A thermometer for checking the temperature deep in grain, hay or wood chips. It reads at the tip of a 1.5 m probe with a fibreglass shaft and aluminium tip, and updates about once a second. It switches itself off after a short while.
Make a hole first in dense hay bales or anything that needs a lot of force to get into. Don't push the probe into corrosive materials, detergents or oil. In dry wheat it takes about 4 minutes to settle; less in moist material. Store it dry and out of direct sun, with the battery out for long storage.
