Measuring Radon with a Radon Meter

Radon is a naturally occurring radioactive gas that can accumulate in homes and other buildings, potentially causing health problems. The only way to know if you have high levels of radon in your home is to measure it using a radon meter (radonmåler). In this article, we will provide a guide to measuring radon with a radon meter (radonmåler).

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What is a Radon Meter?

A radon meter (radonmåler) is a device that measures the concentration of radon gas in the air. There are two main types of radon meters: passive and active. Passive radon meters do not require power and are left in place for a period of time to collect data. Active radon meters require power and continuously measure the radon concentration.

How to Measure Radon with a Radon Meter

Step 1: Choose a Radon Meter

There are many types of radon meters available on the market. Consider your needs and budget before choosing a radon meter. Some things to consider include the accuracy of the device, the length of the measurement period, and the ease of use.

Step 2: Place the Radon Meter

The radon meter should be placed in the lowest level of your home, where you spend the most time. This could be a basement, first floor, or any other level where you spend more than four hours per day. The radon meter should be placed at least 20 inches above the floor and away from walls and other obstructions.

Step 3: Start the Measurement

If you are using a passive radon meter, follow the manufacturer’s instructions for how long to leave the device in place. This can range from a few days to several months. Once the measurement period is complete, seal the device and send it to a lab for analysis. If you are using an active radon meter, follow the manufacturer’s instructions for how to start the measurement.

Step 4: Analyze the Results

Once you receive the results from the lab or the active radon meter, compare them to the EPA’s recommended action level of 4 pCi/L (picocuries per liter). If the radon concentration is above this level, consider taking steps to reduce the level of radon in your home.


Measuring radon with a radon meter is an important step in protecting yourself and your family from the potential health risks associated with high levels of radon. By following these steps and using a reliable radon meter, you can accurately measure the radon concentration in your home and take appropriate action if necessary.