MQ-3B Semiconductor Sensor for Alcohol Gas
Review: 5 - "A masterpiece of literature" by , written on May 4, 20020
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MQ-3B Semiconductor Sensor for Alcohol Gas

Available:In Stock
R$ 132,00

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

Production Description:
Sensitive material of MQ-3B gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol 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-3B gas sensor has high sensitivity to alcohol gas and can resistant to the interference of gasoline, smoke and vapour. It is with low cost and suitable for various applications of detecting alcohol at different concentration.
Feature:
It has good sensitivity to alcohol in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Application:
It is widely used in domestic alcohol gas alarm, industrial alcohol gas alarm and portable alcohol detector.

Technical Parameters:

Model

MQ-3B

Sensor Type

Semiconductor

Standard Encapsulation

Plastic cap

Target Gas

Alcohol gas

Detection range

25~500ppm alcohol

Standard Circuit

Conditions

Loop Voltage

Vc

≤24V DC

Heater Voltage

VH

5.0V±0.1V AC or DC

Load Resistance

RL

Adjustable

Sensor character under standard test conditions

Heater Resistance

RH

29Ω±3Ω (room tem.)

Heater consumption

PH

≤900mW

Sensitivity

S

Ro(in air)/Rs(125ppm C2H5OH)≥5

Output Voltage

Vs

2.5V~4.0V (in125ppm C2H5OH)

Concentration Slope

α

≤0.6(R300ppm/R50ppmC2H5OH)

Standard test conditions

Tem.  Humidity

20℃±2℃;55%±5%RH

Standard test circuit

Vc:5.0V±0.1V  VH:5.0V±0.1V

Preheat time

Over 48 hours

O2 concentration

21%VOL(no less than 18%VOL)

Lifetime

10 years

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

Production Description:
Sensitive material of MQ-3B gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol 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-3B gas sensor has high sensitivity to alcohol gas and can resistant to the interference of gasoline, smoke and vapour. It is with low cost and suitable for various applications of detecting alcohol at different concentration.
Feature:
It has good sensitivity to alcohol in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Application:
It is widely used in domestic alcohol gas alarm, industrial alcohol gas alarm and portable alcohol detector.

Technical Parameters:

Model

MQ-3B

Sensor Type

Semiconductor

Standard Encapsulation

Plastic cap

Target Gas

Alcohol gas

Detection range

25~500ppm alcohol

Standard Circuit

Conditions

Loop Voltage

Vc

≤24V DC

Heater Voltage

VH

5.0V±0.1V AC or DC

Load Resistance

RL

Adjustable

Sensor character under standard test conditions

Heater Resistance

RH

29Ω±3Ω (room tem.)

Heater consumption

PH

≤900mW

Sensitivity

S

Ro(in air)/Rs(125ppm C2H5OH)≥5

Output Voltage

Vs

2.5V~4.0V (in125ppm C2H5OH)

Concentration Slope

α

≤0.6(R300ppm/R50ppmC2H5OH)

Standard test conditions

Tem.  Humidity

20℃±2℃;55%±5%RH

Standard test circuit

Vc:5.0V±0.1V  VH:5.0V±0.1V

Preheat time

Over 48 hours

O2 concentration

21%VOL(no less than 18%VOL)

Lifetime

10 years