807 Low Temperature Liquid Level Sensor is a customized product specially designed for liquid level measurement in low temperature environments such as liquid nitrogen, LNG, and liquid ammonia. -196℃~80℃ available.
This product has no moving parts and is not disturbed by the external environment. It has the advantages of stable and reliable long-term operation, high sensitivity, good linearity, low temperature resistance and corrosion resistance. The cryogenic level meter provides a variety of output signals RS232\ RS485\ 0～5V \4～20mA.
|Current sensor metrics
|Detector working temperature
|As shown on the nameplate
|2088 explosion-proof shell
|2088 explosion-proof shell/304 stainless steel micro shell
807 Low Temperature Liquid Level Sensor Wiring
The connection position is equipped with integrated 4-bit terminal, defined as shown in Figure:
OUT +: Power Supply +
OUT-: Power Supply-
TEST +: Debug the interface
TEST-: Debug the interface
Note: The sensor TEST (R485) for 4 ~ 20 mA signal is for commissioning only
Precautions for use
- There can only be one type of RS232/RS485/0-5V/4~20mA signal, and you can choose to use any one of them. The RS485 bus can connect multiple sensors at the same time, but the communication address of each sensor must be set in advance. The communication address of each sensor must be unique to prevent the bus from locking up. The RS485 bus uses a half-duplex chip, so the module should be allowed time to respond when reading data. The reading speed cannot be too fast. The time interval between two instructions during continuous reading cannot be less than 200ms.
- It is recommended that the sensor be connected with a shielded wire, especially for RS232 communication. The communication wire should not be too long.
- For RS232/RS485 signal sensors, when troubleshooting communication failure, you can swap the blue and yellow wires for testing. If the communication is successful, it means there is a wiring error. This operation is for digital communications only.
- The power supply voltage of the sensor shall not exceed its normal working voltage, and the power consumption of the sensor power supply shall not be less than the power consumption of the sensor during normal operation.
- The actual environment should meet the basic parameter requirements of the sensor and must not exceed the normal range, otherwise it will cause damage to the sensor and even cause other accidents.
- The sensor outputs the position height signal of the medium. When the filtering is zero, the output value reflects the actual change of the liquid level. The output value changes with the rise or fall of the liquid level. After adding the filtering, the value will Becomes stable and lagging, the larger the filter value, the higher the temperature, the liquid level value will lag behind the change of the actual liquid level. Therefore, customers adjust the filter value based on device usage.
- Please do not disassemble or damage the sensor maliciously, otherwise the warranty will be void.
- All accessories such as rubber pads and O-rings of the sensor are not covered by the warranty.
More Low Temperature Liquid Flow and Pressure Measurement
807 Low Temperature Liquid Level Sensor is a customized sensor, which is limited to the measurement of low-temperature liquid level and cannot be used for other media.
We, Sino-Inst, are a professional high-tech enterprise focusing on the research and development, production, sales and engineering services of liquid level/pressure/flow sensors and transmitters, intelligent instruments and automated control systems. Our main products include liquid level, pressure and flow sensors, transmitters and other field measurement instruments.
We provide customers with measurements under various high temperature, low temperature, explosion-proof and other special working conditions. If you need Low Temperature Liquid Level measurement, please feel free to contact our sales engineers.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.