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MQ-8

HANWEI ELETRONICS
Part Number MQ-8
Manufacturer HANWEI ELETRONICS
Description GAS SENSOR
Published Feb 25, 2015
Detailed Description HANWEI ELETRONICS CO.,LTD MQ-8 http://www.hwsensor.com TECHNICAL DATA MQ-8 GAS SENSOR FEATURES * High sensitivity ...
Datasheet PDF File MQ-8 PDF File

MQ-8
MQ-8

Overview
HANWEI ELETRONICS CO.
,LTD MQ-8 http://www.
hwsensor.
com TECHNICAL DATA MQ-8 GAS SENSOR FEATURES * High sensitivity to Hydrogen (H2) * Small sensitivity to alcohol, LPG,cooking fumes * Stable and long life APPLICATION They are used in gas leakage detecting equipments in family and industry, are suitable for detecting of Hydrogen (H2), avoid the noise of alcohol and cooking fumes, LPG,CO.
SPECIFICATIONS A.
Standard work condition Symbol Parameter name Technical condition Remarks Vc Circuit voltage 5V±0.
1 AC OR DC VH Heating voltage PL Load resistance RH Heater resistance 5V±0.
1 10KΩ 31±5% ACOR DC Room Tem PH Heating consumption B.
Environment condition less than800mW Symbol Tao Parameter name Using Tem Technical condition -10℃-50℃ Remarks Tas Storage Tem -20℃-70℃ RH Related humidity less than 95%Rh O2 Oxygen concentration 21%(standard condition)Oxygen minimum value is concentration can affect sensitivity over 2% C.
Sensitivity characteristic Symbol Rs Parameter name Sensing Resistance Technical parameter 10KΩ- 60KΩ (1000ppm H2) Ramark 2 Detecting concentration scope： 100-10000ppm α (1000ppm/ Concentration slope rate ≤0.
6 Hydrogen (H2) 500ppmH2) Standard detecting condition Temp: 20℃±2℃ Vc:5V±0.
1 Humidity: 65%±5% Vh: 5V±0.
1 Preheat time Over 24 hour D.
Structure and configuration, basic measuring circuit Parts 1 Gas sensing layer 2 Electrode 3 Electrode line 4 Heater coil 5 Tubular ceramic 6 Anti-explosion network 7 Clamp ring 8 Resin base 9 Tube Pin Materials SnO2 Au Pt Ni-Cr alloy Al2O3 Stainless steel gauze (SUS316 100-mesh) Copper plating Ni Bakelite Copper plating Ni Configuration A Fig.
1 Configuration B Fig.
2 A TEL: 86-371- 67169070 67169080 FAX: 86-371-67169090 A E-mail: sales@hwsensor.
com HANWEI ELETRONICS CO.
,LTD MQ-8 http://www.
hwsensor.
com Structure and configuration of MQ-8 gas sensor is shown as Fig.
1 (Configuration A or B), sensor composed by micro AL2O3 ceramic tube, Tin Dioxide (SnO2) sensit...


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