this is designed for specific Parker valve series

Key Benefits OEM Compatibility: Guaranteed drop-in replacement for Heil Quaker

The Normally Open configuration means the internal contacts remain open until the draft inducer creates sufficient negative pressure to close the circuit

reducing HVAC system downtime

Maintaining a functional AC compressor overload is essential for protecting the system's most expensive component from permanent damage during low voltage or refrigerant slugs

Trane SEN2128 Sensor R-410A this is designed for specificThe Trane SEN2128 is a specialized 2. 2 inch optical liquid level sensor designed for precision refrigerant management in high tonnage Centravac chillers. This critical component utilizes an infrared light source and phototransistor to accurately monitor the presence of liquid refrigerant within the evaporator or condenser shells, ensuring the compressor operates within safe parameters. Engineered for the high pressure environment of a Trane CVHE,