Hvac Float Switch Function: SS2 water level switch is used in HVAC systems to detect condensation water overflow; It detects blockage of air conditioning condensate water drain pipe and shuts down the system to prevent overflowing water from damaging floors, walls, and ceilings Working Principle: the float switch HVAC can be connected to a VCC or thermostat line; It is an NC type (normally closed) switch: when no water overflows, the float stays at the bottom of the switch, the switch closes the loop and outputs an ON signal; When the water overflows, the buoyancy of the float rises, the trigger switch turns on, and the output OFF signal turns off Specifications: switch type NC ( normally closed) , material PVC, operating temperature -20 - + 80, wire length 5.8ft, switching voltage Max; 200VDC; Switching current Max; 1 A contact rating Maximum 10W Easy to Install: this float switch HVAC is easy to install, all you need to do is install the 3/ 4 adapter that comes with the AC float switch on the auxiliary drain outlet of the main panel and connect the 5.8ft of wire to VCC or thermostat wire Easy to Clean: the transparent material allows you to see what's going on inside; The float switch is equipped with a removable cover; When you use it for some time, you can remove it for cleaning to and normal function Colour:Photo Color Material:Plastic Package Contents: 1x SS2 Float Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.