The penny drops.
This is to be a word next to the red warning light, so that when it lights up, nobody scratches their head, what does that mean? It's something succinct to go with the red light.
Thanks for all the input. We do have a name for it adn för us and our customers ease we just called it Airsensor. The question here was for a small warning sign and We have got loads of replies on that too.
I will show this thread at work tomorrow and see that my duprtvisor says about the suggestions. Once again thankss to all that has helped us with this matter.