Trane SWT0977 SPST Pressure Switch

The Trane SWT0977 SPST pressure in Trane HVAC equipment. Records the pressure levels of the system it and depending an initial pressure range engages or disengages an electrical circuit. This helps in regulating some activities, including switching the blower to the furnace when the airflow selection is low or halting the compressor when the pressure is high Their size is 3.9 x 4.2inch, This is a tiny and light switch that is capable of operating current of 3A. The operating temperature range is between -40 and 90 degrees Fahrenheit and, depending on the units used, changes in pressure as slight as 0.01” WC can be measured.