Specialty O2 Sensors for Analyzers
† Although we make every effort to keep all these sensors in stock, because of relatively low unit sales volumes for some of the more obscure models, they can occasionally have a significant lead time in order for Dive Gear Express to be able to offer the freshest sensor available.
Factory fresh, our 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.
Specialty O2 Sensors for Analyzers
- See chart below to find the sensor you need
- Choose from a wide selection of sensors for diving gas analyzers
- In stock sensors are "factory fresh" for longest performance
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. 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.
For rebreather replacement sensors please visit Rebreather Sensors.
- The PSR-11-37-D2 will work in the Nuvair O2 QuickStick analyzer.
- The PSR-11-37-D2-1 will work in the Teledyne MixChek, and Nuvair Pro Trimix analyzers.
- The PSR-11-37-D3 will work in the Analox Mini O2 & O2-II, OMS Oxygen Analyzer (Analox), ScubaPro (Analox) - **NOT for the Analox O2EII.
- The PSR-11-37-D4 will work in the OxyCheq Expedition, MSA MiniOx IV, Abysmal TekChek, and RC Dive Spectrum Pro-1 analyzers.
- The PSR-11-37-52D will work in the Analox O2EII analyzer.
- The PSR-11-39-ATA will work in the Analox ATA Trimix analyzer.
- The PSR-11-39-JD (R-17D), with the 3.5mm Mini-Jack connector, is used in Dive Rite VTI, Mini-Ox brand, Spectrum brand, Vandagraph VN202, OxyCheq El Cheapo/Expedition-X, and Teledyne AD300/MD300 analyzers. This sensor is often referred to generically as the R-17D (an old Teledyne part number no longer manufactured) and also plug compatible with the R-17S.
- The PSR-11-39-JD1 will work in the Maxtec OM25AE analyzer.
- The PSR-11-39-MD5 with the 3-pin Molex connector, is used in the OMS Professional Dive Oxygen Analyzer (Peanut).
- The PSR-11-39-MD (R-22D) with the 3-pin Molex connector is a diving grade version of the PSR-11-39MNB. This sensor includes a hydrophobic membrane and 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 type sensors. Although slower in response time, many divers prefer using this sensor in analyzers for it's resistance to moisture.
- The PSR-11-39-MNB (R-22S) with the 3-pin Molex connector, this sensor is often referred to generically as the R-22S and also plug compatible with the R-22D. Offering a faster response time than R-22D type sensors, the sensor is used in the Cochran Lifeguard, Divesoft, DiveTek Oz, DiveNav cootwo, Mares EANx, and OxySpy analyzers.
The AII-11-75-PO2D for the Analytical Industries Palm 'D' oxygen analyzer, the AII-OSV-22-AF for the Analytical Industries Palm 'CO' carbon monoxide analyzer, the AII-11-60-D for the AII-3000-A Oxygen Analyzer, and the AII-11-75D oxygen sensor for the Trumix 4001 Trimix analyzer are listed as separate products.
The Divesoft 22S for the Divesoft branded gas analyzers is also listed as a separate product. .
See PRODUCT DOCUMENTS tab for additional cross reference documentation from 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.
The R-22 and R-17 type oxygen sensors in diving
Teledyne Analytical, a early pioneer in the development of galvanic oxygen sensors, manufactures a variety of sensors for different applications. The R-22 models are all characterized by the same physical dimensions and 3-pin Molex connector; the R-17 models are similar but with an 3.5 mm mini-jack connector. They output approximately 10 mV in ordinary air at one atmosphere (i.e. 0.21 ATA partial pressure of oxygen) and room temperature with an average lifespan of about 36 months. In elevated oxygen pressures the mV output is much higher and the lifespan is much shorter. The various models differ internally in order to support specific applications such as automotive (R-22A/R-17A), medical (R-22MED/R-17MED), and gas analyzers (R-22S/R-17S). Early versions of modern rebreather designs incorporating oxygen sensors used those models (because it was what was available), but the sensors are sensitive to the high levels of humidity found in rebreather loops. Teledyne later offered "D" versions for the diving market (R-22D/R-17D) that improved their resistance to moisture.
In the 2000's, Teledyne Analytical had to defend the sensors in several (frivolous?) lawsuits associated with rebreather fatalities. Although the sensors were never found to be at fault, Teledyne ceased manufacture of the diving grade models because the litigation costs to defend the sensors exceeded the value of the very small rebreather sensor market at the time. Several other competing manufacturers began to offer plug-compatible replacements for the now discontinued R-22D/R-17D models. Over time those other manufacturers have made significant improvements to the original design, although the physical and connector specifications have remained the same. They are often still generically referred to as "R-22D type compatible" or "R-17D type compatible" after the original Teledyne model number, although Teledyne has not resumed branded production of diving grade sensors.
The primary difference between the "S" type sensor and the "D" type sensor is the presence of a hydrophobic membrane on the face of the diving grade sensor. The membrane improves resistance to moisture, but slows the response of the sensor to changes in oxygen partial pressures by several seconds. In practice, for use in diving gas analyzer applications the slightly slower response time of diving grade sensors is little consequence with the benefit being the design is more resistant to moisture found on the face of tank valves. If the diver or fill station operator fails to wipe or blow away any moisture present on the valve outlet, that moisture can enter the stream of gas being analyzed and affect the accuracy of the analysis. Some prefer to use the D type sensors even in analyzers because of their resistance to moisture, others prefer the S type sensors for their slightly faster response time in analyzers - especially in frequent use applications. Both types will work in gas analyzers but the S type must never be used in rebreathers.