A simple and effective device which enables the moisture content of firewood to be determined. Features: Detects moisture level in wood and other combustible materials Wide measuring range: 3% - 40% Bar graph reading Data HOLD button Low battery indicator Auto power off Heavy duty and robust construction Protective carry case provided Many of the problems relating to the build up of soot and 'tar' in a chimney is because of incorrect wood burning. The most important requirement when burning wood is to make sure that it is as seasoned and dry as possible.