MQ-9 Carbon Monoxide & Combustible Gas Sensor Module

The MQ-9 Carbon Monoxide & Combustible Gas Sensor Module can detect carbon monoxide and combustible gases in the surrounding air. The concentration of the gas is output as an analogue voltage reading. This sensor can detect concentrations between 100-1000ppm and is suitable for portable gas detectors and home safety automation systems.

The module requires two (3) different voltage inputs to operate. Heater voltage (HIGH) should be 5V (AC or DC), Heater voltage (LOW) needs 1.5V (AC or DC) and Loop Voltage should be less than 10VDC.

Please read the MQ9 datasheet for more info about the sensor.

• Gas Detected: Carbon Monoxide & Combustible Gas
• Concentration Sensitivity:
  • Carbon Monoxide: 10-1000ppm
  • Combustible Gas: 100-10000ppm
• Voltage Inputs:
  • Heater:
    • 5.0V±0.2V AC or DC（High）
    • 1.5V±0.1V AC or DC（Low）
  • Loop Voltage: ≤10V DC

• 1 x MQ-9 Carbon Monoxide & Combustible Gas Sensor Module

We ship Australia wide to all addresses, including PO Box, Parcel Locker, etc.

The following shipping options available are listed below:

Australian Orders

• Standard Shipping – Free (low cost / small products) – Sent via standard Australia Post stamped mail, 3 – 7 business days delivery depending on location, minimal tracking.
• Standard Shipping – Free (higher cost / larger products) – Sent via Australia Post Parcel Service or Courier Service, depending on location and mailing address, 2 – 5 business days delivery, with full tracking.
• Express Post – $12.00 (Cost may be higher depending on product size) – Sent via Australia Post Express Service, 1 – 2 business days for metro orders, potentially longer for orders outside of metro zones, with full tracking.

Orders outside of metro orders can take 2+ days longer than the estimates stated above.

International Orders

Shipping costs for international orders vary depending on location and package size, where possible we have kept this to flat rate charges to reduce confusion.

International orders are shipped through Australia Post and Sendle courier service depending on the most economical at the time.

Pick Up
In-person pickup is currently not available. If the order is urgent, please contact us to see what can be arranged.

If you have any questions, please have a look at the customer service portal where you will find answers to many common questions, or you can reach out to us through the contact us page.

More Information

If you would like more information regarding placing international orders, please view the faq page under the “Do you accept international orders?” section.