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MQ-5 Schematic ( PDF Datasheet ) - HANWEI ELETRONICS

Teilenummer MQ-5
Beschreibung GAS SENSOR
Hersteller HANWEI ELETRONICS
Logo HANWEI ELETRONICS Logo 




Gesamt 2 Seiten
MQ-5 Datasheet, Funktion
HANWEI ELECTRONICS CO.,LTD
MQ-5
TECHNICAL DATA
http://www.hwsensor.com
MQ-5 GAS SENSOR
FEATURES
* High sensitivity to LPG, natural gas , town gas
* Small sensitivity to alcohol, smoke.
* Fast response . * 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, natural gas , town gas, avoid the noise of alcohol and cooking fumes and cigarette smoke.
SPECIFICATIONS
A. Standard work 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
Room Tem
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
α
(5000ppm/1000
ppm CH4)
Standard
detecting
condition
Parameter name
Sensing Resistance
Technical parameter
10KΩ- 60KΩ
(5000ppm methane )
Concentration slope rate
0.6
Temp: 20℃±2Vc:5V±0.1
Humidity: 65%±5% Vh: 5V±0.1
Remarks
Detecting concentration
scope
200-10000ppm
LPG,LNG
Natural gas,
iso-butane, propane
Town gas
Preheat time
Over 24 hour
D. Strucyure 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-5 gas sensor is shown as Fig. 1 (Configuration A or B), sensor composed by
TEL: 86-371- 67169070 67169080 FAX: 86-371-67169090





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