Siemens QVE1900U 1.25" SPDT Liquid Flow Switch 15A

The Siemens QVE1900U Liquid Flow Switch is a reliable tool that detects and controls the liquid flow in HVAC systems. This flow switch possesses a Single Pole Single Throw (SPST) and can control up to 15A, thus can be used in many instances. The QVE1900U operates based on the detection of the flow of the liquid in the system and then sends signals to other portions of the system to switch on or off when needed.