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Dwyer A3000-0 differential pressure gauge, steel case, 4-inch dial, 0 to .5 In WC range

Dwyer Instruments Inc.

Dwyer Instruments A3000-0 differential pressure gauge 0 to .5 In WC

SKU CH-EY94-GK519

Measures differential pressure from zero to .5 In WC with two DPDT relays rated 10 A at 28 VDC and 10 A at 120 or 240 VAC

  • TypeElectronic
  • Measures low differential pressure down to 0.5 In WC
  • Switches two independent circuits with 10 A DPDT relays
  • Maintains ±3 % accuracy at 70 °F full scale
  • Operates on standard 110 VAC 50/60 Hz power
  • Certified to CE, UL and CSA safety standards

Purpose and users

The Dwyer A3000-0 is an electronic differential pressure gauge built for technicians and facility engineers who must verify low-pressure air or non-combustible gas systems. It serves HVAC commissioning, filter monitoring and laboratory airflow checks where precise indication and relay actuation are required.

Deciding specification

The instrument covers a 0 to .5 In WC range with a minor division of .01 and an accuracy of +/-3% at 70 Deg F full scale, so it suits applications that demand readable increments and documented tolerance within that narrow band. It will not satisfy processes that require measurement above .5 In WC or tighter accuracy than the stated figure.

Integration and clearance

The gauge mounts via a 1/8 In NPT connection and operates on 110 VAC at 50 or 60 Hz, drawing power from standard mains without additional supplies. Its two DPDT relays rated 10 A at 28 VDC or 120/240 VAC directly switch alarms, fans or dampers, freeing the control panel from separate contactors. The 4 In dial and 20 to 120 Deg F ambient range fit typical indoor mechanical rooms, while CE, UL and CSA markings confirm compliance for North American installations.

Highlights

  • Measures low differential pressure down to 0.5 In WC
  • Switches two independent circuits with 10 A DPDT relays
  • Maintains ±3 % accuracy at 70 °F full scale
  • Operates on standard 110 VAC 50/60 Hz power
  • Certified to CE, UL and CSA safety standards

Specifications

BrandDWYER INSTRUMENTS
TypeElectronic

Questions about this item

What does the ±3 % accuracy at 70 °F mean when the gauge is installed?

Readings will stay within three percent of the 0.5 In WC full scale when the ambient temperature is around 70 °F.

How do the 1/8 In NPT connections limit the piping I can use?

They accept standard 1/8 inch NPT fittings, so tubing or pipe must match that thread size and pressure rating.

What clearance does the 4 In dial need for panel mounting?

Allow at least a 4 In diameter cut-out plus space behind the panel for the 110 VAC wiring and relay terminals.

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