The 3M Scott Safety cylinder pressure test indicator consists of a nickel plated brass boyd that incorporates a bleed valve, operated by rotating a finger screw.

The gauge mounted onto the top of this body is a 350 bar gauge with a luminous face.

The handwheel and liner enables the test gauge to be screwed into both 200 and 300 bar cylinder valves with an EN144-2 thread and allows the cylinder contents to be checked quickly and easily with minimum loss of pressure.