SPECIFICATIONS

Brand Name: NONE

Choice: yes

High-concerned chemical: none

Material: Metal

Origin: Mainland China

Output: Switching Transducer

Theory: Ultrasonic Sensor

Type: Temperature Sensor

Use: Temperature Sensor

is_customized: Yes

semi_Choice: yes

Smoke sensor

Body sensor

Model MQ-2

(The gas leakage monitoring device used in homes and factories is suitable for the detection of liquefied petroleum gas, butane, propane, methane, alcohol, hydrogen, smoke, etc.)

Gas: Smoke

Detection range: 300 to 10000ppmm

Characteristic gas: 1000ppmm isobutane

Sensitivity: R in air/Rin typical gas≥5

Sensitive body resistance: 1KΩ to 20KΩ in 50ppm toluene

Response time: ≤10s

Recovery time: ≤30s

Heating resistance: 31Ω±3Ω

Heating current: ≤180mA

Heating voltage: 5.0V±0.2V

Heating power: ≤900mW

Measuring voltage: ≤24V

Working conditions Ambient temperature: -20℃～+55℃

Humidity: ≤95%RH

Environmental oxygen content: 21%

Storage conditions Temperature: -20℃～+70℃

Humidity: ≤70%RH

MQ-3 Alcohol Sensor

It is used for supervising and testing after drinking of motor vehicle drivers and other risk workers and detecting ethanol vapor in other places.

Specification

Gas

Alcohol (ethanol)

Detection range

10～1000ppm alcohol

Characteristic gas

125ppm alcohol

Sensitivity

R in air/Rin typical gas≥5

Sensitive body resistance

1～ 20KΩ in air

Response time

≤10s (70% Response)

Recovery Time

≤30s (70% Response)

Heating resistance

31Ω±3Ω

Heating current

≤180mA

Heating voltage

5.0V±0.2V

heating power

≤900mW

Measuring voltage

≤24V

Working conditions

Ambient temperature: -20℃～+55℃

Humidity: ≤95%RH

Environmental oxygen content: 21%

Storage conditions

Temperature: -20℃～+70℃

Humidity: ≤70%RH

Model: MQ-4

Brand: winsen Material:

Output model category: analog sensor

Working principle: gas sensor

Applicable scenarios: Household gas alarms, industrial gas alarms, gas detectors

Sensor category: gas sensor

Color: metal

Working current: 1A Working voltage: 4V

Model: MQ-5

Features: wide detection range

High sensitivity

Quick response and recovery

Excellent stability

long life

Simple drive circuit

Applicable gas: liquefied gas, methane, coal gas

Detection range: 300～10000ppm

Characteristic gas: 1000ppm isobutane

Sensitivity: R in air/R in typical gas≥5

Sensitive body resistance: 1KΩ～20KΩ in 2000ppm isobutane

Response time: ≤10s

Recovery time: ≤30s

Heating resistance: 31Ω±3Ω

Heating current: ≤180mA

Heating voltage: 5.0V±0.2V

Heating power: ≤900mW

Measuring voltage: ≤24V

Working conditions Ambient temperature: -20℃～+55℃

Humidity: ≤95%RH

Environmental oxygen content: 21%

Storage conditions Temperature: -20℃～+70℃

Humidity: ≤70%RH

The gas-sensitive material used in the MQ-7 gas sensor is tin dioxide (SnO2) with low conductivity in clean air. The high and low temperature cycle detection method is used to detect carbon monoxide at low temperature (1.5V heating), the conductivity of the sensor increases with the increase of the carbon monoxide gas concentration in the air, and the high temperature (5.0V heating) cleans the stray gas adsorbed at low temperature. A simple circuit can convert the change in conductivity into an output signal corresponding to the gas concentration.

The MQ-7 gas sensor has high sensitivity to carbon monoxide. This sensor can detect a variety of gases containing carbon monoxide and is a low-cost sensor suitable for a variety of applications.

Technical index

Product number

MQ-7

product type

Semiconductor gas sensor

Standard package

Plastic package

Detection gas

Carbon monoxide

Detection concentration

10-1000ppmCO

Standard circuit conditions

Loop voltage

Vc

≤10V DC

Heating voltage

VH

5.0V±0.2V ACorDC (high)

1.5V±0.1VACorDC (low)

heating time

TL

60±1S (high) 90±1S (low)

Load Resistance

RL

Adjustable

Component characteristics under standard test conditions

Heating resistance

RH

31Ω±3Ω (room temperature)

Heating power consumption

PH

≤350mW

Surface resistance of sensitive body

Rs

2KΩ-20KΩ(in100ppmCO)

Sensitivity

S

Rs(in air)/Rs(100ppmCO)≥5

Concentration slope

α

≤0.6(R300ppm/R100ppmCO)

Standard test conditions

temperature humidity

20℃±2℃; 65%±5%RH

,,,,

Standard test circuit

Vc: 5.0V±0.1V; VH (high): 5.0V±0.1V; VH (low): 1.5V±0.1V

Preheat time

Not less than 48 hours

The gas-sensitive material used in the MQ-8 gas sensor is tin dioxide (SnO2) with low conductivity in clean air. When there is sensitive gas in the environment where the sensor is located, the conductivity of the sensor increases with the increase of the concentration of combustible gas in the air. There are different resistance values for different concentrations, and a simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration. The MQ-8 gas sensor has high sensitivity to hydrogen and is ideal for monitoring other hydrogen-containing gases. This sensor can detect a variety of hydrogen-containing gases, especially city gas. It is a low-cost sensor suitable for a variety of applications and is suitable for hydrogen leakage monitoring devices in households or industries. Can not be interfered by ethanol vapor, oil fume, carbon monoxide and other gases. The sensor is specially equipped with M3 fixed mounting hole, using wide voltage LM393 comparator, clean signal, good waveform, strong driving ability, more than 15mA, with adjustable precision potentiometer to adjust sensitivity.

Product parameters:

Working voltage: 5VDC

Power consumption (current): 150mA

Output form: analog and digital output

MQ-9 Carbon Monoxide Combustible Gas Sensor

MQ-135 air quality detection sensor

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