MST A-O2 Series Precise O2 Sensor For Automobile Exhaust And Emission

Document Purpose The purpose of this document is to present the performance specification of the 4OXV oxygen sensor. This document should be used in conjunction with the 4OXV Characterisation Note, Operating Principles (OP02) and the Product Safety Datasheet (PSDS 4). The data provided in this document are valid at 20°C, 50% RH and 1013 mBar for 3 months from the date of sensor manufacture. For guidance on sensor performance outside of these limits, please refer to the 4OXV Characterisation Note. Output signal can drift below the lower limit over time. For guidance on the safe use of the sensor, please refer to the Operating Principles OP02

In August of 2015 we made the business decision to use the City 4OXV sensor in the majority of our BW product line. As such we started to transition that sensor in and replace the Alphasense O2-A2 sensor that we were previously using.

During this process, we were able to maintain both sensors on each products certification file. This gave us the advantage of being able to use either sensor should we need to. (Dual Source)

The City 4OXV was choosen as the default O2 sensor for the BW MicroClip, BW Max XT II, BW Clip4, GasAlertQuattro, GasAlertMicro 5 & GasAlert Extreme. However, on occation, without notice, we may use the Alphasense O2-A2 sensor. This is usually done to limit disruptions in supply due to supplier lead times or quality issues. On the rare occation we do have to use the Alphasense O2-A2 sensor, customers will see a purple colored sensor with “Sperian” and “O2-A2” on the sensor label.

Replacement O2 sensors for the above mentioned products will always use the City 4OXV sensor.
The BW Clip is the only BW product that uses the Alphasense O2-A2 by default. Since this is a disposable product, no replacement sensor is offered for it.

Both the Alphasense O2-A2 and City 4OXV O2 sensor are certified and meet the performance standards needed for our BW products.