Dwyer DH Series Digihelic® Smart Differential Pressure Digital Display Transmitter
Digihelic smart micro differential pressure controller, pressure/air velocity/flow three-in-one, with 2 sets of SPDT and Modbus.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The DH Series Digihelic is a three-in-one differential pressure controller for pressure, air velocity and flow, with a range of 0.25~100″ w.c. and accuracy of ±0.5% FS. It features 2 sets of built-in SPDT control relays, 4-20mA output and Modbus communication, and allows K-factor and duct size to be set in the menu for air volume conversion.
| Parameter Name | Technical Specifications |
|---|---|
| Main specifications | |
| Medium | Air and non-combustible, non-conductive compatible gases. |
| Wetted materials | Please consult factory. |
| Enclosure material | ABS plastic, UL |
| Certification | 94-V-0. |
| Accuracy | ±0.5% at 77°F (25°C) including linearity and hysteresis. |
| Stability | < ±1%/year. |
| Pressure limits | Range ≤2.5" w.c. = 2 psi; 5": 5 psi; 10": 5 psi; 25": 5 psi; 50": 5 psi; 100": 9 psi. |
| Temperature limit | 32~140°F. (~25°C). |
| Thermal effect | 0.020%/°F (0.036/°C) from 77°F (25°C). |
| Power Supply | High voltage source=100-240 VAC, 50-400 Hz or 132-24 VDC. Low voltage |
| Power dissipation | Low voltage |
| Output Signal | 4-20 mA DC into 900 ohms max. |
| Zero and full-scale adjustment | Conveniently adjustable per manual. |
| Display | 4-digit LCD 0.4" high. LED indicates setpoint and alarm. |
| Electrical connection | Screw terminals. |
| Process connection | 3/16" OD x 1/8" ID compression fitting, 3/16" ID barbed fitting. |
| Enclosure | NEMA 4X (IP66). |
| Mounting orientation | Horizontal. |
| Weight | 14.4 oz (408 g). |
| Communication | Modbus® RTU, RS485, 9600 Baud. |
| Switch type | 2 SPDT relays. |
| Model selection | |
| Selection table | Published on the official website as a screenshot of the selection table; for complete model numbers and ranges, see the official manual "DH.i.pdf" in the documentation package. |
- 0.25~100" w.c. range, accuracy ±0.5% FS
- 2 sets of SPDT control relays, adjustable deadband
- 4-20mA process output, Modbus communication supported
- Menu-selectable pressure/air velocity/air volume, built-in K factor and duct size conversion
- 100-240 VAC or 24 VDC power supply, suitable for control cabinet installation
Cleanroom differential pressure control and alarm
When the differential pressure falls below the setpoint, the relay actuates to interlock the supply fan or audible/visual alarm.
VAV system air volume control
Outputs a signal in air volume mode, participating in VAV terminal or fume hood control.
Need selection advice or bulk quotation?
Send us the working condition parameters (signal type, medium, range, pressure, temperature, connection method), and our engineers will provide a selection scheme and quotation within 1 working day.
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- Email inquiry web@qishan-sh.com
