The digital wood hygrometer ensures that your wood is fully seasoned. Then enjoy a fire with less smoke, less stack deposits, and less environmental pollution. Fuel quality is the most important aspect of successful fire building. In order to burn effectively, wood must have a water content of less than 20%, whether in an open fire or in an oven. The moisture content of freshly harvested wood ranges from 30% to 60%, depending on the type of wood. Valiant hygrometers can also be used in wood, flooring, and buildings to detect and measure moisture content. An important requirement is to be able to easily and correctly interpret the display of the hygrometer. This model not only has a backlight screen to illuminate the readings, but also has a built-in color change technology that can clearly indicate the humidity of the wood. Requires 3 No. 7 batteries (not included). Easy to use and read, it can measure the moisture content of wood fuels, structural wood, and masonry even in poor light. The measurement temperature is measured in c or F color coded indicators to indicate whether the wood is suitable for combustion Requires 3 No. 7 batteries (not included). Requires 3 No. 7 batteries (not included). Requires 3 No. 7 batteries (not included).