I have one of these that came with a car I purchased. I've only ever had it lit up, not actually used it but can't see why it wouldn't work.

It comes with a pressure sensor and a switch. It goes require a temp sensor, these are £32 delivered from SPA themselves

http://www.spa-uk.co.uk/design/produ...ils/?objid=666

There are a few marks on the surround but otherwise its perfect.

Full instructions can be found here, its quite a clever piece of kit

https://www.pegasusautoracing.com/pd...augeManual.pdf

£100ono