When you're out in the field and a furnace or air handler blower is dead

Key Benefits: Universal Compatibility: Engineered as a direct replacement or retrofit for OEM ignition controls and diverse gas-fired appliances

Broad ICP Compatibility: Direct replacement for multiple Heil Quaker limit control iterations

Constructed from high-dielectric materials

Dwyer Instruments A3000-00 Pressure Switch/Gage 318518-761 When you're out in theThe Dwyer Instruments A3000 00 is an industry standard Photohelic pressure switch gage designed for precise differential pressure control in critical HVACR environments. This 2 in 1 instrument integrates a time proven Magnehelic gage with high performance low high pressure switches to monitor and regulate positive, negative, or differential pressures. Engineered for air and non combustible gases, it provides a 0 0. 25" w. c. range with a 4" dial face