Electrical Resistance Method

What is the best measure of moisture?

The electrical resistance method is generally recognized as one of the best moisture measurement techniques for wood. This method is based on the principle that the electrical resistance of wood increases as its moisture content decreases.

The electrical resistance method is a non-destructive test that can be used to measure the moisture content of wood in situ. It is a relatively simple and inexpensive test, and it can be performed quickly and easily. The electrical resistance method is widely used in the construction industry to assess the moisture content of wood in buildings. It is also used in the wood products industry to control the moisture content of wood during processing.

How does the electrical resistance method work?

The electrical resistance method involves passing an electrical current through the wood sample. The resistance of the wood sample is then measured. Wood is an excellent insulator, so wet wood (water is a great conductor) has a lower resistance than dry wood. Moisture content is calculated indirectly by measuring electrical resistance across the length of the pin probes.

Advantages of the electrical resistance method

The electrical resistance method has a number of advantages over other moisture measurement techniques:

• The electrical resistance method is non-destructive.
• The electrical resistance method can be used in-situ.
• The electrical resistance method is relatively simple and inexpensive.
• The electrical resistance method can be performed quickly and easily.
• The electrical resistance method is widely used in the construction industry and wood products industry.

Disadvantages of the electrical resistance method

The electrical resistance method also has some disadvantages including:

• The electrical resistance method can be affected by the presence of metal in the wood.
• The electrical resistance method cannot be used to measure the moisture content of wood that is too wet or too dry.

Conclusion

The electrical resistance method is a valuable tool for measuring the moisture content of wood. It is a non-destructive, in-situ, quick, and easy test. The electrical resistance method is widely used in the construction and wood products industries because of its many advantages.