Tuning fork level switch measuring principle

What is the measurement principle of the tuning fork level switch? 1. Measurement principle of the tuning fork level switch The tuning fork level switch adopts piezoelectric devices to realize the vibration drive and detection of the fork body. When the fork body contacts the liquid to be tested, the resonance frequency of the fork body is obviously reduced, and the change of the vibration frequency is directly reflected on the output signal of the piezoelectric detection device, and the detection circuit judges the change of frequency and outputs a switch signal. When measuring the high point, when the fork body touches the liquid medium, the meter will generate an alarm signal; when measuring the low point, if the liquid medium is lower than the fork body position, the meter will also generate an alarm signal. As for whether to install the tuning fork liquid level switch at the high point, the low point, or both the high and low points, it depends on the needs of the job site. 2. Instructions for the use of the tuning fork liquid level switch 1. In theory, the tuning fork liquid level switch can be installed in any position as required, but if it is installed at the inlet position, the measurement error caused by the measurement error may even damage the instrument. When installing the position switch, try to avoid the inlet and outlet of the material for installation. Schematic diagram of the correct installation of the tuning fork level switch 2. The tuning fork level switch can be installed horizontally, vertically or obliquely. However, if the measured medium is relatively viscous, in order to reduce or avoid the phenomenon of hanging material, the tuning fork level switch should be installed vertically. 3. When installing the tuning fork liquid level switch, in order to make the instrument detect more accurately, the surface of the fork body should be kept parallel to the lifting or flow direction of the liquid, so as to avoid the phenomenon of hanging material and prevent the resistance of the medium to the fork body. The data is biased to improve the accuracy of the measurement. 4. When the electronic components are damaged or out of order, it is recommended to replace the electronic components of the tuning fork liquid level switch in order to enable the instrument to continue to work normally. If the signal output mode of the electronic components is different, it should be adjusted accordingly to select the electronic components that meet the requirements. If the actual working conditions have explosion-proof requirements for the tuning fork liquid level switch, attention should be paid to the use of electronic components that meet the corresponding explosion-proof requirements when replacing. In addition to the tuning fork type liquid level switch, the externally mounted liquid level switch is also a commonly used liquid level switch. It only needs to suck the ultrasonic probe on the side wall of the storage tank to realize the high/low level alarm for the liquid level, which is safe and explosion-proof, without the need for Open hole hot stop installation, safe and convenient. Related product links: Externally mounted liquid level switch
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