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Dwyer DH3-003 Digihelic Low-Range Differential Pressure Controller
- Regular price
- $822.00
- Sale price
- $822.00
- Regular price
-
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Product Description P/N: DH3-003
Description
Dwyer DH3-003 is a Digihelic differential pressure controller for measuring low-range air and compatible gas pressure. Its 0–0.5 in. w.c. range, two control relays, and 4–20 mA output support pressure and flow control applications.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Dwyer |
| Category | Pressure Control |
| Part Number | DH3-003 |
| Subcategory | Differential Pressure Controllers |
| Series | DH3 Digihelic |
| Instrument type | Differential pressure controller |
| Measurement range | 0–0.5 in. w.c. |
| Measurement modes | Pressure, velocity, volumetric flow |
| Accuracy | ±1% full scale |
| Relay outputs | 2 SPDT, 1 A at 30 VAC/VDC |
| Analog output | 4–20 mA DC, scalable |
| Power supply | 12–28 VAC or 12–28 VDC |
| Process connections | Two 1/8 in. female NPT |
| Display | Backlit four-digit LCD |
| Weight | 3.00 lb |
Information About DH3-003
The DH3-003 is part of Dwyer’s Series DH3 Digihelic controller line, which combines a digital gauge, relay switches, and a transmitter in one instrument. It supports pressure, velocity, or volumetric flow measurement, with setpoints and output scaling configured through its menus. Two SPDT relays provide adjustable setpoint control, and the scalable 4–20 mA output interfaces with compatible control systems. The controller connects to pressure sources through 1/8 in. female NPT ports.
Key Features:
-
Differential Pressure Measurement: Measures low differential pressures in air and compatible non-combustible gases.
-
Pressure Range: Measures 0–0.5 in. w.c. (0–124.5 Pa) for low-pressure HVAC applications.
-
Three-in-One Instrument: Combines a digital pressure gauge, adjustable pressure control relays, and a 4–20 mA transmitter.
-
High Measurement Accuracy: Provides approximately ±1% full-scale accuracy for the 0.5 in. w.c. range under specified conditions.
-
Dual Relay Outputs: Includes two SPDT relays rated at 1 A at 30 VAC/VDC for compatible control circuits.
-
Analog Output: Provides a scalable 4–20 mA DC signal for building automation and monitoring systems.
-
Flexible Power Supply: Operates on 12–28 VDC or 12–28 VAC at 50–400 Hz.
-
Digital LCD Display: Features a backlit four-digit display with indicators for setpoint and alarm status.
-
Adjustable Alarm Settings: Supports configurable setpoints, deadbands, alarm delays, and reset modes.
-
HVAC System Integration: Suitable for filter monitoring, duct static pressure measurement, fan control, and damper control.
The DH3-003 delivers precise low-pressure monitoring and control for HVAC systems, building ventilation, and air-filter status applications.
Description
Dwyer DH3-003 is a Digihelic differential pressure controller for measuring low-range air and compatible gas pressure. Its 0–0.5 in. w.c. range, two control relays, and 4–20 mA output support pressure and flow control applications.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Dwyer |
| Category | Pressure Control |
| Part Number | DH3-003 |
| Subcategory | Differential Pressure Controllers |
| Series | DH3 Digihelic |
| Instrument type | Differential pressure controller |
| Measurement range | 0–0.5 in. w.c. |
| Measurement modes | Pressure, velocity, volumetric flow |
| Accuracy | ±1% full scale |
| Relay outputs | 2 SPDT, 1 A at 30 VAC/VDC |
| Analog output | 4–20 mA DC, scalable |
| Power supply | 12–28 VAC or 12–28 VDC |
| Process connections | Two 1/8 in. female NPT |
| Display | Backlit four-digit LCD |
| Weight | 3.00 lb |
Information About DH3-003
The DH3-003 is part of Dwyer’s Series DH3 Digihelic controller line, which combines a digital gauge, relay switches, and a transmitter in one instrument. It supports pressure, velocity, or volumetric flow measurement, with setpoints and output scaling configured through its menus. Two SPDT relays provide adjustable setpoint control, and the scalable 4–20 mA output interfaces with compatible control systems. The controller connects to pressure sources through 1/8 in. female NPT ports.
Key Features:
-
Differential Pressure Measurement: Measures low differential pressures in air and compatible non-combustible gases.
-
Pressure Range: Measures 0–0.5 in. w.c. (0–124.5 Pa) for low-pressure HVAC applications.
-
Three-in-One Instrument: Combines a digital pressure gauge, adjustable pressure control relays, and a 4–20 mA transmitter.
-
High Measurement Accuracy: Provides approximately ±1% full-scale accuracy for the 0.5 in. w.c. range under specified conditions.
-
Dual Relay Outputs: Includes two SPDT relays rated at 1 A at 30 VAC/VDC for compatible control circuits.
-
Analog Output: Provides a scalable 4–20 mA DC signal for building automation and monitoring systems.
-
Flexible Power Supply: Operates on 12–28 VDC or 12–28 VAC at 50–400 Hz.
-
Digital LCD Display: Features a backlit four-digit display with indicators for setpoint and alarm status.
-
Adjustable Alarm Settings: Supports configurable setpoints, deadbands, alarm delays, and reset modes.
-
HVAC System Integration: Suitable for filter monitoring, duct static pressure measurement, fan control, and damper control.
The DH3-003 delivers precise low-pressure monitoring and control for HVAC systems, building ventilation, and air-filter status applications.
