So far the new water pump has been working great. I decided to add a water level cutoff switch.
I used a two step switch so I would get a warning before the laser gets disabled.
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1348.jpg)
I wanted to mount it to the lid so I 3D printed a stalk to hold it at the right height
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1351.jpg)
With the extra wires I was going to need a bigger junction box but instead I just 3D printed a bubble top form the existing box.
First I thought about an aviation style connector…
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1352.jpg)
Then Im settled on an RJ45 so I could use a common network jumper cable
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1360.jpg)
I used half a coupler.
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1356.jpg)
Just crimped on some pins to get it connected.
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1358.jpg)
It fit pretty well since the coupler has a slight taper. A little glue will make it permanent
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1359.jpg)
And a matching end for the controller.
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1361.jpg)
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1362.jpg)
Plus a few extra parts……
![](https://es.pratt.edu/Commons/Images/laser%20v1/IMG_1365.jpg)