SERIES DHC Digihelic®

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Dwyer Series DHC Digihelic® | 3-in-1 Differential Pressure Controller

DWYER SERIES DHC Digihelic® | 3-in-1 DIFFERENTIAL PRESSURE CONTROLLER

The Series DHC Digihelic®  is an innovative 3-in-1 instrument that functions as a high-precision digital pressure gage, a dual SPDT control relay, and a transmitter with current and voltage outputs.

  • 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

DWYER SERIES DHC Digihelic® | 3-in-1 DIFFERENTIAL PRESSURE CONTROLLER

The Dwyer Series DHC Digihelic® is a highly versatile differential pressure controller designed to reduce installation time and inventory by combining three critical instruments into one housing. It provides precise measurement for pressure, velocity, and volumetric flow with up to 0.5% full-scale accuracy. Equipped with two SPDT relays and scalable 4-20 mA or voltage outputs (0-5V, 0-10V), the unit supports modern communication protocols including BACnet MS/TP and Modbus® RTU. Its rugged polycarbonate construction and IP66/NEMA 4X rating make it suitable for demanding industrial and HVAC environments.

PRODUCT USES:

  • HVAC System Control: Monitoring building automation and air handler performance.
  • Clean Room Monitoring: Precise control of room differential pressure to maintain sterility.
  • Dust Collection: Tracking filter pressure drop to optimize cleaning cycles.
  • Fan & Damper Control: Regulating airflow through velocity and volumetric flow measurements.
  • Fume Hoods: Ensuring safe face velocities in laboratory settings.

Technical Sheets

Instruction Manual

Catalog Page

Specifications

DWYER SERIES DHC Digihelic® | 3-in-1 DIFFERENTIAL PRESSURE CONTROLLER – KEY SPECIFICATIONS

  • Accuracy: ±0.5% FSO for most ranges; up to ±1.5% for extremely low ranges (≤0.25 in w.c.).
  • Output Signal: 4-20 mA (4-wire), 0-5V, 0-10V, 1-5V, and 2-10V.
  • Relay Switches: Two (2) SPDT relays rated at 1 A @ 30 VAC/VDC.
  • Communications: BACnet MS/TP and Modbus® RTU.
  • Power Requirements: 12-28 VDC or 12-28 VAC (50-400 Hz).
  • Enclosure Rating: NEMA 4X (IP66).
  • Display: 4-digit backlit LCD with LED setpoint status indicators.
  • Process Connections: 1/8″ female NPT (side and back ports).

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