Long-Term Measurement of Wood Moisture Content in Structural Members

A system for continuously measuring the wood moisture content (MC) of outdoor wood specimens was developed in Switzerland and had been used successfully over a period of about 10 years. This commercially available system measures the relative air humidity (RH) and the temperature in a hole drilled in a wood member or within a wall cavity. The MC is calculated from RH and temperature using previously developed relationships. Two different sensor types have been used. The first one showed an average error at 20?C and 60?C, compared with the average sorption isotherms of European spruce of about ?0.5 percent MC at 20?C and 60?C within an MC range between about 6 percent and the fiber saturation point. The accuracy of the newer second type seems to be in the same order.

You must be logged in to download any documents. Please login (login accounts are free) or learn how to Become a Member