Gas detected: oxygen (O2). Detection principle: galvanic cell. Detection range: 0 - 40% vol.(0.1% vol.). Alarm set points: low 19.5% vol. High 23.5% vol. Over 40% vol. Types of alarms: gas alarms: 1st and 2nd (user adjustable), OVER alarm, STEL and TWA.
Trouble alarms: sensor connection, low battery circuit failure and calibration range error. Response time: T90 in 30 seconds (alarms within 5 seconds when exposed to 12% O2). Accuracy: +/- 0.5% vol. Dimension and weight: 1.4 x 4.1 x 0.8 inches; 3.5 ounces (100 g). Operating temp. and humidity: -20°C ~ 50°C; humidity below 90% RH (non-condensing).