⚛️ Description: This is a rubber dome fitting made to be used with the FD-O2BOX gas detectors when testing gas cylinders, particularly to check SCUBA tank cylinders. The dome fits over the blue T-piece that comes standard.
👫 Instructions: Slide the dome onto the T-piece. The dome has a small orifice inlet acting to regulate the high pressure released from the cylinder valve so as not to damage the sensor.