The Calcheck works with the following devices...
- Mini
- Digital Mini
- Timbermaster
- MMS2

Used with pin-type Protimeter moisture meters, the user simply touches the pins to the contact points and ensures that their device reads 18%, plus/minus 1%.
This tool is supplied as standard with all pin-type Protimeters but, being small, is easily lost or damaged.
A resistance meter reads low when contact is poor, and low means "drier than it is" — the dangerous direction for the error to run. A blunt pin, a loose ferrule nut or a worn probe socket all produce it, and none of them announces itself. Touching the pins to the Calcheck takes seconds and tells you the instrument and its pins are still reading true before the figure goes into a report.