The best grain moisture meters, compared.
Top pick: AMTAST AMT65C – Largest star line in the set: 3.9 from 70, with wheat and barley named and temperature on the screen. Not an oven result, and the written reviews are not marked United Kingdom. Best value: WapoRich RQ-W65pro, 593 g – Lower shelf price of the two RQ-W65pro rows, about £192.69, with cup compression and a stated ±0.5%. No star line. The cheaper probes are not this pick. Updated October 2026.
A grain moisture meter estimates percent moisture from an electrical reading and a crop curve, so you can dry and store grain before it spoils or fails a contract. In the UK, growers, store keepers and smallholders use that figure before they ring the merchant. Judge one by the job, the curve and a yearly check. Selling or drying against a sample needs a cup or a grinding meter. A walk through a bulk can use a probe, and a shallow probe reads low. Wheat and barley can share a cereal approach. Oilseed rape uses a long-store target of 7.5–8%, not a cereal figure, and not below 6%. Resistance needs a full grind. Grain just off a hot dryer can read low. Near 15% moisture, AHDB’s work puts a maintained farm meter within about ±0.5% of an oven test. Cereal risk rises above 14.5%. Dry grain at or above 18% straight away. The checks, in order, are in the [grain moisture meter buying guide](/hub/measuring-equipment/grain-moisture-meter/sub/grain-moisture-meter-buying-guide).
A grain moisture meter estimates percent moisture from an electrical reading and a crop curve, so you can dry and store grain before it spoils or fails a contract.
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Personal buying guide
Question 1 of 2
What are you trying to do with the number?
The AMTAST AMT65C is listed at £148.45 and names 25 grains, including wheat, spring barley, winter barley, white oats, black oats and hard wheat, and it shows moisture and temperature together. It carries the top-pick badge because the star line is 3.9 from 70 ratings, the highest score in this set at 78. That badge is the star line times 20, not an oven test near the 15% moisture AHDB uses. Temperature accuracy is stated as ±1 degree Celsius, with an upper rating of 35°C, and an optional external sensor is mentioned without a line that puts it in the box. The bullets do not name resistance or capacitance. The 17 written reviews on the UK page are marked Brazil, Canada, Mexico or the United States, so they are not British store-keeper opinion. Those reviews include a freeze on a tighten message, battery drain, drift, and a unit that needed a level surface. It runs on a 9 V alkaline battery and the item weight is 880 g.
Pros
Cons
Best for: You want the listing in this set with a wheat and barley list and the only large star line, and you will still check it against a merchant.
Less suitable: You need UK buyer comments, a named method, or a number you will sell without a second meter.
Specifications
Common questions
Does the listing name wheat and barley?
Yes. The crop list includes wheat, spring barley, winter barley, white oats, black oats and hard wheat, among 25 kinds. The bullets do not name resistance or capacitance.
Does it show temperature?
Yes. Moisture and temperature together, with a stated temperature accuracy of ±1 degree Celsius. An optional external temperature sensor is mentioned. The listing does not say that sensor is in the box.
Where are the written reviews from?
The star line is 3.9 from 70 on amazon.co.uk. The 17 written reviews are marked Brazil, Canada, Mexico or the United States. Themes include a freeze on a tighten message, battery drain, drift, and a unit that needed a surface.
The Oumefar double-bar probe is the cheapest row here at £23.79, for 14 named crops including wheat, corn and barley, with a voice broadcast and a backlight that comes on when test data is present. It takes 4 × 1.5 V AA cells, weighs 320 g, and the title also contains the words moisture meter wood. The star line is 3.6 from 8 ratings. The United Kingdom review of 30 September 2026 says the readings were inaccurate, the meter did not always switch on, and two units bought for grain were not fit for the job. A review marked Germany says it works, which does not cancel the UK note. A trim is written as 3% to ±5%, and the upper temperature rating on the page is 21°C. Settings stay if you shut down with a 2-second press of ON/OFF. At this price you are buying a spear with a published UK complaint, not a checked sample meter.
Pros
Cons
Best for: You already treat a cheap spear as a rough bulk scan and you have read the UK review before you pay £23.79.
Less suitable: You need a meter the UK review says is fit for grain, or a sample you will sell on.
Specifications
Common questions
What probe does the listing describe?
A double-bar steel probe with a plastic cover, for 14 named crops including wheat, corn and barley. The title also contains the words moisture meter wood. The backlight is on when test data is present, and there is a voice broadcast.
What batteries does it state?
4 x 1.5 V AA. The listing does not say they are included. A trim is written as 3% to ±5%. Settings are kept if you shut down with a 2-second press of ON/OFF.
What did the UK review say?
The star line is 3.6 from 8. The United Kingdom review of 30 September 2026 says the readings were inaccurate, the meter did not always switch on, and two units bought for grain were not fit for the job. A German review says it works.
