LCD Digital Differential Pressure Indicator are part replacement for the analog magnahelic® gauges & are easy to use with clear 4 digit led display. It comes with built in sensor & also a buzzer alarm with acknowledgement facility for process violation alert. Salient features include unit conversion at the press of a key between mm.w.c. & Pascals, integrated buzzer alarm for set point violation, offset provision io meet audit requirements, analog 4-20ma output, 30 mm. Depth for clean room modular wall fitment & RS 485 modbus communication for BMS / SCADA / PLC integration.