Also identified as the Honeywell S87C1014B

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

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

it provides reliable proportional modulation for hot water

Interchangeable Specs: Fully replaces the V47AB-4C

United Electric J21K-S150B Pressure Switch 322056-301 Also identified as the HoneywellThe 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