9 Best Grain Moisture Testers 2025 in the United States

The Agratronix MT-Pro Portable Moisture Tester is a versatile tool for measuring grain moisture. It stands out with its ability to directly read out moisture levels for 40 different grain scales, making it highly compatible with a wide range of grains. Its accuracy is notable, with a readout accuracy of ±0.5%, ensuring precise measurements. The device can test grains with high moisture levels up to 40%, which is beneficial for various grain conditions.

The illuminated multilingual LCD display accommodates English, Spanish, French, German, Italian, Portuguese, and Swedish, thus making it accessible to a broader range of users. The tester includes a protective carrying case with a shoulder strap, enhancing its portability and convenience for on-the-go use. It offers both single-point and precision multi-point calibration, allowing flexibility to match local elevator standards.

Despite its relatively large and heavy size for a handheld tool, weighing 1.94 pounds and measuring 12 x 10 x 5 inches, the device's durability, ease of use, and comprehensive grain compatibility make it a strong choice for professionals who need accurate and reliable grain moisture testing.

The John Deere Moisture Tester SW08120 is a robust tool designed for farmers and grain handlers. This device stands out with its impressive accuracy of ± 0.5% in the normal moisture range for stored grain, offering reliable and precise moisture readings. It caters to a wide variety of grains, with direct readouts available for 40 different grain scales, making it highly versatile in grain compatibility.

The measurement range is broad, operating between 5% to 40% moisture depending on the type of grain, which covers most practical needs in grain testing. One of the significant user-friendly features is the larger, illuminated graphic LCD display, which makes it easier to read results even in low light conditions. Additionally, the automatic averaging of consecutive tests and the option to store calibration data for all grains enhance its ease of use.

Portability is another strong suit, given its compact dimensions (9 x 5.2 x 5.1 inches) and light weight (2.4 pounds), making it convenient to carry around. Calibration is straightforward with the device storing average calibration for all grains, ensuring consistent accuracy over time. However, users should be aware that while this moisture tester is quite sophisticated, it may come with a learning curve for those unfamiliar with such equipment. Additionally, as it was first available in 2013, it might lack some of the latest technological advancements present in newer models. This device is ideal for professionals in agriculture who need a reliable, portable, and accurate moisture tester for a variety of grains.

The AgraTronix Ag-MAC PLUS Grain Moisture Meter is a solid choice for farmers or grain handlers who need to quickly check moisture levels in various grains. It supports over 20 grain types, making it versatile if you work with different crops. Its measurement range of 5% to 40% covers typical moisture levels needed to monitor for safe storage and quality.

The meter is fairly user-friendly, featuring a multilingual LCD display for easy reading, which can be helpful if English isn’t your first language. Portability is another plus; it runs on 4 AA batteries and comes with a carrying case and strap, so you can comfortably use it in the field without worrying much about damage. The USB connectivity allows for software updates and personalization, a nice feature that keeps the meter adaptable over time. However, it weighs 8.2 pounds, which might feel a bit heavy for some users during long periods of use.

It offers calibration and diagnostic options via USB, though it is not the newest product on the market (first available in 2014), so it may lack some of the latest advancements in moisture testing technology. Customer reviews rate it around 4 out of 5 stars, indicating generally good performance but suggesting some users may find room for improvement. If you want a dependable, portable moisture meter that covers multiple grain types and offers tech-friendly features like USB support, this meter should serve you well, especially if you value durability and ease of use in field conditions.