The filter display unit fdu can measure/ display differential pressure for as long as three filters using inbuilt sensors and is crafted to give fast & accurate display of differential pressure across the filters. Fdu has up to 3 dedicated 4, Digit seven segment, 0. 56 red led displays to fine and, Display pre hepa filters readings. Fdu has an inbuilt buzzer for audible alarm on filter set point exceedance, The filter display also blinks on set point exceedance for operator s attention. It has rs485 communication port with modbus, Rtu protocol for interfacing with plc/dcs/scada systems. It has two digital inputs to indicate the ahu on, Off/trip status. The unit comes with free utility software for configuration and calibration. Fdu is a budget-friendly choice replacement for analog mechanical pressure gauges. Features, Micro, Controller based 3 filter differential pressure indicatorup to 3, 0. 56, 4, Digit red led filter displayssoftware programmable filter ranges3 programmable hi/lo alarms with audio/visua annunciationrs485/modbus rtu communication solutions for programmable logic controllers scada, Etcbuilt in ahu off/trip status led indications via digital inputsahu off/trip soft status available on modbusfree utility software for configuration and calibration