Safe-T-Alert Carbon Monoxide Test Gas SA-HHTG-1 03-0376

Only carbon monoxide gas can be used to verify the calibration of UL listed CO alarms. Can contains enough gas to perform 7 tests at the 400 ppm calibration UL test point. Unique packaging doubles as the rest chamber. Tests any brand of alarm. Combine with HHCO CO monitor/analyzer for professional test results.