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Lefoo Digital Pressure Switch

Pressure Range: -100~100kpa
Pressure Accuracy: 1%FSO
Work Temperature: 0~50 °C
Measure media: Non-corrosive dry gas
Output: digital 4~20ma/1~5V, Swith NPN /PNP
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  • Digital Pressure Switch LFDS62

    Digital Pressure Switch LFDS62

    LEFOO LFDS62 adopts a high-reliability ceramic core for pressure measurement, the signal is processed by the back-end circuit and displayed, and the relay output is automatically controlled according...

  • Pressure Controller LFDS63

    Pressure Controller LFDS63

    LFDS63 (630/631/632) series adopts high reliable transmitter for pressure measurement. The signal is processed by the back-end circuit and displayed, and the relay output is automatically controlled ...

  • Pressure Switch Controller LFDS65

    Pressure Switch Controller LFDS65

    LFDS65 (650/652) series intelligent pressure controller is an intelligent control instrument which integrates pressure measurement, large LCD screen display and control ability. The instrument can au...

  • Digital Pressure Switch Transmitter LFDS68

    Digital Pressure Switch Transmitter LFDS68

    LFDS68 Pressure Switch is a fully electronic device, it uses a high-precision, high-stability silicon piezoresistive sensor with a dedicated signal conditioning circuit. It features on-site digital di...

LEFOO digital pressure switch pressure measurement

The piezo-resistive works on a Wheatstone bridge principle that will undergo deformation due to pressure on its area and change resistivities on 4 bridges, this is called the piezo-resistive effect. Usually, four strain gauges are embedded and connected to a Wheatstone bridge.  The signal amplifier amplifies the measuring signals from the strain gauge and Wheatstone bridge and synchronously optimizes the results, and the results are transferred by the squeezing electric power of the silicon wafer.

The digital pressure switch is used to replace electric contact pressure gauges and used in systems with higher requirements for industrial control. This digital LEFOO pressure switch has a wide application in monitoring and controlling the flow of air and aggressive gases. For the consideration of environment friendly and less contaminant we did not use oil-extended silicon sensor. This digital pressure switch is built in a plastic housing and it might undergo deformation when encounter extreme huge pressure and influence its accuracy.  The digital pressure switches made by Lefoo is mainly based on diffused silicon piezoresistive sensor and electric circuit bridge in the relay, that provides both pressure measurement and simple control movement. 

The digital pressure switch has a built-in precision pressure sensor, which amplifies the pressure signal through a high-precision instrument amplifier, collects and processes data through a high-speed MCU, and generally uses a 4-digit LED to display the pressure in real time, and the relay signal output. The upper and lower limit control points can be set freely.


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