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Dwyer

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% 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 dampening for smoothing erratic process applications; scaling the 4-20 mA process output to fit your   applications range and field calibration. See applications below for

APPLICATIONS
• Dust collection bag filters
• SCFM flow in ducts
• Filter status
• Static pressures in ducts or buildings
• Damper control
• Fan control

SPECIFICATIONS
Service: air and non-combustible,compatible gases.
Housing material: die cast aluminum case and bezel.
Accuracy: <5˝ w.c. (except ±2.5˝ w.c.): ±1%; All other ranges: ±0.5% at 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).
Stability: <±1% per year.
Pressure Limits: ranges  ≤2.5˝ w.c.: 25 psi;  ±2.5”, 5˝ w.c.:5 psi; 10˝ w.c.: 5 psi;  25˝ w.c.: 5psi;  50˝ w.c.: 5 psi;  100˝ w.c.: 9 psi.
Temperature limits: 32 to 140°F (0 to 60°C).
Compensated temperature limits: 32 to 140°F (0 to 60°C).
Thermal effects: 0.020%/°F (0.036/°C) from 77°F (25°C).
Power requirements: 12-24 VAC/VDC.
Power consumption: 3 VA max.
Output signal: 4-20 mA DC into 900 ohms max.
Zero & Span Adjustments: Accessible via menus.
Response Time: 250 ms (dampening set to 1).
Display: Backlit 4 digit LCD 0.4˝ height LED indicators for set point and alarm status.
Electrical connections: 15 pin male high density D-Sub connection. 18˝ (46 cm) cable with 10 conductors included.
Process connections: 1/8˝ female NPT. Side or back connections.
Mounting orientation: mount unit in vertical plane.
Size: 5˝ (127 mm) O.D. x 3-1/8˝ (79.38 mm).
Weight: 1.75 lbs. (794 g).
Agency Approvals: CE.

SWITCH SPECIFICATIONS
Switch type: 2 SPDT relays.
Electrical rating: 1 amp @ 30 VAC/VDC.
Set point adjustment: adjustable via keypad on face.


Models in stock In Stock n/d Out of Stock

Disp. Code Description Price % Discount Net Price
in stock 7740
DH3-002

Range: 0-0,25"H2O (0-62,28 Pa). Engineering units selectables.

361,00 € 0% 361,00 €
Selected:
n/d 7741
DH3-003

Range: 0-0,5"H2O (0-127 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
n/d 8084
DH3-004

Range: 0-1 "H2O (0-249 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
n/d 7742
DH3-005

Range: 0-2,5 "H2O (0-622 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
n/d 8070
DH3-006

Range: 0-5 "H2O (0-1245 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
in stock 8405
DH3-007

Range: 0-10 "H2O (0-2491 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
in stock 8406
DH3-009

Range: 0-25 "H2O (0-6350 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
in stock 9909
DH3-013

Range: 0,25-0-0,25" H2O (62-0-62 Pa). Engineering units selectables.

361,00 € 0% 361,00 €
Selected:
in stock 8800
DH3-014

Range: 0,5-0-0,5" H2O (127-0-127 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
in stock 8509
DH3-015

Range: 1-0-1" H2O (249-0-249 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
in stock 8756
DH3-016

Range: 2,5-0-2.5" H2O (622-0-622 Pa). Engineering units selectables.

292,00 € 0% 292,00 €
Selected:
 

* Price are VAT excluded.

in stock In Stock
n/d Out of Stock