as well as sub-critical CO2 (R-744) applications

providing reliable pilot duty control for HVAC safety circuits and industrial ventilation systems

By ensuring exact motor alignment and maintaining factory clearances

eliminating the risk of mismatched impedance or connector pinouts

United Electric J21K-S150B Pressure Switch 322056-301 as well as sub-critical CO2The United Electric J21K S150B Pressure Switch is an industrial grade differential control designed for precision monitoring in HVAC R and process systems. Engineered with welded 316L stainless steel bellows, this model provides high sensitivity detection for filter status monitoring, proof of flow, and chiller protection. The J21K S150B features a field adjustable range of 0 to 40 PSID, allowing technicians to fine tune setpoints via an internal red