The Ayayu double-rod probe is listed at £31.40, and the title starts with hay moisture meter before it calls itself a grain moisture test meter. The crop bullet lists 14 grains and seeds, including wheat and barley. The only written review, from the United Kingdom on 5 October 2024, says there is no hay setting. The listing tells you to insert the sensors in the bale of grains. The probe is a double steel rod with an ABS sleeve, and the page does not state probe length, moisture range or accuracy. Voice is Chinese and English, the display is backlit, and auto-off is 15 minutes. Four AA batteries are required and are not included, and the star line is 3.2 from 5 ratings. A hay buyer who needed a forage curve will not find one in the review that is actually on the page, and a wheat seller still has no depth and no accuracy figure.
Pros
Cons
Best for: You want a short double-rod probe for a cereal list and you are not relying on a hay curve the UK review could not find.
Less suitable: You are checking hay for a fire risk, or you need a stated probe depth before you trust the percent.
Specifications
Common questions
Is this sold as a hay meter?
The title starts with hay moisture meter and then calls it a grain moisture test meter. The crop bullet lists 14 grains and seeds, including wheat and barley. The only written review, from the United Kingdom on 5 October 2024, says there is no hay setting.
Are batteries included?
No. The bullet says 4 AA batteries are not included. Auto-off is 15 minutes. Voice is Chinese and English. The display is backlit.
How does the listing say you take a reading?
By inserting the sensors in the bale of grains. The probe is a double steel rod with an ABS sleeve. Probe length, moisture range and accuracy are not stated. The star line is 3.2 from 5.
The WapoRich RQ-W65pro on this ASIN is a cup you compress, listed at £192.69 and 593 g, for up to 40 grains and seeds including wheat, barley, corn, oats, soybeans, canola, rice and sunflower. The bullets state 0.1% resolution and ±0.5% accuracy, and they describe a beep when the lid is tight. The screen shows moisture and temperature in °C or °F and can store 250 readings with a count and an average. It carries the best-value badge in this set because it is the lower amazon.co.uk price of the two RQ-W65pro rows, £192.69 against £208.00, not because the ±0.5% line has been shown on UK wheat. Oilseed rape is not named here, so the 40-crop bullet does not cover the 7.5–8% long-store target for rape. Technical details say batteries are not required and the power source is ac, which is an odd line for a meter you would carry round a store. There is no star line and no written review, and the listing has no oven comparison. The same model name appears on B0GGGTH5M5 at 432 g, and those two weights should not be averaged.
Pros
Cons
Best for: You want a compressed sample from this set, for wheat or barley, at the lower of the two RQ-W65pro prices.
Less suitable: You need a UK review, a named oilseed-rape curve, or a grinding meter you can send for a yearly check.
Specifications
Common questions
How does this listing say it measures?
The bullets describe a cup that you compress, with an audible signal when the lid is tight. They state 0.1% resolution and ±0.5% accuracy. The listing has no oven comparison.
Which crops are named?
Up to 40 grains and seeds, including wheat, barley, corn, oats, soybeans, canola, rice and sunflower. Oilseed rape is not named on this ASIN.
What does the screen store?
Moisture and temperature, in °C or °F, and up to 250 measurements with a count and an average. The technical details say batteries are not required and the power source is ac. There is no star line.
This second WapoRich RQ-W65pro listing is £208.00, with an item weight of 432 g and dimensions of 16.5 cm wide by 7.4 cm high, and it uses the same model name as B0GGGH539C. The method is again cup compression, with a beep when the lid is tight, a stated ±0.5% and 0.1% resolution, and up to 40 crops. Unlike the other ASIN, this title and crop bullet name oilseed rape as well as wheat, barley, oats, maize, rye, rice and soybeans. The screen shows moisture and temperature in °C or °F, stores 250 readings, and calculates the count and the average. There is no star line, no battery line and no sample capacity in the listing. The £15.31 gap and the 161 g weight gap against the other listing are printed differences, not proof of a second model. The ±0.5% line is still a seller claim without an oven result on UK wheat. If you need rape named on the page, this is the listing that prints it, and if you only need wheat and barley, the other ASIN is the lower shelf price for the same model name.
Pros
Cons
Best for: You want the RQ-W65pro page that prints oilseed rape, and you accept £208.00 with no reviews.
Less suitable: You only need wheat or barley and would rather pay the lower price on the other ASIN, or you need a checked grinding meter.
Specifications
Common questions
How does this listing differ from the other RQ-W65pro?
Both ASINs use the model name RQ-W65pro and a cup-compression description. This one is £208.00, with an item weight of 432 g and dimensions of 16.5 cm wide by 7.4 cm high. B0GGGH539C is £192.69 and 593 g. The two weights are not averaged.
Does it name oilseed rape?
Yes, in the title and the crop bullet, with wheat, barley, oats, maize, rye, rice and soybeans, up to 40 crops. It states ±0.5% and 0.1% resolution. Sample capacity is not stated.
What is on the screen?
Moisture and temperature, switchable between °C and °F, on a backlit LCD. It stores 250 readings and calculates the count and the average. There is no star line and no battery line in the listing.
