> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Analog Gas Sensor (MQ2)

**Type:** Product page · **SKU:** SEN0127 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/analog-gas-sensor-mq2.html ([markdown](https://core-electronics.com.au/analog-gas-sensor-mq2.html.md))

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.

## Pricing

- **Price:** $11.40 (inc GST) — $10.36 AUD, exc GST
- **Quantity discounts:** 6+ $9.85 (exc GST) · 12+ $9.43 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 350 more in 8–12 days.

## How to buy

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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

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

- [Wiki Doc](https://wiki.dfrobot.com/Analog_Gas_Sensor_SKU_SEN0127)
- [MQ-2 Datasheet](https://core-electronics.com.au/attachments/localcontent/MQ-2_61268e52b42.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/_/i/_igp1312-1.jpg)