Cleveland Controls NS2-503-00 Pressure Switch 319825-402 Use a multimeter to check

Use a multimeter to check for continuity across the load terminals after the control circuit is energized

Built for harsh boiler environments

Field Adjustability: Features a convertible range adjuster and an adjustable differential for fine-tuning system cycling

HEP-GA251 is the direct replacement for HUM1725051

Can I use this for 230V applications

Cleveland Controls NS2-503-00 Pressure Switch 319825-402 Use a multimeter to checkThe Cleveland Controls NS2 0503 00 is a high performance narrow differential air pressure sensing switch designed for reliable HVAC furnace draft monitoring and proving airflow in residential and light commercial applications. Engineered with a fixed set point of 0. 96" W. C., this diaphragm operated switch ensures precise combustion blower safety by detecting pressure drops or venting obstructions. The NS2 0503 00 features a rugged polycarbonate