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MQ-2 View Datasheet(PDF) - Unspecified

Part NameDescriptionManufacturer
MQ-2 GAS SENSOR ETC
Unspecified 
MQ-2 Datasheet PDF : 2 Pages
1 2
HANWEI ELETRONICS CO.,LTD
TECHNICAL DATA
MQ-2
http://www.hwsensor.com
MQ-2 GAS SENSOR
FEATURES
Wide detecting scope
Fast response and High sensitivity
Stable and long life
Simple drive circuit
APPLICATION
They are used in gas leakage detecting equipments in family and industry, are suitable for detecting
of LPG, i-butane, propane, methane ,alcohol, Hydrogen, smoke.
SPECIFICATIONS
A. Standard work condition
Symbol
Parameter name
Vc
Circuit voltage
VH
Heating voltage
RL
Load resistance
RH
Heater resistance
PH
Heating consumption
B. Environment condition
Technical condition
5V±0.1
5V±0.1
can adjust
33Ω±5%
less than 800mw
Remarks
AC OR DC
ACOR DC
Room Tem
Symbol
Tao
Tas
Parameter name
Using Tem
Storage Tem
Technical condition
-20-50
-20-70
Remarks
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
α
(3000/1000)
isobutane
Standard
Detecting
Condition
Preheat time
Parameter name
Sensing
Resistance
Technical parameter
3KΩ-30KΩ
(1000ppm iso-butane )
Concentration
Slope rate
0.6
Temp: 20℃±2Vc:5V±0.1
Humidity: 65%±5% Vh: 5V±0.1
Over 24 hour
Remarks
Detecting concentration
scope
200ppm-5000ppm
LPG and propane
300ppm-5000ppm
butane
5000ppm-20000ppm
methane
300ppm-5000ppm H2
100ppm-2000ppm
Alcohol
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
A
Structure and configuration of MQ-2 gas sensor is shown as Fig. 1 (Configuration A or B), sensor composed by
micro AL2O3 ceramic tube, Tin Dioxide (SnO2) sensitive layer, measuring electrode and heater are fixed into a
TEL: 86-371- 67169070 67169080 FAX: 86-371-67169090
E-mail: sales@hwsensor.com
Direct download click here

 

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