Use a hygrometer to measure the relative humidity of the air around the wood

Knowing the moisture content of wood is crucial for various woodworking processes. While moisture meters are commonly used, there is an alternative method to estimate the moisture content using a hygrometer. A hygrometer measures the relative humidity (RH) of the air surrounding the wood, providing insights into the wood's moisture content.

How to Use a Hygrometer to Check Wood Moisture Content

Follow these steps to use a hygrometer to determine the approximate moisture content of wood:

1. Measure the Relative Humidity: Place the hygrometer near the wood, ensuring it is not touching the wood or any other objects.
2. Record the RH Readings: Leave the hygrometer for several hours or overnight to obtain stable readings.
3. Estimate Moisture Content: Use a table or chart to estimate the moisture content of the wood based on the recorded RH. Consider the specific wood species when referencing the table.

Accuracy and Limitations

While using a hygrometer provides a rough estimate of wood moisture content, it has limitations:

• Indirect Measurement: Hygrometers do not measure the moisture content directly but instead rely on the surrounding air's RH.
• Environmental Factors: Temperature and air circulation can influence the hygrometer's accuracy.
• Wood Moisture Variation: The moisture content may vary within the wood piece.

For precise moisture content measurements, it is recommended to use a moisture meter specifically designed for wood.