CO2/R744 LEAK DETECTOR Sensor lifetime: 40000hrs; Sensitivity range: 3 Levels; Maximum sensitivity: 6g/yr; Reset time: <3s; Warm-up time: about 30s; Refrigerants: R744; Power supply: 2*18650 Lithium Battery; Battery life: 8h; Approvals: Compliant to ROHS,SAE-J1627 and EN14624