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Gas Sensor. MQ-2 Datasheet

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Gas Sensor. MQ-2 Datasheet
















MQ-2 Sensor. Datasheet pdf. Equivalent













Part

MQ-2

Description

Gas Sensor



Feature


HANWEI ELETRONICS CO.,LTD MQ-2 http:// www.hwsensor.com TECHNICAL DATA MQ-2 GAS SENSOR FEATURES Wide detecting s cope Fast response and High sensitivity Stable and long life Simple drive circ uit APPLICATION They are used in gas le akage detecting equipments in family an d industry, are suitable for detecting of LPG, i-butane, propane, methane ,alc ohol, Hydrogen, sm.
Manufacture

Hanwei

Datasheet
Download MQ-2 Datasheet


Hanwei MQ-2

MQ-2; oke. SPECIFICATIONS A. Standard work con dition Symbol Vc VH www.DataSheet4U.com RL RH PH Symbol Tao Tas RH O2 Paramete r name Circuit voltage Heating voltage Load resistance Heater resistance Heati ng consumption Technical condition 5V± 0.1 5V±0.1 can adjust 33Ω±5% less th an 800mw Technical condition -20℃-50 -20℃-70℃ less than 95%Rh 21%(sta ndard condition)Oxygen concent.


Hanwei MQ-2

ration can affect sensitivity Technical parameter 3KΩ-30KΩ (1000ppm iso-butan e ) Remarks AC OR DC ACOR DC Room Tem B. Environment condition Parameter name Using Tem Storage Tem Related humidity Oxygen concentration Remarks minimum value is over 2% Remarks Detecting conc entration scope: 200ppm-5000ppm LPG a nd propane 300ppm-5000ppm butane 5000pp m-20000ppm methane 300.


Hanwei MQ-2

ppm-5000ppm H2 100ppm-2000ppm Alcohol C . Sensitivity characteristic Symbol Rs Parameter name Sensing Resistance Conce ntration Slope rate Temp: 20℃±2℃ H umidity: 65%±5% α (3000/1000) isobut ane Standard Detecting Condition Prehea t time ≤0.6 Vc:5V±0.1 Vh: 5V±0.1 Over 24 hour D. Structure and configur ation, basic measuring circuit 1 2 3 4 5 6 7 8 9 Parts Gas sensing.





Part

MQ-2

Description

Gas Sensor



Feature


HANWEI ELETRONICS CO.,LTD MQ-2 http:// www.hwsensor.com TECHNICAL DATA MQ-2 GAS SENSOR FEATURES Wide detecting s cope Fast response and High sensitivity Stable and long life Simple drive circ uit APPLICATION They are used in gas le akage detecting equipments in family an d industry, are suitable for detecting of LPG, i-butane, propane, methane ,alc ohol, Hydrogen, sm.
Manufacture

Hanwei

Datasheet
Download MQ-2 Datasheet




 MQ-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
www.DataSheet4U.com RL
RH
Load resistance
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
AA
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




 MQ-2
HANWEI ELETRONICS CO.,LTD
MQ-2
http://www.hwsensor.com
crust made by plastic and stainless steel net. The heater provides necessary work conditions for work of
sensitive components. The enveloped MQ-2 have 6 pin ,4 of them are used to fetch signals, and other 2 are used
for providing heating current.
Electric parameter measurement circuit is shown as Fig.2
E. Sensitivity characteristic curve
MQ-2
10
www.DataSheet4U.com
1
H2
LPG
CH4
CO
alcohol
smoke
propane
air
0.1
100
1000
Fig.2 sensitivity characteristics of the MQ-2
Fig.3 is shows the typical
sensitivity characteristics of
the MQ-2 for several gases.
in their: Temp: 20℃、
Humidity: 65%
O2 concentration 21%
RL=5kΩ
Ro: sensor resistance at 1000ppm of
H2 in the clean air.
Rs:sensor resistance at various
concentrations of gases.
ppm
10000
1.8
1.6
1.4
1.2
33%RH
85%RH
Fig.4 is shows the typical dependence of
the MQ-2 on temperature and humidity.
1 Ro: sensor resistance at 1000ppm of H2 in air
0.8 at 33%RH and 20 degree.
0.6 Rs: sensor resistance at 1000ppm of H2
0.4 Fig.4
at different temperatures and humidities.
0.2 degree
0
-20 -10 0 10 20 30 40 50 60
SENSITVITY ADJUSTMENT
Resistance value of MQ-2 is difference to various kinds and various concentration gases. So,When using
this components, sensitivity adjustment is very necessary. we recommend that you calibrate the detector for
1000ppm liquified petroleum gas<LPG>,or 1000ppm iso-butane<i-C4H10>concentration in air and use value of
Load resistance that( RL) about 20 KΩ(5KΩ to 47 KΩ).
When accurately measuring, the proper alarm point for the gas detector should be determined after
considering the temperature and humidity influence.
TEL: 86-371- 67169070 67169080 FAX: 86-371-67169090
E-mail: sales@hwsensor.com








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