Vibration temperature liquid level three parameter combination probe

KR939SB3Vibration temperature liquid level three parameter combination probeIntroduction

KR939SB3Vibration temperature liquid level three parameter combination probeFeatures:

In the field of industrial equipment operation monitoring, ensuring stable and efficient operation of equipment has always been of paramount importance. Recently, a three parameter combination probe called KR939SB3 has made a strong debut, bringing a new solution for industrial equipment condition monitoring with its innovative design and performance, and is expected to become a powerful assistant in many industrial scenarios.

1、 Function integration, multi parameter synchronous monitoring

The KR939SB3 three parameter combination probe is designed specifically for monitoring the safe operation of industrial equipment, with high integration being its biggest highlight. It integrates the measurement functions of three key parameters: oil temperature, oil level, and vibration, and carefully integrates corresponding signal sensing, conversion, and transmission circuits internally. In the operation monitoring of the cooling tower fan gearbox, it is possible to accurately obtain the lubricating oil temperature, lubricating oil level, and box vibration signals simultaneously, and quickly convert these signals into 4-20mA standard current signals for output. This feature makes it easy to seamlessly integrate with various general-purpose secondary instruments, such as common digital displays or excellent computer data acquisition and control systems (DCS, PLC, etc.), to achieve real-time and comprehensive monitoring of equipment operation status, greatly improving monitoring efficiency and avoiding the tedious installation and maintenance work caused by the use of multiple independent probes.

2、 Accurate measurement and stable technical support

1. Oil temperature measurement: Platinum resistance sensors combined with semiconductor integrated devices are used. Platinum resistors are extremely sensitive to temperature changes, and their resistance values change precisely with the oil temperature. Semiconductor integrated devices are responsible for converting resistance changes into electrical signals, amplifying and processing them, and ultimately outputting accurate oil temperature signals. Its measurement range is 0-100 ℃, and the comprehensive error is strictly controlled within ± 1 ℃. In industrial environments with high temperature or temperature fluctuations, it can provide reliable data for equipment oil temperature monitoring.

2. Oil level measurement: using the principle of capacitive sensing. When the probe rod is inserted into the lubricating oil of the gearbox, the capacitance of the probe will change due to the difference in dielectric constant between the lubricating oil and the surrounding air. When the oil level changes, the capacitance value will also change accordingly. By accurately measuring and converting the capacitance value, a 4-20mA standard current signal corresponding to the oil level is obtained. The oil level measurement range is -10-40mm (0mm is the lower limit position of the normal oil level of the gearbox), and the comprehensive measurement error is only ± 5mm, ensuring accurate control of the lubricating oil level. However, it should be noted that the measured medium must be non-conductive to ensure measurement accuracy.

3. Vibration measurement: The vibration measurement sensor directly obtains the acceleration signal of mechanical vibration, and then the signal is sequentially amplified by an amplifier to enhance the signal strength; The bandpass filter filters out effective vibration signals within the frequency range of 10-1000Hz and removes noise interference; Convert the acceleration signal into a vibration velocity signal through another integration operation; Finally, the vibration waveform within the effective bandwidth is converted into true effective value (RMS) using a RMS converter, and a 4-20mA current signal proportional to the RMS of the vibration velocity is output. The vibration measurement range is 0-20mm/s, with a comprehensive error of ± 1mm/s. It can sensitively capture equipment vibration abnormalities and provide key basis for equipment fault warning.

3、 Exquisite structure, adaptable to complex environments

From the perspective of appearance and structure, the KR939SB3 three parameter combination probe adopts a stainless steel fully enclosed waterproof structure, with a total weight of about 0.6kg, which is sturdy and durable. The external thread form is installed in the threaded installation hole of the fan gearbox or other tested equipment, and the probe can be inserted into the gearbox to obtain the corresponding signal and complete the transmission output. This design is not only easy to install, but also has good sealing and seismic resistance, as well as a certain degree of explosion-proof capability. It can still work stably in harsh industrial environments such as high temperature, high humidity, and strong vibration in chemical and metallurgical industries, ensuring the smooth progress of long-term online monitoring tasks.

4、 Electrical performance, stable and reliable output

1. Signal output: Active current type output is used, with an output signal of DC/4-20mA, and it is required to be connected to a passive resistive load. The formula for calculating the maximum load resistance (including the internal resistance of the transmission line) is Rmax=(V-15)/0.02 (where V is the supply voltage), ensuring that the signal remains stable, reliable, and not easily disturbed during transmission, achieving long-distance transmission.

2. Power supply characteristics: The working voltage is DC/24V ± 2V, which can adapt to voltage fluctuations within a certain range; The no-load working voltage is DC/18V, the maximum protection voltage is DC/30V, the rated current is DC/80mA, and the maximum instantaneous working current is 150mA. There is also a voltage polarity reverse protection inside, which effectively avoids equipment damage due to voltage problems and ensures stable operation of the probe.

5、 Widely used to support industrial development

The application scenarios of KR939SB3 three parameter combination probe are very wide. In the cooling tower fan system, real-time and accurate monitoring of oil temperature, oil level, and vibration is carried out to promptly detect potential faults and hazards, ensure stable operation of the fan, and improve the efficiency of the cooling system. It is widely used in cooling systems in industries such as power, chemical, and metallurgy. In various industrial equipment such as large motors, pumps, compressors, etc. that require monitoring of lubricating oil temperature, oil level, and equipment vibration, it also plays a significant role in providing accurate data support for preventive maintenance of equipment, reducing equipment failure rates, extending equipment service life, improving enterprise production efficiency, and becoming a key component of modern industrial equipment operation monitoring.