The SM-X was a replacement ozone sensor for the OS-4, OS-6, and A-22. However, the SM-X is no longer in production and is now obsolete.
The SM-6 also used the SM-X as a replacement sensor and therefore, the SM-6 is no longer available.
The replacement SM-X (also known as the SM-X-20 or SM-X-2) ozone sensor was paired with EcoSensors OS-4 Ozone Switch, OS-6 Ozone Controller, and A-22 Ozone Monitor as these devices replacement sensors. The following options are now available instead:
A-22 Ozone Monitor
The A-22 does not have a replacement sensor option. This device is now obsolete and a replacement sensor option is not available. We recommend the following as comparable monitor options:
D-16 with Ozone 0-20 ppm – https://www.gas-sensing.com/d-16-gas-detector.html?sel=2495
S-300 with EOZ 0-10 ppm – https://www.gas-sensing.com/aeroqual-series-300.html
OS-4 Ozone Switch & OS-6 Ozone Controller
The OS-4 and OS-6 devices can use the SM-7/SM-EC electrochemical ozone sensor as a replacement to the SM-6/SM-X and will need to be wired to connect to the OS-4 or OS-6.
There are two range options for this new SM-7/SM-EC sensor: 0-20ppm or 1-50ppm. Both range options can be used with the OS-6, but only the 0-20ppm can be used with the OS-4. After you have upgraded to the SM-7/SM-EC then the SM-EC sensor can be replaced in the SM-7 for future replacement.
The SM-7/SM-EC sensors should be replaced annually as the sensor calibration is good for up to 1 year.
Feel free to contact us with any questions that you have about the SM-X being discontinued.