O2 Sensors for CCR

We are a high volume retailer of AI brand diving sensors, assuring that replacement sensors ordered from Dive Gear Express are always among the freshest available.

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

  • The PSR-11-39-MD, is by far the most popular, used in the O2ptima, Prism2, Hollis Explorer MK2, KISS Classic/GEM and upgraded KISS Sport, Hammerhead, Megalodon, Poseidon, rEvo, Liberty and many other brands of rebreathers.
  • The PSR-11-39-JD is used in the Hollis Explorer MK1 and VR Sentinel rebreathers.
  • The PSR-11-39-APD is used in the APD Inspiration and Evolution rebreathers.
  • The PSR-11-39-JJ is used in the JJ CCR.
  • 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-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-XD is used in the SF2 rebreather.
  • The Poseidon brand Sensor is used for both the MKVI and Se7en rebreathers and is the same as the PSR-11-39-MD except for the label.
  • 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-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-TME is used in some homebuilt rebreathers.

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 supply and price, stating only their own private label sensor is approved for use in their unit. In our experience there is an Analytical Industries diving grade oxygen sensor PSR model for nearly every rebreather currently being sold for recreational diving, but some rebreather manufacturers do not allow us to publish a cross reference for their units. 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.

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Oxygen Sensor Life in Rebreathers

When any new oxygen sensor is removed from the sealed package, it can take anywhere from a few minutes to several hours for it to acclimate and the millivolt output to stabilize. We recommend waiting as long as practical before calibrating your rebreather with a freshly opened sensor. Also, as oxygen sensors reach end-of-life they can become unpredictable, causing problems that are sometimes difficult to diagnose. Because oxygen sensors are so critical to the operational safety of rebreathers, we recommend discontinuing the use of oxygen sensors that have been in-service over 12 months, or have a total age of over 18 months.

Three conditions are particularly notable for drastically shortening the life of an oxygen sensor, regardless of brand.

  • Impact - Inside the oxygen sensor are tiny wires and seals that are very fragile. Sensors subjected to g-force shocks explains why a new sensor will come out of the package DOA, reading zero millivolts (broken wire) or with erratic readings (ruptured seal).
  • Heat - The warmer the sensor, the shorter the life. That can happen during shipping or storage, but can also happen when the rebreather sits in the sun and gets very hot.
  • Prolonged Oxygen Exposure - Leaving elevated oxygen mixtures in the breathing loop, which often happens following a calibration, will drastically reduce the life of a sensor. Heavy use of your rebreather will also shorten the life of the sensor.

Click Here to read Oxygen Sensor Handling - Best Practices

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.



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