Differential pressure controller

The Series DH DigiHelic differential pressure controller is suitable for pressure, velocity and flow applications, achieving a 0.5% full scale accuracy on ranges from 0.25 in wc to 100 in wc. It provides a 4-20 mA process output, 2 SPDT relays with adjustable dead bands, and selection of pressure, velocity or flow operation.

The instrument delivers simplified programming via a menu key. Users can select from a multitude of options, including: security level; setpoint or setpoint and alarm operation; auto or manual alarm reset; English or metric engineering units; K-factor adjustment for use with various pitot tubes and flow sensors; and circular or rectangular duct size for volumetric flow operation.

It can operate from either 120/220 VAC or 24 VDC. Modbus communications is standard with every unit. In addition, units are compact, housed in a 1/8 DIN enclosure.