Description
- ASIC technology delivers high accuracy and stability.
- Plug-and-play design with embedded ASIC microchip.
- Immune to pressure spikes, reducing false alarms.



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MSA 10106729 XCell O2 Sensor
MSA XCell Sensors are a breakthrough in sensor design, enabling faster response and shorter span calibrations, saving you time and money. ASIC (application-specific integrated circuit) technology inside of each sensor provides greater control and higher performance than other sensors on the market. Every XCell Sensor is built by MSA with a proprietary embedded ASIC microchip that drives the sensor and converts its output to a digital signal. This microchip is much more than a digital sensor; XCell Sensors perform real-time environmental corrections, provide plug-and-play capabilities and deliver greater RF immunity with higher overall performance. MSA XCell Sensors have a typical life of more than four years*, double the industry average. By miniaturizing sensor controlling electronics and placing them inside of the sensor itself, MSA XCell Sensors offer superior response time, stability, accuracy, and reliability. MSA is proud to offer XCell Sensors with:
Features and Specs:
Warranty: 3 years
With less time spent on calibration and bump tests, you save on calibration gas, maintenance costs
and in turn, save money. But most importantly, MSA’s industry-leading response times help to save lives.
The MSA 10106729 is a genuine XCell O2 (oxygen) replacement sensor for MSA gas monitors. It measures oxygen from 0 to 30% by volume at 0.1% resolution, with a typical response time of t(90) under 10 seconds. It fits the MSA ALTAIR 4X, 4XR, and 5X and is sold at Industrial Safety Products with free shipping.
The MSA 10106729 XCell O2 sensor fits the MSA ALTAIR 4X, ALTAIR 4XR, and ALTAIR 5X gas monitors. Confirm your instrument is one of these models before ordering, since it is a model-specific replacement oxygen sensor.
The MSA 10106729 XCell O2 sensor measures oxygen from 0 to 30% by volume (Vol) at 0.1% O2 resolution. Its factory alarm setpoints range from a minimum of 5% Vol to a maximum of 24% Vol, covering both oxygen-deficient and oxygen-enriched atmospheres.
Very fast — the MSA 10106729 has a typical response time of t(90) under 10 seconds, meaning it reaches 90% of the true oxygen reading in less than 10 seconds. This quick response helps workers detect oxygen deficiency or enrichment before entering a hazardous space.
The MSA 10106729 XCell O2 sensor has a typical life of more than 4 years — over 100% more life than other lead-based oxygen sensors — so you replace it far less often. It also carries a 3-year warranty. Longer sensor life means fewer replacements and lower lifetime cost.
ASIC (application-specific integrated circuit) is a proprietary microchip embedded inside every MSA XCell sensor, including the 10106729. It drives the sensor and converts its output to a digital signal, performs real-time environmental corrections, and provides plug-and-play capability with greater RF immunity. The result is higher accuracy and stability than conventional oxygen sensors.
Yes. The MSA 10106729 XCell O2 sensor is built to keep working down to –40 °C, where many other sensors freeze and stop reading. Combined with the onboard ASIC's real-time environmental corrections, this makes it well suited to cold-climate and outdoor gas detection.
No. MSA XCell sensors, including the 10106729 O2 sensor, are designed for false-alarm rejection and are immune to pressure spikes — so sudden pressure changes don't trigger a false oxygen alarm. This makes readings more dependable in real-world industrial and confined-space conditions.
Yes. The MSA 10106729 is a genuine MSA XCell O2 (oxygen) replacement sensor, available at Industrial Safety Products (industrialsafetyproducts.com) with free shipping. It is the correct oxygen sensor for MSA ALTAIR 4X, 4XR, and 5X monitors.
Because it lasts far longer and is more stable. The MSA 10106729 XCell O2 sensor delivers a typical life of more than 4 years — over 100% more than traditional lead-based oxygen sensors — plus false-alarm rejection (immune to pressure spikes), operation down to –40 °C, and an embedded ASIC that makes real-time environmental corrections for high accuracy. That means fewer replacements, fewer nuisance alarms, and reliable readings across temperature swings.