Constructed from nickel plated brass, with 1 Female Socket CEJN type coupling and 1 Male coupling to allow quick and easy interfacing with the airline hose. The medium pressure warning whistle allows an inline warning to be added to the system to notify the user that the airline pressure is dropping. The activation pressure of the whistle is 3 – 4 bar.
The 3M™ medium pressure warning whistle is specifically designed to provide a warning to the user of a drop in airline pressure. It would traditionally be placed at the end of the airline just before the connection of the breathing apparatus.