We use air cylinders for many of our test fixtures. For low temprature testing, we insist on quality air driers and we adapt an external heating system to the cylinders. Usually something similar to wraping pipes to prevent them from freezing.
So far this has worked for us and other machine...
We've used DVT and Cognex systems at our shop.
Recently I introduced to General Vision's system. I've not yet worked with the hardware. But from the documentation it looks like a very simple system to set up and use.
http://general-vision.com/