​Use sensors ​if they are not in original package

Use sensors if electrolyte loss is observed

Immerse the sensor in any liquid

Pass hot or cold gas mixtures over the sensor

Autoclave or freeze the sensor

Place the unit in a water vapor-saturated environment

Use cleaning agents or liquids to clean the sensor or the board

Open or try to repair a leaking or broken sensor

Attempt to use the sensor if the output of the sensor is erratic and unstable when exposed to a calibration gas

Attempt to use the sensor outside of the maximum ambient conditions which manufacturer specifies

Use the sensor when it has been exposed to a drastic change in the environmental conditions without allowing an equilibrium condition to have been reached

Allow moisture to accumulate on the sensor sensing surface