CO2 laser tube cooling water protection switch/plastic Laser water protector,Water flow switch and protector for laser engraver

CO2 laser tube cooling water protection switch/plastic Laser water protector,Water flow switch and protector for laser engraver This water sensor is to protect the laser tube, is the water pump is not working, the water sensor will detective, and shut show the laser machine, so the laser tube will not broken. this will use together with a water pump, insteading of a chiller