If the output voltage remains pinned at 0V or 10V regardless of actual conditions

the HH18HA191 is commonly utilized in window units and PTACs as a safety limit or thermostat-linked control switch

It is a direct cross-reference for Honeywell Q340A and Johnson Controls K19 series

this unit utilizes the BOA concentric locking collar to ensure a 360-degree grip on the shaft

Designed for natural gas service (LP conversion capable with appropriate kits)

United Electric J21K-254 Pressure Switch R-22 If the output voltage remainsThe United Electric J21K 254 Pressure Switch is an essential component for demanding HVACR and industrial filtration applications, specifically designed to monitor differential pressure with high precision. This 0 90# SPDT NEMA1 Pressure Sw. features opposing metal bellows that accurately sense the pressure delta between two points, making it ideal for differential pressure switch hvac tasks such as monitoring chiller oil pressure, filter status