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Ships within 48 hours · Estimated delivery Sep 27 - Oct 2
this switch offers a direct-fit solution that matches factory electrical specs and pneumatic connections
Proper furnace pressure switch troubleshooting is essential
providing a durable
a specific linkage kit (such as the AV-611) may be required depending on the valve body series
United Electric J21K-140 Pressure Switch 321702-401 this switch offers a direct-fitThe United Electric J21K 140 Pressure Switch is a high sensitivity differential pressure switch engineered for precise monitoring in demanding HVAC and industrial environments. This unit utilizes opposing brass bellows to accurately detect the pressure drop across filters, coils, or heat exchangers. With an adjustable range of 0 to 6 PSID and a tight deadband of 0. 1 to 0. 4 PSI, it provides the low end resolution required for airflow proving and high
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