Water blast - Water alarm sensor/switch on 60 Watt OMT

While I was working on a task I could hear water running noisily…
I immediately stopped the machine and the CW5000. It turned out that the hose for the sensor / water alarm switch had jumped off.
It is the only hose connection on the entire machine that is not secured with a regular metal tension band but with a cable tie.
Here it becomes clear again that the chain is only as strong as the weakest chain link.
I spent a few hours cleaning up and repairing the damage, but luckily I didn’t have to invest in a new tube. Accident occurred between material changes, i.e. the laser was not in action.

Friends, check your hose connections!

Bernd, thank you for the PSA. I too learned early on never to use tie straps, only spring clips (like the one in the far right of your picture). My “EVENT” was not as severe as yours, but a wakeup call none the less.

I’m hearing of this across forums and groups almost twice a week.
I use the rack and pinion style hose clamps even better.


It’s just particularly unfortunate because it looks like the water alarm was retrofitted or came on at the end as if it had been forgotten…and then there were no metal clamps left.
However, it must also be said that I am generally very satisfied with my machine.

If you have a 5000 series chiller, use it’s error mechanism. Not only flow, but high/low temperature limits can also be programmed.

Pretty simple to wire them up…


I use temperature control on my CW5000 and the standard pressure control (but it is not connected electrically to the laser machine).
It went so fast yesterday that I didn’t even manage to register whether the CW5000 or the laser machine’s own pressure sensor, whether it has turned off the laser or not or triggered an alarm.
I guess the biggest or most dangerous problem could be “minor” leaks. The reaction time before the safety elements kick in is unluckily long and all water above the reservoir (the contents of the tube) will always run out and or into the machine. Fortunately, no water ran into the electrical area of the machine, the partition wall kept tight.