Voltcraft cm 100 co2 meter voltcraft 101367 p the voltcraft cm 100 co2 meter is a portable instrument for monitoring temperature and carbon dioxide concentration in the ambient air the measurement interval is 2 minutes and shows the permanent to current values if the 8216 set thresholds are exceeded there is an audible alarm the readings for temperature and co2 can be simultaneously read on the lcd screen p p what s in the box br voltcraft cm 100 br sensor br carry case br operati