Model: HY - HS01 Use: Hydrogen leak and concentration sensor detection Features: Small size, easy to use, high sensitivity, wide range of induction concentration of hydrogen. Simple and rapid reduction, auto-alarm device, flashlight function, can adapt to relative humidity of 100% of the external environment, stable performance, non-polluting Technical parameters: Lowest concentration monitoring: > 2 % Operating temperature: 5- 90º C Detection range: Radius 100 mm - infinite Life: > 10000 times Power Supply: 9 V battery Response time: < 1 s Buzzer can reach 60 dB / s Size: 132 mm x Ø 58 mm x Ø 48 mm