A few seconds. That's all it takes. That's all it takes to be on the safe side and test the surrounding air for carbon monoxide. The Testo 317-3 CO meter measures the concentration of carbon monoxide in the surrounding air and presents the readings on an easy-to-read display. The CO meter has both a visual and an audible alarm which are triggered when a threshold is crossed. The thresholds can be adjusted individually.
The CO meter comes with a carry case and a belt clip to ensure that you always have your meter on you and a handstrap which can be wrapped loosely around the wrist to prevent the meter from falling onto the floor.And as if that wasn`t enough to convince you, the Testo 317-3 also comes with a 3-year CO sensor warranty. There`s testo for you.