McDonnell & Miller 42S Controller 30067439-890 The UEi PDT550 Digital Pocket

The UEi PDT550 Digital Pocket Thermometer is a precision-engineered diagnostic tool designed for high-stakes HVAC/R system servicing and temperature-critical environmental inspections

the element should be "snaked" horizontally across the downstream side of the heating coil or upstream of the cooling coil

additional PVC fittings or plugs may be required depending on your specific installation requirements

and pool heaters with a capacity of up to 240

keep the container tightly sealed until use

McDonnell & Miller 42S Controller 30067439-890 The UEi PDT550 Digital PocketThe McDonnell & Miller 42S Controller (Part Number 129302) is a critical float operated combination low water cut off (LWCO) and pump controller designed for residential, commercial, and industrial steam boilers. Engineered for systems with a separate water column, this steam boiler water level control features dual SPST snap action switches that provide reliable automatic reset functionality. The 129302 pump controller handles a maximum operating