Is the dial liquid-filled

the C-165 is specifically designed for liquid line applications

ensuring total compatibility with HFC refrigerants such as R-134a

OEM Compatibility: Guaranteed to be identical to 1175521

Common Questions: Is the 39W98 compatible with all Lennox furnaces

Dwyer Instruments 1920-0 Pressure Switch 321702-401 Is the dial liquid-filledThe Dwyer 1920 0 Pressure Switch is a high precision differential pressure switch designed for critical HVAC and industrial process monitoring. Engineered for low pressure applications, this unit features an adjustable set point range of . 15" to . 55" w. c. with a deadband of approximately 0. 10" w. c. Its SPDT switch configuration allows for versatile wiring as either normally open or normally closed, making it a reliable choice for fan status