All port retainer rings from Broadley-James Corporation are 316L stainless steel. Housings and DO sensors come with an attached retainer ring, however, the ring may need to be replaced due to loss or damage.

Since 1999, Broadley-James Corporation has been supplying housings and DO, sensors with a slightly taller retainer ring than in the past. The taller ring and additional threads were necessary to be compatible with the new safety ports offered by B. Braun Biotech and others. These taller rings will fit any old or new port.

This new port retainer ring has a smoother design to provide a more ergonomic grip. This is an advantage for individuals with smaller hands. The rounded edges are cleaner and will not catch or tear a glove or hand. It utilizes the same threads as the standard retainer ring to fit any 25 mm port. This beveled retainer ring can be ordered separately or as an upgrade on any 25 mm housing or DO sensor.

This port retainer ring will fit any 19 mm port. The threads on the 19 mm port are finer than those of a 25mm port. The ring is made of 316L stainless steel with nickel-teflon coated threads to prevent galling.