The two-out-of-three device has three sets of minimum pressure signal outputs, suitable for important auxiliary accessories of Ex p motor purging system.

The system has three sets of built-in pressure sensors, which detect three pressure monitoring points inside the motor in real time, and can accurately control the pressure status of 

the motor cavity.

There are three sets of red and green alarm indicators on the outside of the equipment. You can visually see whether the pressure in the motor cavity is too low on site.

Pressure changes typically occur during sudden starts of large rotating machines, but can also be caused by changes in operating temperature. The system is specifically designed to 

maintain stable internal pressure within the motor housing.

*There are a number of system variants available covering alternative alarm output connections - see specifications and downloads for further details.