# How to replace a broken proximity sensor on a CO2 laser

- Link: https://createdworkshop.com/videos/how-to-replace-a-broken-proximity-sensor-on-a-co2-laser
- Published: 2024-11-12T14:00:45-06:00
- Author: 

The proximity sensor on my Monport 80W CO2 laser broke, and replacing it took me
about 25 to 30 minutes with a part that cost around $10. Until the new sensor showed
up, I disabled homing on the Y axis so I could keep using the laser.

I show how I figured out which replacement sensor to get and how I wired it in, 
including tracing the wires through the channels inside the laser cabinet. Then 
I pull the old switch, install the new one and match up the wire colors so everything
works the way it should.

I used a PL-05N limit switch as the replacement. I bought it on Amazon, and it turned
out to be a Fotek. Putting everything back together and testing it was easy, and
homing worked again.

If you’re comfortable doing a little DIY, this is a pretty straightforward repair,
and you shouldn’t need to pay someone to fix it for you.