I am looking for a cam operated limit switch to pilot another valve. the switch will be used on the outside of a vehicle in -40 degrees C. I have found a few that would work but they only go down to 0 degrees C
Try Aro at http://www.AROZONE.com They have a 200 and 400 series limit valve which may work
You may try ARO (as Ray said) or you can try Mead they both make this style valve. However for mobile applications like you have, you want to use a valve which has a rubber boot over the actuator. You will destroy most valves in this application
I need a pneumatic limit switch also. It will need to sense the proximity of an air spring and has to operate in an explosion-ready environment safely. The solenoid operated type would be great, but specifications require pneumatic operation only.