSC10F-S04G Displacement Sensor Accessories

Norelem 04620-11 Workpiece Fixture

CAREL - DPPC111000

HAHN+KOLB 76084 704

Turck B2N45H-Q20L60-2LI2-H1151, Nr: 1534013 proximity switch