DIGITAL PRESSURE SWITCH

 In many pressure measuring-based control systems, electronic digital pressure switches have replaced mechanical digital air pressure switch. These digital pressure switches bring a variety of functions like LCD visibility, easy settings and adjusting of the threshold points.

 

PIEZO-RESISTIVE 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.

 

This digital 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.  LEFOO digital pressure switches are mainly based on diffused silicon piezoresistive sensor and electric circuit bridge in the relay, that provides both pressure measurement and simple control movement.