NRC D-05R Oxygen Sensor (R-22D)
- Buy 3 for $67.00 each and save 4%
- Buy 4 for $66.00 each and save 6%
- Buy 5 for $65.00 each and save 7%
NOTE: Because of our large unit volumes on this very popular sensor, we are able to offer bulk pricing discounts for either 3-Pack, 4-Pack or 5-Pack purchases of this specific model.
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.
NRC D-05R Oxygen Sensor (R-22D)
The D-05R, with a 3-pin Molex connector, is plug compatible with the AII PSR-11-39MD, and Maxtec MAX-305F sensors. This sensor is often referred to generically as the R-22D (an old Teledyne part number no longer manufactured) and also plug compatible with the R-22S. Manufactured in Germany by NRC International GmbH, their replacement sensors are individually tested and sealed in an air-tight can.
Rebreather compatibility: The NRC International D-05R 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.
NRC states their D-05R is compatible with the ISC Megalodon rebreathers. The ISC mV specification for their oxygen sensor is a tighter 9.5 mV to 13.0 mV on the low end as compared to the 8.0 mV to 13.0 mV specification of the NRC. The dimensions of the ISC sensor cap is slightly smaller than typical oxygen sensors in order to fit the tighter spaces in some of the ISC models and the D-05R cap size is also smaller to match the ISC version. We are aware that some rebreather divers are using the NRC D-05R sensor in their ISC rebreather, however this is a 3rd party sensor manufactured by NRC that is NOT approved by ISC for use in their rebreathers.
NRC states their D-05R is compatible with the rEvo and Mares rebreathers. The rEvo mV specification for their oxygen sensor is a tighter 9.0 mV to 13.0 mV on the low end as compared to the 8.0 mV to 13.0 mV specification of the NRC. We are aware that some rebreather divers are using the NRC D-05R sensor in their rEvo rebreathers, however this is a 3rd party sensor manufactured by NRC that is NOT approved by rEvo factory for use in their rebreathers.
Analyzer compatibility: The NRC International D-05R is used in the Cochran Lifeguard, Divesoft, DiveTek Oz, DiveNav cootwo, Mares EANx, and OxySpy analyzers.
See the Product Attachments tab on this page for PDF documentation of specifications and a technical drawing.
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 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.
Mixing Brands or Ages of Oxygen Sensors
Many electronically controlled rebreathers use an array of several sensors to alert the diver to the possibility of a failing sensor. The rebreather electronics will generate a warning indication when the sensors do not agree with each other. This is an important safety feature enabled by the multi-sensor array and the diver must respond immediately to sensor warnings.
If the sensor array contains a mix of brands or ages of sensors you may experience unexpected behavior of the sensor array that could result in misleading warnings. For example, installing a single new sensor in an array with much older sensors may cause sensor warnings simply because the new sensor responds faster than the older sensors. There are numerous other circumstances in which a mixture of brands or ages in an oxygen sensor array can cause otherwise acceptable sensors to generate a warning, solely due to ordinary differences between the sensors. You might see transient sensor warnings while the different sensors catch up to each other and auto calibrating rebreathers might even fail to calibrate in such situations.
Rebreather manufacturers each have specific recommendations regarding sensor replacement strategies for their rebreathers and we advise following their recommendations in order to avoid misleading warnings. If you are considering switching brands of sensors, it's tempting to want to just 'try one out' rather than replace the whole array, but we do not recommend mixing brands or ages of sensors.