Description
Dwyer A3010 Photohelic® Pressure Switch/Gage Overview
The Dwyer A3010 Photohelic® Pressure Switch/Gage is a precision dual-function instrument that combines accurate differential pressure indication with integrated switching capability in a single, compact unit. Designed for HVAC, cleanroom, and industrial applications, it provides reliable pressure monitoring and automatic switching without the need for separate devices — saving installation time and panel space.
Key Features
- Dual-function design: combines pressure gage and adjustable set-point switching in one instrument
- Pressure range: 0–10.0″ W.C. (inches water column)
- 4″ diameter dial face for clear, easy-to-read indication at a distance
- 1/8″ FNPT pressure port connection for straightforward installation
- Photohelic® technology uses a light-beam sensing mechanism for highly repeatable, accurate switching without mechanical contact on the gage movement
- Two independently adjustable set points allow for high and low limit switching or differential control
- Suitable for monitoring filter loading, fan performance, airflow, and clean-room pressurization
Specifications
- Model: A3010
- Pressure Range: 0–10.0″ W.C.
- Connection: 1/8″ FNPT
- Dial Face: 4″ diameter
- Switching Technology: Photohelic® (optical, non-contact switching)
- Set Points: Two independently adjustable
- Brand: Dwyer Instruments
Common Applications
- HVAC air handling unit filter status monitoring
- Cleanroom and controlled environment pressurization verification
- Fan and blower differential pressure monitoring
- Duct static pressure control and alarming
- Industrial process pressure indication and switching
Why Choose the Dwyer A3010?
The Photohelic® design eliminates the wear and hysteresis issues common with mechanical switch contacts, delivering long service life and consistent set-point accuracy. The large 4″ dial ensures readability in field installations, while the compact, all-in-one form factor reduces wiring complexity and installation costs. Whether you’re managing filter maintenance schedules or protecting critical HVAC equipment, the Dwyer A3010 delivers dependable performance.
