... +/-3% F.S. Alarm method: light, sound and vibration Features1. Test gas in the office, workshop, train, bus, mine, mountain, vessel cabinet ... changeable6. Automatic Temperature Compensation in full range. 7. Large test range up to 0-50000ppm or 0-100% Vol. 8 ... Temperature: -40°C ~ 70°C, 0-95%RHTest Method: pump inhalePower: 1800mA rechargeable battery, 3.6VDCWeight: 200g; Size: 125x52x30mmGas: ...