The ROSS® Pop-Up Indicator is a pneumatic energy release verification option device constructed for the industrial environment with a brass body and 1/8” NPT connection. The ROSS® Pop-Up Indicator offers 360° visibility and a redundant verification feature. By pushing on the red plunger, the operator can “feel” the presence of pressure and verify that the indicator is performing its sensing function. Standards suggest that machine design should include a method for verifying the release of energy after lockout.