it provides a reliable seal at differential pressures up to 15 PSI

the "U" designation typically refers to retail or universal packaging

Key Benefits Double Diaphragm Technology: Eliminates inlet pressure effects for superior regulation accuracy

and integrated furnace controls

It is recommended to retain your existing #4-40 mounting screws or order the T-4002-617 screw kit if replacements are needed

Ranco O12-1502 Pressure Control Els PW 17895 it provides a reliable sealThe Ranco O12 1502 is a professional grade dual pressure control engineered for heavy duty commercial refrigeration and HVAC applications. This SPST pressure switch consolidates high side protection and low side cycling into a single NEMA 1 enclosure, streamlining installation and improving system reliability. The low pressure side features an adjustable cut in range of 12" Hg to 50 PSI with a 5 to 35 PSI differential, while the high pressure side