Product description: testo 315-3. 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 Technical data: Storage temperature -20 to +60 °C Operating temperature 0 to +40 °C Battery life 10 h Dimensions 190 x 65 x 40 mm CO measurement (electrochemical) Technical data:\t Measuring range 0 to 100 ppm Accuracy ±3 ppm (0 to 20 ppm) ±5 ppm (>20 ppm) Resolution 0.5 ppm CO₂ measurement (electrochemical) Technical data:\t Measuring 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 Type K Technical data:\t Measuring range -10 to +60 °C Accuracy ±0.5 °C (±1 Digit) Resolution 0.1 °C humid. sensor, cap. Technical data:\t Measuring range +5 to +95 %RH Accuracy ±2.5 %RH (5 to 95 %RH) Resolution 0.1 %RH