Specifications :
circuit voltage: 5V±0.1
Heating voltage (high): 5V±0.1
Heating voltage (low): 1.4V±0.1
Load resistance: Adjustable
Heating resistance: 33Ω±5%
Heating time (high): 60±1 seconds
Heating time (low): 90±1 seconds
Heating consumption: About 350mW
Using temperature: -20°C-50°C
Storage temperature: -20°C-50°C
Relative humidity: Less than 95%RH
Oxygen concentration: 21%(stand condition) the oxygen concentration can affect the sensitivity characteristic