MQ-4 Semiconductor Sensor for Flammable Gas
Review: 5 - "A masterpiece of literature" by , written on May 4, 20020
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MQ-4 Semiconductor Sensor for Flammable Gas

Available:In Stock
R$ 13,90

Application:It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.
Feature:It has good sensitivity to methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.

Production Description:
Sensitive material of MQ-4 gas sensor is SnO2,which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ-4 gas sensor has high sensitivity to methane, also has anti-interference to alcohol and other gases.
Feature:
It has good sensitivity to methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Application:
It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.

Technical Parameters:

Model

MQ-4

Sensor Type

Semiconductor

Standard Encapsulation

Bakelite, Metal cap

Target Gas

Methane

Detection range

300~10000ppm(CH4)

Standard Circuit

Conditions

Loop Voltage

Vc

5.0V±0.1V DC

Heater Voltage

VH

5.0V±0.1V AC or DC

Load Resistance

RL

Adjustable

Sensor character under standard test conditions

Heater Resistance

RH

28Ω±3Ω(room temp.)

Heater consumption

PH

≤1W

Sensitivity

S

Rs(in air)/Rs(in 5000ppmCH4)≥5

Output Voltage

Vs

2.5V~4.0V (in 5000ppm CH4)

Concentration Slope

α

≤0.6(R5000ppm/R1000ppmCH4)

Standard test conditions

Temp.  Humidity

20℃±2℃;55%±5%RH

Standard test circuit

Vc:5.0V±0.1V

VH:5.0V±0.1V

Preheat time

Not less than 48 hours

O2content

21%(not less than 18%)

O2 concentration effects initial value, sensitivity and repeatability.

Lifespan

10 years

Application:It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.
Feature:It has good sensitivity to methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.

Production Description:
Sensitive material of MQ-4 gas sensor is SnO2,which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ-4 gas sensor has high sensitivity to methane, also has anti-interference to alcohol and other gases.
Feature:
It has good sensitivity to methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Application:
It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.

Technical Parameters:

Model

MQ-4

Sensor Type

Semiconductor

Standard Encapsulation

Bakelite, Metal cap

Target Gas

Methane

Detection range

300~10000ppm(CH4)

Standard Circuit

Conditions

Loop Voltage

Vc

5.0V±0.1V DC

Heater Voltage

VH

5.0V±0.1V AC or DC

Load Resistance

RL

Adjustable

Sensor character under standard test conditions

Heater Resistance

RH

28Ω±3Ω(room temp.)

Heater consumption

PH

≤1W

Sensitivity

S

Rs(in air)/Rs(in 5000ppmCH4)≥5

Output Voltage

Vs

2.5V~4.0V (in 5000ppm CH4)

Concentration Slope

α

≤0.6(R5000ppm/R1000ppmCH4)

Standard test conditions

Temp.  Humidity

20℃±2℃;55%±5%RH

Standard test circuit

Vc:5.0V±0.1V

VH:5.0V±0.1V

Preheat time

Not less than 48 hours

O2content

21%(not less than 18%)

O2 concentration effects initial value, sensitivity and repeatability.

Lifespan

10 years