Piezoresistive differential pressure transmitter

The piezoresistive differential pressure transmitter is an integrated fully welded (no sealing ring) differential pressure measuring element, filled with silicone oil between the chip and two corrugated membranes.

MDM491 typePiezoresistive differential pressure transmitterIt is an integrated fully welded (without sealing ring) differential pressure measuring element, filled with silicone oil between the chip and two corrugated membranes. The measured differential pressure is applied to the corrugated membranes at both ends, and the differential pressure is transmitted to the sensitive chip through silicone oil. The sensitive chip is connected to the signal processing circuit through wires. This product utilizes the piezoresistive effect of semiconductor silicon materials to achieve the conversion of differential pressure and electrical signals. Due to the good linear relationship between the signal output by the Wheatstone bridge on the sensitive chip and the differential pressure, accurate measurement of the measured differential pressure can be achieved. Suitable for differential pressure measurement of various gases and liquids in pipelines such as petroleum, chemical, power, and hydrology.

　　Piezoresistive differential pressure transmitterProduct features: All stainless steel structure design, compact size and light weight, easy installation; Welded structure, fully sealed, with a shell protection level of IP65; The sensor is a diffusion silicon piezoresistive differential pressure sensor with a stainless steel 316L isolation diaphragm; After temperature compensation and aging screening, the performance is stable and reliable; Plug in type products can adjust the zero point and fullness externally;

Electrical performance • Power supply: 15V~28V DC • Output signal: 4mA~20mA DC (two-wire system); 0V/1V~5V/10V DC (three wire system); 0mA~10mA/20mA DC (three wire system) • Electrical connection: connectors or cables • Response time (10%~90%): ≤ 1ms • Insulation resistance: 100M Ω @ 50V DC Structural material • Shell: stainless steel 304 • Ripple membrane: stainless steel 316L • Infusion liquid: silicone oil Environmental conditions • Vibration: change after vibration at 3gRMS, 30Hz~2000Hz ≤± 1% • Impact: change after 100g, 10ms ≤± 1% • Medium: liquid or gas suitable for the structural material