> **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 CO/Combustible gas sensor (MQ9)

**Type:** Product page · **SKU:** SEN0134 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/analog-co-combustible-gas-sensor-mq9.html ([markdown](https://core-electronics.com.au/analog-co-combustible-gas-sensor-mq9.html.md))

MQ-9 gas sensor has high sensitity to Carbon Monoxide, Methane and LPG. The sensor can be used to detect different gases containing CO and combustible gases, it is low cost and suitable for different applications.

## Pricing

- **Price:** $13.30 (inc GST) — $12.09 AUD, exc GST
- **Quantity discounts:** 6+ $11.49 (exc GST) · 12+ $11.00 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 25 and Aug 31.

## 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)
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## Description

Introduction

MQ-9 gas sensor has high sensitity to Carbon Monoxide, Methane and LPG. The sensor can be used to detect different gases containing CO and combustible gases, it is low cost and suitable for different applications. Sensitive material of MQ-9 gas sensor is SnO2, which has a lower conductivity in clean air. It makes detection by cycling high and low temperature, and detects CO when low temperature (heatedby 1.5V). The sensor’s conductivity is higher along with the gas concentration rising. When high temperature (heated by 5.0V), it detects Methane, Propane etc combustible gas and cleans the other gases adsorbed under low temperature. Applications- Domestic gas leakage detector
- Industrial gas detector
- Portable gas detector

Specification- Power supply needs: 5V
- Interface type: Analog
- Pin Definition: 1-Output 2-GND 3-VCC
- Sensor Type: Semiconductor
- Concentration:
    - 10-1000ppm CO
    - 100-10000ppm combustible gas
    - Good sensitivity to CO/Combustible gas
    - High sensitivity to Methane, Propane and CO
    - Long life and low cost
- Size: 40x20mm

Parts List- Analog CO/Combustible gas sensor(MQ9)1unit

Documents- Wiki Doc
- [MQ9 datasheet](https://core-electronics.com.au/attachments/localcontent/MQ-9_18043e05208.pdf)
- [Schematic](https://core-electronics.com.au/attachments/localcontent/MQ-XSchematic_353427d585d.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0134-1.jpg)