This is a stand alone sensor.
You can set the value of pre-cooling and post time after a laser work the pump is going to circulate the water until shut off.
When you turn on the machine, the pump starts to cool your loop. When the set time is reached a green LED is lit and you know its ready to use.
When you turn off the machine, the timer keeps running the pump for same amount of time to cool down the laser tube safely.
This product contains
One timer module
Two cables with LED´s, 50cm each to easy be fastened in a 8mm hole anywhere.
Power cable to 12V (not included)
Instructions how to connect your pump(s). Can handle 12 to 240VAC