Description
Dwyer DHII-008 Digihelic Differential Pressure Controller Overview
The Dwyer DHII-008 Digihelic Differential Pressure Controller is a precision instrument engineered for monitoring and controlling differential pressure in HVAC, building automation, and industrial applications. Designed for use with air and non-combustible gases, this controller combines accurate pressure measurement with integrated control outputs in a single, compact unit — eliminating the need for separate gauges and controllers.
Key Features
- Measurement range: 0 to 25″ w.c. (inches water column)
- Compatible media: Air and non-combustible gases
- Analog output: 4-20 mA DC into 900 Ohm maximum load
- 4-digit LCD display for clear, real-time pressure readings
- Integrated differential pressure controller with adjustable setpoints
- Compact, panel-mount design suitable for field or panel installation
- Ideal for filter monitoring, fan/blower pressure control, clean room applications, and duct static pressure management
Analog Output & Control
The DHII-008 features a standard 4-20 mA DC analog output signal compatible with building automation systems (BAS), PLCs, and data acquisition equipment. The 900 Ohm maximum load rating ensures reliable signal transmission across typical wiring runs found in commercial HVAC and industrial environments. The integrated control functionality allows users to set high and low pressure thresholds, enabling automated system responses without additional external controllers.
Display & Readability
The bright 4-digit LCD display provides continuous, easy-to-read pressure values directly at the instrument — reducing the need for remote monitoring equipment during commissioning and routine maintenance. The clear numerical readout supports fast diagnostics and system verification in the field.
Typical Applications
- HVAC duct static pressure monitoring and control
- Air handler and fan/blower differential pressure measurement
- Filter loading and replacement indication
- Clean room and laboratory pressure control
- Building automation and energy management systems
- Industrial process pressure monitoring with non-combustible gases
Why Choose the Dwyer DHII-008?
Dwyer Instruments is a trusted name in pressure measurement and control instrumentation. The Digihelic series is widely specified by HVAC engineers and building automation professionals for its reliability, ease of installation, and accurate performance across a broad range of differential pressure applications. The DHII-008 delivers the measurement range, output signal, and display functionality needed for demanding commercial and industrial environments.
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