The displacement of O3 sensor will be directly affected by the conditions before or when the O3 sensor is not in use. Manufacturers typically list suggested storage conditions on the sensor’s data sheet.
The electrochemical O3 sensor should be placed in a refrigerator at room temperature (or preferably), but not below -20°C. At these low temperatures, the electrolytes inside the electrochemical sensor freeze and break the shell.
The maximum storage temperature of the gas sensor is 60℃. Above this temperature, the ABS resin housing of the sensor can melt and damage the sensor.
Condensation on the gas diffusion film of the sensor should be avoided. Fortunately, once the condensation disappears, the sensor should recover over time.
Conversely, storage in an extremely dry environment will change the life of the electrochemical O3 sensor due to excessive evaporation of the liquid electrolyte.
Atmospheric pressure can also affect the life of electrochemical oxygen sensors due to excessive evaporation of liquid electrolytes and rupture of seals.
If the sensor is in cold storage, it should be normalized to the ambient temperature before use to obtain an accurate reading.
In general, the best storage for any gas sensor is a dark, cool, away container.
If the ozone sensor reaches the sealed bag, it should remain sealed until use. If the oxygen sensor is not contained in a sealed bag, it must be sealed. Some oxygen sensors require a small amount of oxygen to maintain their internal calibration.
Storage life or shelf life is particularly important for electrochemical ozone sensors. These sensors work through chemical reactions within the sensors.
When the sensor is exposed to the target gas, the chemical emits an electrical output (voltage or amperes) proportional to the level of the gas.
This means that even if the sensor is not used, it will still consume the chemicals inside if it is exposed to the air.
Absorption dries out at high temperatures and low humidity. Eventually, the chemical reaction slows to the point where the sensor can no longer provide an accurate reading.