... . Alarm method: light, sound and vibration Features1. Test gas in the office, workshop, train, bus, mine, mountain ... accuracy, high resolution and easy operation. 5. Sensor changeable6. Automatic Temperature Compensation in full range. 7. Large test ... +-3% F.S.Alarm method: light, sound and vibrationWorking Temperature: -40°C ~ 70°C, 0-95%RHTest Method ... Time: 30S max40S maxOthers available gas: All