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A Step-by-Step Guide to Measuring Carbon Monoxide Levels

June 18, 2026 · The Clime Team
A Step-by-Step Guide to Measuring Carbon Monoxide Levels

Carbon monoxide (CO) is a colorless, odorless gas produced by the incomplete combustion of fuels. Due to its undetectable nature, it's crucial to measure CO levels in your home to prevent potential health hazards. Here's a step-by-step guide to help you accurately measure CO levels:

1. Understand the Risks of Carbon Monoxide

CO can interfere with the body's ability to carry oxygen, leading to symptoms like headaches, dizziness, and, in severe cases, death. Prolonged exposure to even low levels can be harmful. The EPA recommends that CO levels should not exceed 9 ppm over an 8-hour period or 35 ppm over a 1-hour period. (iere.org)

2. Choose the Right Measurement Method

Several methods are available for measuring CO levels, each with its own advantages:

  • Electrochemical Sensors: Common in home detectors, these sensors measure the current produced when CO reacts at an electrode. (iere.org)

  • Metal Oxide Semiconductor (MOS) Sensors: Detect changes in electrical conductivity when CO interacts with a metal oxide surface. (iere.org)

  • Infrared (IR) Absorption Sensors: Measure the absorption of infrared light by CO molecules, offering high accuracy. (iere.org)

  • Colorimetric Tubes: Simple, single-use devices that change color upon exposure to CO, indicating concentration levels. (iere.org)

3. Select a Suitable CO Detector

When choosing a CO detector, consider the following:

  • Placement: Install detectors on each level of your home, especially near sleeping areas. (homedepot.com)

  • Sensitivity: Ensure the detector meets sensitivity requirements, typically not alarming at levels below 30 ppm. (kidde.com)

  • Maintenance: Regularly test and calibrate your detector to ensure accurate readings. (iere.org)

4. Install and Test the Detector

Proper installation and testing are vital:

  • Installation: Follow the manufacturer's instructions for mounting the detector, ensuring it's placed in an area with good airflow and away from potential sources of false alarms. (iere.org)

  • Testing: Use the test button on your detector to verify functionality. For a visual demonstration, refer to this video:

How To Test Carbon Monoxide Detector-Step By Step Instructions

5. Regular Maintenance and Calibration

To maintain accurate CO measurements:

  • Calibration: Periodically calibrate your detector according to the manufacturer's guidelines. (iere.org)

  • Battery Replacement: Replace batteries as recommended to ensure continuous operation.

  • Sensor Replacement: Be aware of the detector's lifespan and replace it as needed.

6. Responding to CO Alarms

If your detector alarms:

  • Evacuate Immediately: Leave the area and seek fresh air.

  • Call Emergency Services: Contact local authorities to address the potential CO source.

By following these steps, you can effectively measure and monitor CO levels in your home, ensuring a safer environment for you and your family.

Highlights:

Frequently Asked Questions