The Best Moisture Meter for Coffee Grains and Beans – Reviews & Guide

A moisture meter is an important tool for any coffee producer or roaster, as it helps to ensure that the coffee beans remain the freshness or are roasted to perfection. Besides that, if you own a coffee storage facility or want to store your coffee properly, humidity control is essential. Otherwise, the beans will be damaged and lose a great deal of their flavor.

However, choosing the best digital moisture meter for coffee beans can be a difficult task. There are many different factors to consider, such as accuracy, price and features.

In this article, we have included a coffee moisture meter buying guide for your reference.

Let's dig deeper!

Why Do You Need One of the Best Coffee Moisture Meters?

If you’re a coffee lover, then you know that the quality of your beans is important to the taste of your cup. But how do you know if your beans are fresh? One way is to check the moisture content. The ideal moisture content for roasted coffee beans is between 10-12%. Anything above or below that range can result in subpar coffee.

moisture meter for coffee is an essential tool for any coffee roaster, whether you are a professional or hobbyist. Measuring the moisture content of your coffee beans is important for three reasons:

First, the moisture content of your beans will affect the roast. If your beans are too moist, they will not roast evenly and may end up under-roasted. On the other hand, if your beans are too dry, they will burn easily and may end up over-roasted.

Second, the moisture content of your beans affects the shelf life of your roasted coffee. Beans that are too moist will spoil quickly, while beans that are too dry will lose their flavor over time.

A coffee moisture meter can help you ensure that your beans are roasted perfectly and have the best possible shelf life.

Lastly, if you want to store your coffee beans or grounds for long periods of time, you should know the moisture content of your beans or grounds. That's how important a moisture meter is to coffee.

Reviews of the Best Moisture Meter for Coffee & Grains



Types of Grains

Ease of Use

Editor’s rating


17 different types



Coffee and cocoa



36 different types


#1. AMTAST Smart Grain Moisture Meter (The Best Moisture Meter for Grains)

AMTAST Smart Grain Moisture Meter review

AMTAST smart grain moisture meter is a new generation of moisture measuring tools. It uses the latest multi-point calibration technology to make real-time grain moisture analysis quickly and accurately up to 17 kinds of different grains including coffee bean, cocoa bean, sesame, rice, soybean, almonds...etc.

It is a very useful tool for coffee producers and traders by providing a moisture value correction mode which is essential for adjusting the test results in different areas to the most accurate result. The AMTAST Smart Grain Moisture Meter also features an LCD display making it very easy to read and use.

This particular model uses a 9V battery as the power source and has low power consumption, so it will last for at least 1 year without having to worry about constantly changing batteries. The meter comes with an automatic shutoff feature which helps save energy and prolong the battery life.

What We Liked

  • Can test for up to 17 kinds of grain
  • Accurate results
  • Can be used for roasted coffee
  • Easy to operate

What We Didn't Like

  • Automatic shutdown malfunction

#2. Agratronix Coffee Moisture Tester (The Best Moisture Meter for Coffee Beans)

Agratronix Coffee Moisture Tester review

The Agratronix Coffee Moisture Tester has the ability to test for moisture in green coffee, parchment coffee and cocoa bean. It has a large digital backlit LCD display which makes it easy to read the results with ease even in low light conditions.

Besides the basic mode, this meter has an advanced precision calibration mode to help you achieve the most accurate results for professional purposes, such as coffee production or storage. Plus, it's compact and lightweight, making it easy to take with you wherever you go. The moisture tester was powered by a pair of 9V batteries.

This coffee moisture tester can be used with multiple sets of grain scales, allowing for a customization of manual offsets by the operator. Compared to scoop-based testers, it is more precise. The device works optimally in certain moisture ranges, more specifically, 7% - 40% for coffee beans and 4% to 20% for cocoa beans.

What We Liked

  • Precise readings
  • Portable and unique design
  • Digital display with backlit
  • 2 measurement modes

What We Didn't Like

  • Can test for only 3 types of grain
  • Expensive

MC7825G Digital Grain Moisture Meter by M&A Instruments review

If you are looking for a grain moisture meter that is economical, easy to use and has the ability to test multiple types of grain up to 36 species, then this product is just what you need. The MC7825G is used for rapid and exact humidity monitoring during the procedure of coffee production, acquisition, allotment, coffee storage, foodstuff, powder and grain processing.

The device comes with a digital display and a color-coded LED indication for quick and easy reading. The MC7825G is easy to use and it can be used by individuals who do not have any prior experience or knowledge on how to operate a grain moisture meter.

This digital grain moisture meter uses the state-of-the-art Micro-computer LSI circuit and crystal time base to measure moisture content quickly and accurately. It has the ability to acquire the temperature-corrected humidity value automatically.

Plus, you can also connect this moisture meter to your PC for processing your measurement data by using the USB output or the RS-232 output. The device also has an automatic calibration feature and is powered by two pairs of AAA batteries.

What We Liked

  • Measure up to 36 different types of grain
  • Affordable
  • Digital display and LED indication for easy readings
  • Can connect with PC

What We Didn't Like

  • It is not a portable device
  • Do not have much positive feedback

Things to Consider when Choosing the best Moisture Meter for Coffee and Grains

There are a few things to keep in mind when choosing the best moisture meter for coffee grains.

  • The first is the size of the opening, as some moisture meters have a small hole that only accommodate a limited amount of beans at a time.
  • The second is the humidity range of the readings, as some only measure up to 12% while others can measure up to 50%.
  • Thirdly, it's important to consider how accurate the readings are, as even a small margin of error can make a big difference when it comes to roasted coffee beans.
  • Next, if you own a coffee storage facility, you might want to consider investing in a whole house dehumidifier along with a coffee moisture meter as this will allow you to control the moisture levels in your facility completely.
  • Last but not least, you need to consider the price. If you're just looking for something that is cheap but still works, then the MC7825G may be the best fit for you.

Final Words

After reviewing the 3 best moisture meters for coffee on the market today, we picked the AMTAST Smart Grain Moisture Meter as the best one because it is easy to use, has accurate measurement and is cheaper than the runner-up Agratronix moisture tester.

These top coffee moisture meters are all good for producing, roasting and storing coffee. Using a moisture meter is not that complicated, however, picking the best one may be a bit tricky as each product has its own unique features. You can choose the one that best suits your needs and budget.

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