Cloudray Water Flow Switch Sensor Suit with Pagoda Head Caliber: 10mm HT-30 for Protecting CO2 Laser Tube

Make sure you purchase the 10mm, they work perfectly with the tubing in the Laser machine already. My original sensor was leaking extremely bad. I don't see any way this could cause a leak in the future. Pretty simple change out and worked great (I had to remove the "Y" connector and place this sensor in line on the inlet side of the hose before it goes to the laser tube). There is no polarity so you can connect the two wires any which way. Get yourself some 13mm Spring Band Type Hose Clamps and ditch the zip ties! While you're at it change out the tubing as well with some new Silicone Tubing 8mm ID x 12mm OD.

Easy to I stall and works great. Will nt let me run my laser with out water on.

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I bought a chinese red/black machine on ebay 5 years ago. I saw water leaking out of the rear of the machine. I bought this water sensor to replace the broken one and it WORKED PEFECT. Just make sure your hoses are on snug and you use either hose clamps or zip ties. I only had zip ties and they are holding nice and strong, dry as a bone. Thanks!