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MQ-3 Schematic ( PDF Datasheet ) - HANWEI ELETRONICS
| Teilenummer | MQ-3 |
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| Beschreibung | GAS SENSOR | |
| Hersteller | HANWEI ELETRONICS | |
| Logo |  |
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Gesamt 2 Seiten 
HANWEI ELETRONICS CO.,LTD
MQ-3
http://www.hwsensor.com
TECHNICAL DATA
MQ-3 GAS SENSOR
FEATURES
* High sensitivity to alcohol and small sensitivity to Benzine .
* Fast response and High sensitivity
* Stable and long life
* Simple drive circuit
APPLICATION
They are suitable for alcohol checker, Breathalyser.
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
200KΩ
33Ω±5%
less than 750mw
Symbol
Tao
Parameter name
Using Tem
Technical condition
-10℃-50℃
Tas Storage Tem
-20℃-70℃
RH Related humidity
less than 95%Rh
O2
Oxygen concentration
21%(standard condition)Oxygen
concentration can affect sensitivity
C. Sensitivity characteristic
Symbol
Rs
Parameter name
Sensing Resistance
Technical parameter
1MΩ- 8 MΩ
(0.4mg/L alcohol )
α
(0.4/1 mg/L)
Concentration slope rate
≤0.6
Standard
detecting
condition
Preheat time
Temp: 20℃±2℃ Vc:5V±0.1
Humidity: 65%±5% Vh: 5V±0.1
Over 24 hour
D. Structure and configuration, basic measuring circuit
Remarks
AC OR DC
ACOR DC
Room Tem
Remarks
minimum value is
over 2%
Remarks
Detecting concentration
scope：
0.05mg/L—10mg/L
Alcohol
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
E-mail: sales@hwsensor.com
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| Seiten | Gesamt 2 Seiten | |
| PDF Download | [ MQ-3 Schematic.PDF ] | |
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