When replacing an existing McDonnell & Miller probe

including the 27W model

Key Benefits Universal Compatibility: Serves as a direct replacement for 30686409-004 and JC-5310 pneumatic gauges

as a direct York OEM part

Key Benefits for HVAC Professionals: Universal Compatibility: Serves as a versatile HVAC replacement part for legacy PECO TA and TB series controllers

Ranco O12-1549 Pressure Control Els PW 17895 When replacing an existing McDonnellThe Ranco O12 1549 Dual Pressure Control is a versatile, commercial grade safety and operational switch designed for HVACR refrigeration units. This dual function control manages both low pressure cut out and high pressure safety limits within a single NEMA 1 enclosure. The low pressure side features a range of 10" Hg to 100 PSI with an adjustable differential of 10 to 40 PSI, while the high pressure side operates from 150 to 450 PSI with a fixed 65