Level Sensor High Temperature Pressure Sensor Switch Sensor Load Cell Liquid Sensor
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[What is a liquid level sensor]
The level sensor (Hydrostatic Level Gauge/Level Transmitter/Level Sensor/Water Level Sensor) is a pressure sensor that measures the level. The static pressure input type liquid level transmitter (level gauge) is based on the principle that the measured hydrostatic pressure is proportional to the height of the liquid, adopting foreign advanced isolated diffusion silicon sensitive element or ceramic capacitance pressure sensitive sensor, and will be static The pressure is converted into electrical signals, which are then subjected to temperature compensation and linear correction and converted into standard electrical signals (typically 4-20 mA/1 to 5 VDC).
[Level sensor wiring method]
Level sensor, the general output signal is current 4-20MA, 0-20MA, or voltage 0-5V, 1-5V, 0-10V, etc. Usually the current type is two-wire or four-wire, voltage three-wire output. At present, many do not have 24VDC power supply, most of which are 10V. Some transmitters with large power consumption cannot be driven by the 10VDC power supply. Therefore, only 24VDC can be used as an external power supply. In this way, the liquid level wears an Qi and there are four terminals: power supply +, power supply -, feedback + and feedback -. 
Four-wire connection of the liquid level sensor wiring: power supply +==supply+; power supply===power supply;; signal +==feedback+, signal-==feedback-.
Liquid level sensor wiring of the current type two-wire system connection: power supply + = = power supply +; signal + = = feedback +, power supply - = = feedback - if you do not remotely just connect 24V voltage +, - if you need to The transmission needs to form a loop, such as 24V+ pressure gauge+, pressure gauge-connect 4-20mA+, 4-20mA-connect 24V-, and there may be terminals in the middle. Look at the circuit diagram.
The voltage type three-wire connection mode of the liquid level sensor connection: power supply +==power supply+; power supply-(signal-)==power-supply;; signal+==feedback+, power supply-(signal-).
[Difference between level sensor and level switch] 
The level switch is a type of controller that keeps the water level constant by opening a valve for discharging water or water according to the signal output of the level sensor. It can also be said that the output of the level switch is a kind of switch signal, and the liquid level switch first determines the height of the liquid level, and outputs the switch amount signal according to this height. The level sensor outputs the level of the liquid level as an electrical signal. We can process electrical signals such as plc, data loggers, or professional monitors to output the height of the liquid level. There is also the same principle as the level switch and level sensor. However, the level switch is a switch control circuit, and the liquid level sensor is a circuit element that is equivalent to a transformer and a converter.
Summary: The above is the level sensor wiring and related knowledge collected by Xiao Bian for everyone. I hope to help everyone! I believe that after reading the above article, we have a certain understanding of the level sensor wiring! If you want to learn more about this knowledge, please pay attention to this site information platform! Here are more things you want to know!
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Finishing:high-pressure electrostatic spray coating
Standard Height:2,000mm, 2,500mm, 3,000mm and space between poles 1,000mm, 2,000mm and 2,500mm. it is available upon customer request.
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Applications:
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Level sensor wiring is very important for the use of level sensors. Only the correct wiring will reduce the error during the operation of the liquid level sensor, otherwise it will easily lead to the damage of the liquid level sensor and affect the accuracy of the measurement. So how to connect the liquid level sensor? The next small series for everyone to introduce the level sensor wiring method.