O2 Sensors for Rebreathers

The global pandemic has caused diving grade oxygen sensors to be in limited supply because manufacturers have dedicated much of their production to medical versions. For more information please read our TekTip titled Oxygen Sensor Availability During Global Pandemic.

Dive Gear Express stocks replacement oxygen sensors for rebreather applications branded by Analytical Industries, NRC International, Poseidon, and rEvo.

For hand held gas analyzer replacement sensors please visit Analyzer Sensors.


  • The Analytical brand PSR-11-39-MD, is our most popular 'R-22D' style with Molex 3-pin connector, used in the Dive Rite O2ptima, Poseidon Se7en & Discovery VI, Hollis Prism2 & Explorer MK2, KISS Classic/GEM and upgraded KISS Sport, Hammerhead, Liberty, SubGravity and many other brands of rebreathers.
  • The Poseidon brand 6010-206 oxygen sensor, also an R-22D manufactured in the US by Analytical, is used in both the MKVI, Se7en (and +) rebreathers and is the same as the PSR-11-39-MD except for the label.
  • The Mares rEvo brand CR22D oxygen sensor, manufactured in the UK by Vandagraph, is used in all the Mares rEvo & Horizon model rebreathers and is the only sensor approved by the Bruges factory for use in those models.

Replacement sensors manufactured in the US by Analytical Industries Inc for rebreathers include:

  • The PSR-11-15-2D is used in the Draeger Oxy Gauge and Dolphin rebreathers.
  • The PSR-11-33-NM1, depending on the revision level of the electronics, is used in Biomarine MK15/MK15.5/CCR-1000 rebreathers, and Steam Machines SM1000/SM1600 rebreathers.
  • The PSR-11-39-JD is used in the Hollis Explorer MK1 and VR Sentinel rebreathers.
  • The PSR-11-39-JJ is used in the JJ rebreather.
  • The PSR-11-39-MD is used in the Dive Rite O2ptima, Poseidon Se7en (and +) & Discovery VI, Hollis Prism2 & Explorer MK2, KISS Classic/GEM and upgraded KISS Sport, Hammerhead, Liberty, SubGravity and many other brands of rebreathers.
  • The PSR-11-39-MD1, depending on the revision level of the electronics, is used in Biomarine MK15/MK15.5/CCR-1000 rebreathers, and Steam Machines SM1000/SM1600 rebreathers.
  • The PSR-11-39-MDSX or PSR-11-39-MDSX1, depending on the revision level of the electronics is used in the Submatix SCR 100 rebreather.
  • The PSR-11-39-MEG is used in the ISC Megalodon rebreathers.
  • The PSR-11-39-MHD is a special version of the PSR-11-39-MD which provides a slightly higher mV range.
  • The PSR-11-39-REVO is used in the Mares rEvo and Mares Horizon rebreathers.
  • The PSR-11-39-SMB is used in the iQsub XCCR, APD Inspiration and APD Evolution rebreathers.
  • The PSR-11-39-TME is used in some homebuild rebreathers.
  • The PSR-11-39-XD is used in the SF2 rebreather.

Replacement sensors manufactured in Germany by NRC International GmbH for rebreathers include:

  • The NRC D-05R is used in the Dive Rite O2ptima, Poseidon Se7en & Discovery VI, Hollis Prism2 & Explorer MK2, KISS Classic/GEM and upgraded KISS Sport, Hammerhead, Liberty, SubGravity and many other brands of rebreathers.
  • The NRC D-01N is used in the Hollis Explorer MK1 and VR Sentinel rebreathers.
  • The NRC-D-05JJ is used in the JJ rebreather.

Many rebreather manufacturers do not wish to deal with global retail sales of oxygen sensors and publish generic sensor specifications suitable for their units, allowing the market to determine supply and price. Some rebreather manufacturers prefer to tightly control sensor availability, stating only their own branded sensor is approved for use in their unit. Regardless, Dive Gear Express has not done any verification or validation of rebreather oxygen sensors and disclaims any responsibility and liability for the use of oxygen sensors in rebreather applications. Verification and validation of specific oxygen sensors for use in rebreather applications is the responsibility of the equipment user and/or original equipment manufacturer.

Oxygen sensors are one of the very few items on our website that are NON-RETURNABLE., because we can't know with absolute certainty how they were handled once delivered. Additional shipping and handling of the return can also degrade performance. They are critical to safety in diving, and our customers have a reasonable expectation of receiving as factory fresh a product as possible from Dive Gear Express. Your complete satisfaction is our goal, so please consider carefully before purchase.

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Tek Tip Warning Image WARNING

Dive Gear Express has not done any verification or validation of rebreather oxygen sensors and disclaims any responsibility and liability for the use of oxygen sensors in rebreather applications. Verification and validation of specific oxygen sensors for use in rebreather applications is the responsibility of the equipment user and/or original equipment manufacturer.

Oxygen sensors are one of the very few items on our website that are NON-RETURNABLE., because we can't know with absolute certainty how they were handled once delivered. Additional shipping and handling of the return can also degrade performance. They are critical to safety in diving, and our customers have a reasonable expectation of receiving as factory fresh a product as possible from Dive Gear Express. Your complete satisfaction is our goal, so please consider carefully before purchase.

Oxygen Sensor Availability During Global Pandemic

Diving grade oxygen sensors are in limited supply because the manufacturers have dedicated much of their production to medical versions for ventilators. Some oxygen sensor manufacturers have also experienced production disruptions due to social distancing and quarantine restrictions. As of early 2021, the manufacturing supply chain for oxygen sensors has begun to catch up with demand, but availability still remains a concern. We have plenty of purchase orders in place with our suppliers and we are periodically receiving inventory, but not always enough to satisfy demand at the retail level.

If our website indicates Out-of-Stock or On Order for a particular model oxygen sensor, it means we don't have any now and don't know for certain when we will get more. Lacking reliable information on availability, we will not accept "pre-orders" for oxygen sensors. You can use the "Notify me when this product is in stock" link on the product page to get an e-mail notice when more sensors become available. When you receive the e-mail notice, you should act quickly to order as we typically sell out within a few hours of sending the notice.

Oxygen sensor service life can vary considerably depending on usage, oxygen exposure and environmental factors. In our opinion, there is not ANY in-the-field test or dive procedure that will properly validate a oxygen sensor for use beyond it's expiration date. As oxygen sensors reach end-of-life they can become unpredictable, causing problems that are sometimes difficult to diagnose. The expiration date printed on some sensors is not a guarantee they can remain in-service until that date; it is a caution against use after that date.

Because oxygen sensors are so critical to the operational safety of rebreathers, we recommend discontinuing the use of oxygen sensors in rebreather diving applications that have been in-service over 12 months. While you might be tempted to 'extend' the life of your sensors to continue to dive, please always follow the manufacturer's recommendations for sensor handling and replacement.

For more information, see our article on Oxygen Sensor Handling Best Practices.





     
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