The main chip: LM393, MQ-3 gas sensor
Operating voltage: 3-5V DC
Response time: =< 10s(70% Response)
ReCovery time: =< 30s(70% Response)
Heating resistance: 31Ohm±3Ohm
Heating Current: =< 180mA
Heating Voltage: 5V±0.2V
Heating Power: =< 900mW
Detect Voltage: =< 15V
Ambient Temperature: -10°C to 65°C
Humidity: =< 95%RH&nb
Storage conditions: Temperature:-20°C-70°C, Humidity: =< 70%RH
Signal output instructions;
Dual signal output (analog output, and TTL level output);
TTL output valid signal is low, can be connected directly to the microcontroller;
0 ~ 5V analog output voltage, the higher the concentration the higher the voltage;
Has a high sensitivity and good selectivity to ethanol vapor;
Has a long life and reliable stability;
Rapid response recovery characteristics