Series DH3 Digihelic® Differential Pressure Controller
The Series DH3 Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular Photohelic® gage 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 1.5% 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 deadbands 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.
Please see Series AT-DH3 for ATEX approved.For additional ranges, see Series DHC Digihelic® Differential Pressure Controller.
- SCFM flow in ducts
- Filter status
- Static pressures in ducts or buildings
- Damper control
- Fan control
|A-298||Flat aluminum bracket for flush mounting Photohelic® & Capsuhelic® gages, 603A, 605, and 3000MR.||1-3 days*||
|A-301||Static pressure tip, for 1/4" metal tubing connection.||1-3 days*||
|A-302||Static pressure tip, for 3/16" and 1/8" ID plastic or rubber tubing.||1-3 days*||
|A-302F-A||303 SS Static pressure tip with mounting flange, for 3/16" I.D. rubber or plastic tubing. 4" insertion depth, includes mounting screws||1-3 days*||
|A-320-B1||Weatherproof enclosure, ABS, compatible with 3000MR/MRS Photohelic® switch/gage, 605 Magnehelic® differential pressure transmitter, DH3 Digihelic® pressure controller (to fit, the casing on the electrical plug must be removed), 2000 Magnehelic® gage with medium and high pressure options||1-3 days*||
|A-370||Flush mount bracket used with: Photohelic® 3000MR/MRS, Capsuhelic®, 631B Transmitter. Bracket is then surface mounted. Steel with gray hammertone epoxy finish.||1-3 days*||
|A-489||4" 303 SS straight static pressure tip with flange, 1/4" hose barb.||1-3 days*||
|A-700||Power supply (0.5 A)||1-3 days*||