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MQ-8 Schematic ( PDF Datasheet ) - HANWEI ELETRONICS

Teilenummer MQ-8
Beschreibung GAS SENSOR
Hersteller HANWEI ELETRONICS
Logo HANWEI ELETRONICS Logo 




Gesamt 2 Seiten
MQ-8 Datasheet, Funktion
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℃±2Vc: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向
TEL: 86-371- 67169070 67169080 FAX: 86-371-67169090
A向





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