> **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

# Carbon Monoxide Gas Sensor MQ-7

**Type:** Product page · **SKU:** POLOLU-1482 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/carbon-monoxide-gas-sensor-mq-7.html ([markdown](https://core-electronics.com.au/carbon-monoxide-gas-sensor-mq-7.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: SEN0132.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/SEN0132

## How to buy

- **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

| [![](https://core-electronics.com.au/attachments/localcontent/0J2091_10162749696.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2091_1129633eb22.jpg) |
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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 5 V. Please read the MQ7 datasheet (185k pdf) for more information about the sensor.

| [![](https://core-electronics.com.au/attachments/localcontent/0J2089_25811176ea4.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2089_27706f3d2c4.jpg) |
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| Gas sensor with orange plastic case bottom view. |

**Connections**

The heating (H) pins are meant to be operated in a dual voltage cycle: 5 V across the pins for 60 seconds to heat the sensor and then 1.5 V for 90 seconds while reading the sensor. Connecting 5 V at either the A or B pins causes the sensor to emit an analog voltage on the other pins. A resistive load between the output pins and ground sets the sensitivity of the detector. The resistive load should be calibrated for your particular application using the equations in the datasheet, but a good starting value for the resistor is 10 kO.

Pololu offer two breakout boards that make it easier to interface with these sensors: a [Pololu carrier board](https://core-electronics.com.au/pololu-carrier-for-mq-gas-sensors-bare-pcb-only.html) and a [SparkFun carrier board](https://core-electronics.com.au/sparkfun-carrier-for-mq-gas-sensors-bare-pcb-only.html). The Pololu version is shown below.

| \| [![](https://core-electronics.com.au/attachments/localcontent/0J2254_26555547b41.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2254_19156102648.jpg) \| \|---\| \| Pololu MQ gas sensor carrier with sensitivity-setting resistor soldered in the vertical orientation. \| |
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**People often buy this product together with:**

| [![Pololu Carrier for MQ Gas Sensors (Bare PCB Only)](https://core-electronics.com.au/attachments/localcontent/0J2249_5622db37a5.jpg)](https://core-electronics.com.au/pololu-carrier-for-mq-gas-sensors-bare-pcb-only.html) | [Pololu Carrier for MQ Gas Sensors (Bare PCB Only)](https://core-electronics.com.au/pololu-carrier-for-mq-gas-sensors-bare-pcb-only.html) |
|---|---|

| [![LPG / Isobutane / Propane Gas Sensor MQ-6](https://core-electronics.com.au/attachments/localcontent/0J2094_30967c5ec8.jpg)](https://core-electronics.com.au/lpg-isobutane-propane-gas-sensor-mq-6.html) | [LPG / Isobutane / Propane Gas Sensor MQ-6](https://core-electronics.com.au/lpg-isobutane-propane-gas-sensor-mq-6.html) |
|---|---|

**File downloads**

- **Carbon Monoxide gas sensor MQ-7 datasheet (185k pdf)**

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/c/a/carbon_monoxide_gas_sensor_mq_7__pololu_1482__00.jpg)