Our portable grain moisture meter has been designed to quickly, easily, and accurately determine the moisture content of 25 different seed types. The measurement range typically lies between 3% and 80% moisture, depending on the type of grain, with a resolution of 0.1% and an accuracy of ±0.5%. The required sample size is approximately 90 ml, allowing for rapid and straightforward application directly on-site. The grain moisture meter operates on a capacitive basis and utilizes the compaction of the sample caused by filling and sealing to enhance measurement accuracy. The device features an alarm function for individually adjustable upper and lower limits, displays minimum and maximum values, and includes an average value calculation function. Additionally, it offers a data storage function for up to 240 measurements, a user-friendly keypad, and automatic temperature compensation. Thanks to the described compaction, the grain moisture meter provides reliable measurements for monitoring storage stability and processing readiness. It is suitable for professional applications where precise moisture determination of grains is required.