Testo-0560-5350-Precision-CO-Meter-for-Air-Quality-Measurements-Testo-0560-5350-P-This-gas-meter-from-Testo-is-designed-to-measure-the-carbon-dioxide-concentration-in-the-ambient-air-because-stale-air-has-a-much-higher-CO2-concentration-than-fresh-air-It-is-ideal-for-monitoring-&-optimising-the-room-climate-in-offices-etc-&-can-also-be-used-to-check-if-existing-air-conditioning-&-ventilation-systems-are-providing-the-relevant-rooms-with-enough-fresh-air-P-P-This-meter-has-a-high-p