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MQ-5 Schematic ( PDF Datasheet ) - ETC
| Teilenummer | MQ-5 |
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| Beschreibung | GAS SENSOR | |
| Hersteller | ETC | |
| Logo |  |
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Gesamt 2 Seiten 
T ECHNICAL DAT A
MQ-5 GAS SENSOR
FEATURES
* Highsensitivity to LPG, natural gas , town gas
* Small sensitivity to alcohol, smoke.
* Fast response. * Stableandlonglife * Simpledrivecircuit
A P P L I CAT I ON
They areusedin gas leakagedetecting equipments infamily andindustry, aresuitablefor detecting of
LPG, natural gas , town gas, avoidthenoiseof alcohol andcookingfumes andcigarettesmoke.
SPECIFICATIONS
A. Standardwork condition
Symbol
Parameter name
Vc Circuit voltage
VH Heating voltage
PL Load resistance
RH Heater resistance
PH Heating consumption
B. Environment condition
Technical condition
5V±0.1
5V±0.1
20KΩ
31± 10%
less than 800mw
Remarks
AC OR DC
ACOR DC
RoomTem
Symbol
Tao
Parameter name
Using Tem
Technical condition
-10℃-50℃
Remarks
Tas StorageTem
-20℃-70℃
RH Related humidity
O2 Oxygen concentration
C. Sensitivity characteristic
less than 95%Rh
21%(standard condition)Oxygen
concentration can affect sensitivity
minimum valueis
over 2%
Symbol
Rs
Parameter name
Sensing Resistance
Technical parameter
10KΩ - 60KΩ
(5000ppm methane )
α
(5000ppm/1000 Concentration sloperate
≤ 0.6
ppm CH4)
Standard
Temp: 20℃± 2℃ Vc:5V±0.1
detecting
Humidity: 65%±5% Vh: 5V±0.1
condition
Preheat time
Over 24 hour
D. Strucyureandconfiguration, basic measuringcircuit
Remarks
Detecting concentration
scope：
200-10000ppm
LPG,LNG
Natural gas,
iso-butane, propane
Town gas
Parts
1 Gas sensing
layer
2 Electrode
3 Electrodeline
4 Heater coil
5 Tubular ceramic
6 Anti-explosion
network
7 Clamp ring
8 Resin base
9 TubePin
Materials
SnO2
Au
Pt
Ni-Cr alloy
Al2O3
Stainless steel gauze
(SUS316 100-mesh)
Copper plating Ni
Bakelite
Copper plating Ni
Confi guration A
Fig. 1
Configuration B
Fig.2
A向 A向
Structureand configuration of MQ-5 gas sensor is shown as Fig. 1 (Configuration A or B), sensor composed by
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