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Series DHC Digihelic® Differential Pressure Controller
3-in-1 Differential Pressure Controller
The Series DHC Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with both current and voltage outputs. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time, and cost. The Series DHC Digihelic® differential pressure controller is the ideal instrument for pressure, velocity, and volumetric flow applications reading in several commonly used engineering units with optional unidirectional or bidirectional ranges. These units achieve a 1.5% or better accuracy on extremely low ranges, and 0.5% accuracy for ranges at or above 1 in w.c. Calibration can be performed in the field, making maintaining its accuracy more manageable. Additionally, the Series DHC Digihelic® differential pressure controller includes 2 SPDT control relays with adjustable deadbands. Programming the unit is simple using the built-in menu. With scalable 4-20 mA, selectable voltage process outputs, and selectable Modbus® or BACnet communication, this controller can easily fit into your application.
NIST CALIBRATION available in Product Configurator.
Product Applications
- SCFM duct flow
- Filter status
- Duct or building static pressure
- Damper and fan control
Models & Ordering
Specifications
- Service:
- Air and non-combustible, compatible gases.
- Wetted Materials:
- Consult factory.
- Housing Material:
- Polycarbonate.
- Accuracy:
- ±0.5% FSO for all ranges, except 0.5 in w.c. @ ±1% FSO, and ranges at or below ±0.25 in w.c. @ ±1.5% FSO.
- Stability:
- < ±1% / year FSO.
- Pressure Limits:
- Ranges > 1 in w.c.: 6 psi max operation, 6 psi burst; Ranges ≤ 1 in w.c.: 3.6 psi max operation, 6 psi burst.
- Temperature Limits:
- -4 to 158°F (-20 to 70°C).
- Thermal Effects:
- .02% FS / °F (.036% FS / °C).
- Power Requirements:
- 12-28 VDC or 12-28 VAC 50 to 400 Hz.
- Power Consumption:
- 3 VA max.
- Output Signal:
- 4-20 mA (4-wire); 0-10 V, 0-5 V, 1-5 V, and 2-10 V (4-wire).
- Communication:
- BACnet MS/TP or Modbus® RTU.
- Supported Baud Rate:
- 9600, 19200, 38400, 57600, 76800, 115200.
- Device Load:
- 1/8 unit load.
- Zero and Span Adjustments:
- Accessible via menus.
- Response Time:
- 400 ms (damping set to 0).
- Display:
- Backlit LCD display, LED setpoint indicators.
- Electrical Connections:
- 15 pin male high density D-sub connection. 18" (46 cm) cable with 15 conductors included.
- Process Connections:
- 1/8" female NPT ports on side and back.
- Enclosure Rating:
- NEMA 4X (IP66).
- Mounting Orientation:
- Not position sensitive.
- Size:
- 5" OD (127 mm) x 1.9" (48 mm) deep.
- Weight:
- 8.8 oz (250 g).
- Compliance:
- BTL, CE.
- SWITCH SPECIFICATIONS
- Switch Type:
- 2 SPDT relays.
- Electrical Rating:
- 1 A @ 30 VAC/VDC.
- Set Point Adjustment:
- Accessible via menus.
Features
- One instrument saves inventory, installation time, and money with its measurement versatility and innovative 3-in-1 design
- Measurement precision via full-scale accuracy of 1.5% or better on extremely low ranges, and 0.5% for ranges at or above 1 in w.c.
- Safe and secure with security menu programming
- Simplified field upgrade to DHC pressure controller with optional stainless steel bezel
Options
- -FC Factory calibration certificate
- -NIST NIST traceable calibration certificate
- -SS 304 brushed stainless steel bezel
Accessories
| Model Number | Description | Usually Ships* | Price | Order | |
|---|---|---|---|---|---|
 |
A-299 | Mounting bracket flush mount Magnehelic® gage in bracket. Bracket is then surface mounted . Steel with gray hammertone epoxy finish. 6.3" x 7.7" x 4.0", 1.30 lb. | Next Day | $38.25 | Order |
 |
A-300 | Flat aluminum bracket for flush mounting Magnehelic® gage. 6.8" x 6.0" x .1", .35 lb. | Next Day | $33.75 | Order |
 |
A-301 | Static pressure tip, for 1/4" metal tubing connection. | Next Day | $12.50 | Order |
 |
A-302 | Static pressure tip, for 3/16" and 1/8" ID plastic or rubber tubing. | Next Day | $11.75 | Order |
 |
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 | Next Day | $11.75 | Order |
 |
A-330 | 1/8" pipe plug, socket hex, plated steel. | Next Day | $4.00 | Order |
 |
A-489 | 4" 303 SS straight static pressure tip with flange, 1/4" hose barb. | Next Day | $9.00 | Order |
 |
A-331 | 1/8" NPT filter vent plug, nylon and sintered metal. | Next Day | $11.25 | Order |
Model Chart
DHC DIGHELIC DIFF PRESS CONTROLLER
DHC-X-OPT
1ST SYMBOL (1ST X) RANGE
001 0.1 IN WC
002 0.25 IN WC
003 0.5 IN WC
004 1 IN WC
006 2.5 IN WC
008 5 IN WC
009 10 INWC
010 25 INWC
011 50 INWC
012 100 INWC
201 ± 0.1 IN WC
202 ± 0.25 IN WC
203 ± 0.5 IN WC
204 ± 1 IN WC
206 ± 2.5 IN WC
208 ± 5 IN WC
209 ± 10 IN WC
051 25 PA
052 30 PA
053 60 PA
055 125 PA
056 250 PA
251 ± 25 PA
252 ± 30 PA
253 ± 60 PA
255 ± 125 PA
256 ± 250 PA
082 6 MM WC
084 25 MM WC
282 ± 6 MM WC
284 ± 25 MM WC
OPTIONS (OPT)
-COO CERTIFICATE OF ORIGIN
-FC FACTORY CALIBRATION CERTIFICATE
-NIST NIST TRACEABLE CALIBRATION CERTIFICATE
-SS 304 BRUSHED STAINLESS STEEL BEZEL
