Description
The A.J. Antunes JD-2-RED is a versatile, field-proven pressure switch engineered for air differential, vacuum, and pressure sensing applications in commercial and industrial HVAC systems. With an operating range of .1 to 24 inches water column (“wc), this switch delivers accurate, repeatable performance across a wide span of pressure conditions — making it an ideal choice for air handling units, exhaust fans, filter monitoring, blower proving, and combustion air verification.
The SPDT (Single-Pole, Double-Throw) switching action provides both normally open and normally closed circuit paths, giving installers maximum wiring flexibility for control and alarm circuits. The auto reset function eliminates the need for manual intervention after a pressure event, restoring normal operation automatically once conditions return to the set point. The 1/8” NPT port connection ensures compatibility with standard pneumatic fittings and tubing commonly found in commercial HVAC installations.
Key Features
- Pressure range: .1 to 24″ water column (“wc)
- Switch type: SPDT (Single-Pole, Double-Throw)
- Port connection: 1/8″ NPT
- Auto reset operation — no manual reset required
- Suitable for air differential, vacuum, and positive pressure sensing
- Compact, durable construction for reliable long-term service
- Ideal for filter status monitoring, blower proving, and combustion air verification
Typical Applications
- Air handling units and rooftop units
- Exhaust and supply fan proving
- Filter differential pressure monitoring
- Combustion air pressure verification
- Vacuum and positive pressure control circuits
Why Choose the A.J. Antunes JD-2-RED?
A.J. Antunes has built a strong reputation for precision sensing and switching products used in demanding commercial environments. The JD-2-RED combines a broad sensing range, auto reset convenience, and flexible SPDT switching into a compact, easy-to-install package — reducing service calls and simplifying system commissioning.
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