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The float level switch is a magnetic floating ball as a measuring component. The magnetic resistance is used to make the resistance inside the sensor change linearly. The change of the resistance is converted into a 4~20mA standard current signal by the intelligent converter, and the HART signal output or the local device is superimposed. The liquid crystal display can display the percentage of the liquid level, the current of 4~20mA and the liquid level value in the field. The remote control supply room can realize the automatic detection, control and recording of the liquid level.
The meter is suitable for the sewage treatment of petroleum, chemical, electric power, light industry and medicine industries and the measurement of medium liquid level in various atmospheric and pressure vessels, especially for the measurement of the liquid level of underground storage tanks and storage tanks. The float liquid level sensor is composed of a float ball, a plunger, etc., and is mounted on the top of the container through a connecting flange. The float ball floats on the liquid surface according to the principle of discharging the liquid volume phase, and the float ball also follows when the liquid level of the container changes. Moving up and down, due to the magnetic effect, the reed spring of the float liquid level sensor is magnetically attracted, and the liquid level position is changed into an electric signal, and the actual position of the liquid is displayed by the display meter digitally, and the float liquid level sensor reaches the liquid level. Remote detection and control.
The correct use of the float level switch:
1. Check whether the liquid level meter is within the verification period before use. Otherwise, it should be checked and replaced if it is unqualified.
2, the sensor should be installed horizontally, the length of the entry should meet the technical requirements.
3. The connection between the sensor and the explosion-proof junction box should be tight and tight, and no rainwater should be leaked.
4, the wiring should be carried out according to the instructions for use, can not be shorted or wrong.
5. The float level sensor should work within the set measurement range and must not work over the range.
The correct maintenance method of the float level switch :
1. After 6 months to 1 year of operation, the sensor should be visually inspected and routinely verified.
2. Regularly check whether the sensor is bent and deformed by external force to avoid causing the card to malfunction.
3. Regularly check whether the sensor's magnetic sensor switch component is out of aging, not less than 1 time per month.
4. The sensor verification period is 1 year.
5. Check that the float ball level sensor protection sleeve must not have leakage.
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