Why does my ToxCO have a gas cylinder connected to a ToxCO symbol on the screen?

Calibration Reminder For ToxCO

This indicates that the device needs calibrating, you can find instruction of how to calibrate the device in the user manual. This could also show if the device has been reset, the device will still need calibrating.

 If the problem persists or has not been resolved by the information provided above, please contact your local distributor for more information. Find out who your local distributor is from our website here.