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HANWEI ELECTRONICS CO.,LTD
TECHNICAL DATA
MQ-138
http://www.hwsensor.com
MQ-138 GAS SENSOR
FEATURES
Wide detecting scope
Fast response and High sensitivity
Stable and long life
Simple drive circuit
APPLICATION
They are used in Breath alcohol detector, solvent detectors ,Air quality control equipments for
buildings/offices, are suitable for detecting of n-Hexane, Benzene, NH3, alcohol, ,smoke, CO ,etc.
SPECIFICATIONS
A. Standard work condition
Symbol Vc VH
Parameter name Circuit voltage Heating voltage
Technical condition 5V±0.1 5V±0.1
Remarks AC OR DC ACOR DC
RL Load resistance RH Heater resistance
can adjust 31Ω±3Ω
Room Tem
PH Heating consumption less than 850mw
B.
MQ-138 Datasheet
