presostat

"Unlatch the safety cover on your belt and press the pressure switch."

More commonly, a pressure switch indicates if the battery is fully charged.

Not a likely candidate for some sort of pressure switch; he pulled himself up and over the rail.

Differential pressure switches can be placed on the filter to determine if it is dirty.

These types of sensors are also known as a pressure switch.

This pressure switch operates the same way as the recessed button.

The use of a pressure switch and relay are recommended and required.

It's probably a two-way pressure switch of some kind.

"He said there was a pressure switch, set for eighty meters."

This was due to an incorrect specification of a pressure switch.