Description
The A.J. Antunes JD-2-PURPLE is an OEM industrial differential vacuum and air pressure switch engineered for precise low-pressure detection and control in HVAC, combustion safety systems, air handlers, and equipment interlock applications. With a calibrated range from 0.1″ to 10″ water column (W.C.), this purple spring version offers exceptional sensitivity for airflow proving, filter monitoring, fan verification, and system safety logic.
Key Features
- Pressure/Vacuum Range: 0.1″–10″ W.C. with purple spring calibration — ideal for low differential pressure applications.
- Auto-Reset Function: Switches automatically based on pressure changes without manual intervention.
- SPDT Electrical Contact: Provides dependable switching for control circuits.
- Durable Construction: Rugged die-cast aluminum housing resists vibration and environmental wear.
- ON-OFF Indicator & Dual Scales: Quick visual status and measurement flexibility for easy setup and diagnostics.






