Hemal Electronics

This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. This module uses MQ3 Alcohol gas sensor as a alcohol gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.

For Digital output the threshold value can be easily set by an on-board potentiometer.  Using this module you can easily interface MQ3 Alcohol sensor to any Microcontroller, Arduino or even Raspberry Pi.

Since this Gas Sensor module is sensitive to alcohol it can be used in breathalyser. MQ3 Sensor also has small sensitivity to Benzine.

Specification of MQ3 GAS Sensor Module:-

Power Supply: 5 Volts

Interface Type: Analog & Digital

High Sensitivity to Alcohol & small sensitivity to Benzine.

Low Cost.

Stable & Long Life.

On board Power indication.

• Working voltage:DC 5V
• Working Current: 150mA
• DOUT: TTL output
• AOUT: Analog output
• Preheat time: Over 20s
• Dimension: 32mm x 22m x 27mm(HIGH 27mm)

This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. This module uses MQ3 Alcohol gas sensor as a alcohol gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.

For Digital output the threshold value can be easily set by an on-board potentiometer.  Using this module you can easily interface MQ3 Alcohol sensor to any Microcontroller, Arduino or even Raspberry Pi.

Since this Gas Sensor module is sensitive to alcohol it can be used in breathalyser. MQ3 Sensor also has small sensitivity to Benzine.

Specification of MQ3 GAS Sensor Module:-

Power Supply: 5 Volts

Interface Type: Analog & Digital

High Sensitivity to Alcohol & small sensitivity to Benzine.

Low Cost.

Stable & Long Life.

On board Power indication.

This Carbon Monoxide (CO) gas sensor detects the concentrations of CO in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of 10 to 10,000 ppm.The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5V.

Specifications of MQ7 Gas Sensor:-

• Size: 35mm × 22mm × 18mm
• Detection of gas: carbon gas
• Heating voltage: 5 ± 0.2V (AC · DC)
• Working current: 140mA
• Loop voltage: 10V (maximum DC 15V)
• Load resistance: 10K (adjustable)
• Detection concentration range: 10-1000ppm
• Clean air voltage: ≤1.5V
• Sensitivity: ≥3%
• Response time: ≤1S (preheat 3-5 minutes)
• Response time: ≤30S
• Element power: ≤0.7W
• Working temperature: -10 ~ 50 ??? (nominal temperature 20 ???)
• Humidity: 95% RH (nominal humidity 65% RH)

• Working Current15 mA
• Operating Temperature-20 to 70 Degree C
• Size30 x 16 mm
• Working HumidityLess Than 93 Percent RH

This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. This module uses MQ6 LPG gas sensor as a gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.

Features of MQ6 LPG Gas Sensor Module:-

• High Sensitivity to LPG, iso-butane, propane
• Small sensitivity to alcohol, smoke
• Good sensitivity to Combustible gas in wide range
• High sensitivity to Propane, Butane, LPG and also response to Natural gas
• Long life and low cost
• Simple drive circuit

Applications of MQ6 LPG Gas Sensor Module:-

• Gas leak detection system
• Fire/Safety detection system
• Domestic gas leakage detector
• Industrial Combustible gas detector
• Portable gas detector
• Gas leak alarm
• Gas detector

The MQ 135 Air Quality Detector Sensor Module For Arduino has lower conductivity in clean air. When the target combustible gas exists, the conductivity of the sensor is higher along with the gases concentration rising. Convert change of conductivity to the corresponding output signal of gas concentration. The MQ135 gas sensor has high sensitivity to Ammonia, Sulphide and Benzene steam, also sensitive to smoke and other harmful gase.

Other Detail:

• Package Includes 1 x MQ 135Air Quality Sensor Module. Specifications and features Air Quality Sensor Module
• Condition New
• Main chip MQ-135
• Type Analog & Digital
• Sensitivity to Ammonia, Sulphide and Benzene steam
• With signal output instructions
• TTL output signal is low level
• Color is showing pictures.
• Sensitive for benzene, alcohol, smoke
• Fast response and recovery
• Adjustable sensitivity
• Signal output indicator
• Output voltage boosts along with the concentration of the measured gases increases
• Please NOTE that due to lighting effects, monitor's brightness/contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item!

This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. This module uses MQ2 Smoke & Flammable gas sensor as a gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.

For Digital output the threshold value can be easily set by an on-board potentiometer.  Using this module you can easily interface MQ2 Smoke & Combustible gas Sensor to any Microcontroller, Arduino or even Raspberry Pi.

Specifications:-

• Power Supply: 5 Volts
• Interface Type: Analog & Digital
• High Sensitivity to Smoke & combustible gasses like Hydrogen, LPG & Propane.
• Low Cost.
• Stable & Long Life.
• On board Power indication.