# Dual Gas CO and CH4 Detection Sensor - MQ-9B

**Type:** Product page · **SKU:** SEN-17050 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/dual-gas-co-and-ch4-detection-sensor-mq-9b.html ([markdown](https://core-electronics.com.au/dual-gas-co-and-ch4-detection-sensor-mq-9b.html.md))

The MQ-9B is a CO and CH4 gas detection sensor form Winsen. The sensing material of the MQ-9B is SnO2, which has a low conductivity in clean air. It detects carbon...

## Pricing

- **Price:** $10.95 (inc GST) — $9.95 AUD, exc GST
- **Quantity discounts:** 5+ $9.65 (exc GST) · 25+ $9.45 (exc GST) · 100+ $9.05 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 28.

## Description

The MQ-9B is a CO and CH4 gas detection sensor form Winsen. The sensing material of the MQ-9B is SnO2, which has a low conductivity in clean air. It detects carbon monoxide (1.5V) by method of cycling high and low temperature. The sensor’s conductivity gets higher with the CO and CH4 gas concentration rising. The sensing range is 10-500ppm CH4. A simple circuit makes measuring this change in conductivity and turning it into data fairly straight-forward, but does require some calibration.

For easy Solderability; use the [Gas Sensor Breakout Board](https://core-electronics.com.au/gas-sensor-breakout-board.html).

**Documents**

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/MQ-9B_Ver1_55011044bf4.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/7/17050-dual_gas_co___ch4_detection_sensor_-_mq-9b-01.jpg)