Portable moisture meter-probe 1m long, Dnepropetrovsk region.

Hygrometer probe measures humidity and temperature  6 crops:

wheat, barley, oats, rapeseed,sunflower,corn .

The length of the probe is 1 m. The error is 0.3%.(//tractor-service.com)

Advantages:
· ease of operation - no sampling, weighing, grinding is required; it is enough to simply immerse the device and pour in the grain and record the report;
· operability - display of humidity and temperature values in numbers;
· durability ― construction without moving parts;
accuracy - it is possible to make many measurements in a few seconds, which allows you to get a real picture of a large pile of the product.