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.

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

  • The Analytical brand PSR-11-39-MD, is by far the 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 PSR-11-39-MD is NOT compatible with the ISC Megalodon or the Mares rEvo.
  • The Poseidon brand 6010-206 oxygen sensor, also manufactured by Analytical, is used in both the MKVI and Se7en rebreathers and is the same as the PSR-11-39-MD except for the label.
  • The Mares rEvo brand CR22D oxygen sensor, manufactured 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.

Other replacement sensors by Analytical 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-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 homebuilt rebreathers.
  • The PSR-11-39-XD is used in the SF2 rebreather.

Factory fresh, our Analytical brand oxygen sensors are never more than four months old when we ship to you. Due to the unique nature of the product, this diving grade oxygen sensor is NON-RETURNABLE. Your complete satisfaction is our goal, so please consider carefully before purchase.

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, verification and validation of specific oxygen sensors for use in rebreather applications is the responsibility of the equipment user and/or original equipment manufacturer.

17 Items

per page
Set Descending Direction
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 NOT 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 rebreather 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. The nature of how galvanic oxygen sensors are manufactured and their shelf life further creates limits on the near term production capacity... it's not easy to rapidly ramp up production to make significantly more or make them significantly faster.

As of August 2020, the manufacturing supply chain for oxygen sensors seems to be running about 90 days behind the demand and experts we have consulted believe the lead times will not improve through the rest of the year. Globally, there may yet be some remaining stock in the retail supply pipeline but it's being rapidly exhausted. We have plenty of purchase orders in place with our suppliers and we are receiving some limited quantities, but not nearly enough to satisfy demand at the retail level. Like toilet paper, we suspect there is also some 'panic buying' of diving grade oxygen sensors... making availability even worse. Unlike toilet paper, oxygen sensors have a relatively short shelf life and buying 'extra' oxygen sensors without an immediate need is expensive and wasteful.

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.

Many manufacturers do not wish to deal with global retail sales of oxygen sensors and publish generic sensor specifications suitable for their units (typically an R-22 or R-17 type sensor), allowing the market to determine supply and price. We are receiving limited quantities our popular generic PSR-11-39-MD (R-22D compatible) sensor from Analytical Industries on an occasional basis. Some manufacturers prefer to tightly control sensor availability, stating only their own branded specialty version oxygen sensor is approved for use in their unit. In particular manufacturer approved oxygen sensors for the APD, ISC, and rEVO rebreathers are in very short supply. We are also receiving very limited quantities of PSR-11-39 versions for those sensors as well, but historically they have NOT been approved by the rebreather manufacturers. Regardless, verification and validation of specific oxygen sensors is the responsibility of the equipment user and/or original equipment manufacturer. If you have questions about oxygen sensor compatibility or availability, you should contact the manufacturer of the rebreather or analyzer for the best and most up-to-date advice.

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, or have a total age of over 18 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.





     
Message Icon