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MQ-5 Schematic ( PDF Datasheet ) - Winsen Electronics

Teilenummer MQ-5
Beschreibung Semiconductor Sensor
Hersteller Winsen Electronics
Logo Winsen Electronics Logo 




Gesamt 3 Seiten
MQ-5 Datasheet, Funktion
Zhengzhou Winsen Electronics Technology Co., Ltd
www.winsensor.com
MQ-5 Semiconductor Sensor for Combustible Gas
Sensitive material of MQ-5 gas sensor is SnO2, which with lower conductivity in clean air. When the
target combustible gas exist, The sensor’s conductivity is more higher along with the gas concentration
rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of
gas concentration.
MQ-5 gas sensor has high sensitity to Methane, Propane and Butane, and could be used to detect
both Methane and Propane. The sensor could be used to detect different combustible gas especially
Methane, it is with low cost and suitable for different application.
Character
Configuration
* Good sensitivity to Combustible gas in wide range
* High sensitivity to Methane, Butane and Propane
* Long life and low cost
* Simple drive circuit
Application
* Domestic gas leakage detector
* Industrial Combustible gas detector
* Portable gas detector
Technical Data
Basic test loop
Model No.
Sensor Type
Standard Encapsulation
Detection Gas
Concentration
Loop Voltage Vc
Circuit
Heater Voltage
Load
Resistance
VH
RL
Heater
Resistance
RH
Character
Heater
consumption
Sensing
Resistance
PH
Rs
Sensitivity S
Slope
α
Tem. Humidity
Condition Standard test circuit
Preheat time
MQ-5
Semiconductor
Bakelite (Black Bakelite)
LPG, Methane, coal gas
300-10000ppm( Methane,
Propane, Butane, H2)
24V DC
5.0V±0.2V AC or DC
Adjustable
31±3Room Tem.
900mW
2K-20K(in 2000ppm C3H8 )
Rs(in air)/Rs(1000ppm C3H8)5
0.6(R1000ppm/R500ppm H2)
20 ±2 65%±5%RH
Vc:5.0V±0.1V
VH: 5.0V±0.1V
Over 48 hours
Vc VRL
RL
VH
GND
The above is basic test circuit of the sensor.
The sensor need to be put 2 voltage,
heater voltage VH and test voltage VC .
VH used to supply certified working
temperature to the sensor, while VC used
to detect voltage (VRL) on load resistance
RL whom is in series with sensor. The
sensor has light polarity, Vc need DC
power. VC and VH could use same power
circuit with precondition to assure
performance of sensor. In order to make
the sensor with better performance,
suitable RL value is needed:
Power of Sensitivity body(Ps):
Tel: 86-371-67169097 Fax: 86-371-60932988





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