Originally Posted by
kenrbass
If there are more on the machine, you may can get some info off of them. The main difference is npn or pnp. Then thread size and voltage. Most will work on 24v dc, but I have seen some that will function as low as 5v. Brown should be +voltage. Blue should be ground, Black is the output and it can supply voltage or ground when activated. You need to know what the old one did and why. Honestly they are so cheap, you can order one of each with the correct thread size for mounting.