A moisture meter for wood pellets, sawdust and firewood. For logs, saw across the log with a chainsaw, collect about half a litre of the sawdust, and measure that. Fill the cup, shake it, top it up, and screw the cap down; the result shows as a percentage by weight.
Use a sharp chain: a blunt one heats the sample and gives a wrong reading. Always use the right protective equipment and follow the chainsaw maker's safety instructions.
It averages up to 99 readings, and each scale can be adjusted in 0.1% steps. Clean it with a damp or dry cloth, no detergents, and keep it dry, ideally at room temperature.
