10pcs MQ303B Alcohol Gas sensor

$10.00
Application:It has high sensitivity to alcohol and quick response and resume, widely used in portable
Feature:alcohol gas detector,High sensitivity,quick response and resume

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Availability: 495 In Stock
Categories: Alcohol Detection, Alcohol sensor, Environmental Health

Production Description:
Sensitive material of MQ303B gas sensor is semiconductor material which is with lower conductivity in clean air. When the target alcohol gas exists, 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.
Feature:

  • alcohol gas detector.
  • High sensitivity
  • quick response and resume
  • long lifespan
  • low power consumption
  • small sizes

Application:
It has high sensitivity to alcohol and quick response and resume, widely used in portable

Technical Parameters：

Model

MQ303B

Sensor Type

Semiconductor

Standard Encapsulation

Metal

Target Gas

Alcohol gas

Detection range

20~ 500ppm alcohol

Standard Circuit

Conditions

Loop Voltage

V H

0.9V±0.1V AC or DC

Heater Voltage

V c

≤6V DC

Load Resistance

R L

Adjustable

Heater Resistance

RH

4.0Ω±0.5Ω（room temp.）

Heater consumption

PH

≤140mW

Sensor character under standard test conditions

Zero point

V0

0.01~0.45V

Sensitivity

VS

1.0~2.5V (in 125ppm C2H5OH)

Concentration Slope

α

≤0.6(R300ppm/R50ppm C2H5OH)

Standard test conditions

Tem.  Humidity

20℃±2℃

55%±5%RH

Standard test circuit

Vc:3.0V±0.1V DC 

VH:0.9V±0.1V DC

Preheat time

Not less than 48 hours








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