Greisinger-GCO-100-i Carbon-Monoxide-Measuring-Meter-Greisinger-GCO-100-P-The-Greisinger-GCO-100-is-a-Carbon-Monoxide-Meter-that-will-detect-dangerous-gases-&-warns-the-user-both-visually-&-acoustically-where-the-CO-emissions-exceed-the-allowable-occupational-exposure-limit-or-TLV-MAK-P-P-The-gas-concentration-is-measured-at-the-end-face-opening-of-the-sensor-device-The-CO-meter-comes-supplied-with-a-calibration-certificate-P-P-Applications-control-&-maintenance-of-heating-s