Cartridges and Extreme Weather
EXO operates optimally in the range of -20°C to 50°C (-4°F to 122°F). For best practices operating EXO outside that range, see Operating Devices in Extreme Weather.
Electrochemical sensors
At temperatures below -20°C (-4°F), the sensor electrolyte inside CO, H2S, and other electrochemical sensors can freeze, reducing the ability of the sensor to give a meaningful output. Storing EXO in a warm and humid (50% relative humidity) environment when not in use, helps keep electrochemical sensors running longer.
Shocking an electrochemical sensor from room temperature to extreme cold and vice versa can also cause temporary drifts in sensor readings. These readings typically resolve in less than 60 seconds.
Infrared (IR) LEL sensors
Sudden temperature and humidity changes may cause condensation within the LEL-IR sensor, which can affect its optics and trigger a temporary baseline drift. Typically, these readings last less than 60 seconds, after which point the readings recover and EXO functions as normal.
Shocking the IR sensor from room temperature to an extremely cold environment can cause a temporary baseline drift, typically less than 10% LEL. If this drift persists, you can manually zero the sensor in the cold environment.
Shocking the IR sensor from an extremely cold environment to room temperature can cause a temporary baseline drift, sometimes reaching overlimit.
