Testo 315-3 - CO/CO2 Monitor incl. USB mains unit cable and case Testo 315-3 with Bluetooth. Parallel and direct CO/CO2 measurement in ambient air according to EN Standard 50543. Convenient, easy operation Measurement values transferable to Testo 330. Convenient, easy operation Data transfer to the testo 330 Parallel CO/CO2 measurement Direct display of both gases Conforms to British Standard BS 6173:2009 Extremely tough sensors Storage temperature -20 to +60 °C Operating temperature 0 to +40 °C Battery life 18 h Probe type Type K Meas. Range -10 to +60 °C Accuracy ±0.5 °C (±1 Digit) Resolution 0.1 °C Probe - Electrochemical measurement CO Meas. Range 0 to 100 ppm Accuracy ±3 ppm (0 to 20 ppm), ±5 ppm (>20 ppm) Resolution 0.5 ppm Probe - Electrochemical measurement CO2 Meas. Range 0 to 10.000 ppm Accuracy ±300 ppm (0 to 4.000 ppm), ±8% of mv (4.000 to 6.000 ppm), ±500 ppm (6.000 to 10.000 ppm) Resolution 10 ppm Probe - humid. sensor, cap. Meas. Range 5 to +95 %RH Accuracy ±2.5 %RH (5 to 95 %RH) Resolution 0.1 %RH