Analog Gas Sensor (MQ2)

SKU: SEN0127 Brand: DFRobot

The analog gas sensor - MQ2 is used in gas leakage detecting equipments in consumer and industry markets, this sensor is suitable for detecting LPG, i-butane, propane, methane ,alcohol, Hydrogen, smoke.

$12.10 AUD, inc GST

$11.00 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Fastest delivery: Tomorrow* Disclaimer:
For next-day delivery, the shipping address must be in the AusPost next-day network, eParcel Express must be selected, and the order must be placed before 2PM AEST Mon-Thurs excluding NSW Public Holidays. Orders may be delayed due to AusPost pickup timings and order verifications. eParcel Express is typically a 1-day service within the AusPost next-day network, though it is sometimes 2+ days.

Quantity Discounts:

6+ $10.45 (exc GST)
12+ $10.01 (exc GST)

The MQ-2 Analog Gas Sensor module is a maker-friendly sensor used to detect the presence of flammable gases and smoke. It produces an analog voltage output that changes with gas concentration, making it well suited for DIY projects such as gas-leak indicators, ventilation triggers, and general air/smoke presence monitoring (for prototyping and educational use).

The MQ-2 responds to a range of gases including LPG, i-butane, propane, methane (natural gas), hydrogen, alcohol vapour, and smoke. Because it is not selective (multiple gases can trigger a response), it’s best used to detect trends/changes or calibrated for your specific environment. An onboard potentiometer allows you to adjust sensitivity for your application.

This is an analog sensor module. Microcontrollers with analog inputs (e.g., Arduino) can read it directly. Devices without analog inputs (e.g., Raspberry Pi) require an external ADC. MQ-series sensors include a heater element, so allow time for warm-up to reach stable readings.

Specifications

Power supply: 5V
Interface type: Analog output
Pin definition: 1-Output 2-GND 3-VCC
Detectable gases: LPG, i-butane, propane, methane, hydrogen, alcohol vapour, smoke
Wide detecting scope (see datasheet for typical sensitivity curves)
Fast response and high sensitivity
Sensitivity adjustable via onboard potentiometer
Simple drive circuit
Stable and long life
Size: 40x20mm

Parts List

1 x Analog Gas Sensor (MQ-2)

Documents

This product is listed in:

Sensors>Gas & Smoke

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40 Aruma Place
Cardiff
NSW, 2285
Australia

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