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Capacitance liquid level transmitter

A liquid level transmitter, capacitive technology, applied in the field of sensors, can solve the problems that small capacity and shallow liquid level measurement cannot be realized, and achieve the effect of increasing the range of change

Inactive Publication Date: 2014-06-18
上海朝辉压力仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect that the capacitive liquid level transmitter in the prior art cannot realize the measurement of small capacity and shallow liquid level, and provide a capacitive liquid level transmitter capable of measuring small capacity and shallow liquid level. sender

Method used

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Embodiment Construction

[0037] A preferred embodiment will be given below, and the present invention will be described more clearly and completely in conjunction with the accompanying drawings.

[0038] Such as figure 1 As shown, the capacitive liquid level transmitter of this embodiment includes a measuring rod, which includes a hollow cylindrical metal outer rod 18 and a hollow cylindrical metal inner rod 16, and the metal inner rod 16 is socketed In the metal outer rod 18, a liquid accommodating cavity 23 is formed between the two. The metal outer rod 18 has a liquid inlet 24 and a first collection end 25. Four inlets are arranged on the liquid inlet 24. The liquid holes 21 and the first collection end 25 are provided with four vent holes 22 , and the liquid inlet holes 21 and the vent holes 22 are both connected to the liquid accommodating chamber 23 .

[0039] During use, the measuring rod is vertically inserted into the liquid to be measured, and the liquid to be measured flows into the liquid...

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Abstract

The invention provides a capacitance liquid level transmitter. The liquid level transmitter comprises a measuring rod, a compensation circuit board and an amplification circuit board. The measuring rod comprises a metal outer rod and a metal inner rod sleeved in the metal outer rod, the metal outer rod and the metal inner rod are 50mm to 450mm long, the section areas of the metal outer rod and the metal inner rod are between 10mm<2> and 700mm<2>, and a liquid accommodation cavity is formed between the metal outer rod and the metal inner rod. The linearity range of the compensation circuit board is + / -1% FS, the temperature compensation range is between 0 DEG C and 80 DEG C, and the amplification time of the amplification circuit board is higher than 1000. The capacitance liquid level transmitter is capable of measuring the small capacity and low liquid level.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a capacitive liquid level transmitter. Background technique [0002] The liquid level transmitter is an extension and development of the pressure transmitter technology. According to the principle that the pressure generated by liquids with different specific gravity at different heights has a linear relationship, it can realize the volume, liquid height and weight of water, oil and paste. accurate measurement and transmission. Because it is suitable for continuous detection under harsh conditions such as high temperature and high pressure, strong corrosion, easy crystallization, and easy clogging, capacitive liquid level transmitters play an important role in liquid level measurement. The capacitive liquid level transmitter is based on the principle that the measured static pressure of the liquid is proportional to the height of the liquid, that is, the capacitance change generated by tw...

Claims

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Application Information

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IPC IPC(8): G01F23/26
Inventor 陈明伍正辉龙霞
Owner 上海朝辉压力仪器有限公司
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