The Series DH3 Digihelic Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gauge, control relay switches, and a transmitter with current output all packed in the popular Photohelic gauge style housing. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money.
The Digihelic controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1% full scale accuracy on ranges down to the extremely low 0.25″ w.c. to 2.5″ w.c. full scale. Ranges of 5″ w.c. and greater maintain 0.5% F.S. accuracy. Bi-directional ranges are also available.
The Series DH3 Digihelic controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. 2 SPDT control relays with adjustable dead bands are provided along with a scalable 4-20 mA process output.
Programming is easy using the menu key to access 5 simplified menus which provide access to:
Security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area in flow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manual alarm reset; alarm delay; view peak and valley process reading; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your applications range and field calibration.
Features:
- Mounting Style: Vertical
- Temp Rating: 32 – 140 F
- Process Connections: 1/8″ FNPT
- Material: Aluminum
- Size: 5″ OD x 3-1/8″
- Electrical Connections: 15 pin male high density D-sub connection, 18″ cable included
Applications: SCFM flow in ducts; Filter status; Static pressures in ducts or buildings; Damper control; Fan control