The YUKERMARB dual-rod probe is listed at £31.09 for a handheld spear that names forage grasses and a long cereal list, including wheat, barley, corn and rice, and it shows moisture to 0.1%. Voice modes run from D1, a humidity reading, through D2, a high-humidity alert, D3 silent and D4 a beep, and the unit switches itself off after 5 minutes. The backlight comes on only when a reading is present, which helps in a dark store and does not tell you the probe is deep enough. Technical details say batteries are not included and are not required, while the bullets still mention a low-battery reminder, so the page does not settle how it is powered. There is no star line and no written review in the amazon.co.uk listing, and the listing states neither a moisture range nor an accuracy figure. An adjustment band of 3% to 5% is printed, which is a wide trim beside the 0.5% margin AHDB describes near 15% moisture. First listed on 29 April 2026, it ranks 238 in Hygrometers, a search position rather than a check against an oven. A probe of this type can flag a wet patch in a bulk, and it is a weak ticket if you are selling wheat on the number.
Pros
Cons
Best for: You want a low-priced dual-rod scan of a cereal or hay bulk and you will confirm the number on a sample meter.
Less suitable: You are selling wheat, or you need a stated accuracy figure and a UK review.
Specifications
Common questions
Which crops does this listing name?
The lead bullet names forage grass, leymus chinensis, alfalfa and other hays, and also rice, wheat, corn, barley, sorghum, feed, rapeseed, sesame, soybean meal and soybeans. A moisture range is not stated.
Does the listing include batteries?
The technical details say batteries are not included and are not required. The bullets still mention a low-battery reminder and settings that remain when batteries are removed.
What do the voice modes do?
The bullet lists D1 as a humidity reading, D2 as a high-humidity alert, D3 as silent and D4 as a beep. Auto-off is 5 minutes. The backlight comes on only when data is present.
The HavenlyCove listing at £102.59 describes a resistance meter with automatic temperature compensation, 0.1% resolution and a voice announcement, and it stores 250 data sets before a 5-minute auto-off. Among 25 types the bullets name coffee and cocoa. They do not name wheat or barley, so a cereal buyer cannot read a wheat curve off this page. The bullet weight is 432 g and the item-weight line is 553 g, both printed on the listing, with product dimensions of 20 × 10 × 10 cm. Power is four AAA cells plus one CR2032, and the listing does not say those cells are in the box. There is no star line, no stated moisture accuracy, and no description of a grinder or a sample cup. Resistance on a maintained farm meter usually needs a ground sample and full compression, and this page shows neither step. At this price you are paying for a crop list that points at coffee and cocoa rather than UK wheat.
Pros
Cons
Best for: You already need a resistance reading for a crop this page names, such as coffee or cocoa, and you can check it another way.
Less suitable: You are drying or selling UK wheat or barley and need a cereal curve on the listing.
Specifications
Common questions
What method does the listing name?
Resistance measurement, with automatic temperature compensation and 0.1% resolution. It names coffee and cocoa among 25 types. It does not name wheat or barley.
Why are two weights in the listing?
The bullet says 432 grams. The item-weight line says 553 g. Product dimensions are 20 x 10 x 10 cm. Both weights are printed on the listing.
What power does it state?
Four AAA batteries plus one CR2032. The listing does not say they are in the box. Auto-off is 5 minutes. It stores 250 data sets and has a voice announcement. There is no star line.
Seven grain moisture meter listings on amazon.co.uk were scored from the amazon.co.uk pages and the review notes already on them, not from an oven test. The badge figure is the amazon.co.uk star rating times 20. A listing with no star line scores 0 on that rule. Review-country notes and listing conflicts sit beside that figure. They are not a second hidden penalty inside it. The row scores also record the crop names, the method and those notes, which is why a cup with no stars can sit above a probe on the table while the top pick remains the largest star line. A stated ±0.5% line stays a seller claim. None of these listings is treated as ISO 712, UKCA or a BS 1363 product.
Star line
40%Up to 40 points from the amazon.co.uk star rating times 20. No star line scores 0 on this block. The largest line in the set is 3.9 from 70. That block sets the top pick. It is not an oven result.
Crop curve on the page
25%Up to 25 points when the listing names the crop you will measure. Wheat and barley can share a cereal list. Oilseed rape is a different target. Coffee, cocoa or a hay title with no forage setting scores lower.
Method for the job
20%Up to 20 points for a method you can match to the job. A cup is a compressed sample. A probe is a bulk scan and does not replace a sample. Resistance needs a grind and full compression. An unnamed method scores lower.
Stated figures
15%Up to 15 points for a printed resolution, a temperature line, and stored readings. A ±0.5% bullet is recorded as a seller claim. A missing accuracy figure, a missing moisture range, or two weights on one page score lower.
Start with the job, then the crop curve, then the method, then a yearly check. The notes below follow that order. None of the scores is an oven test.
A grain moisture meter infers percent moisture from an electrical property and a crop curve. You use it to dry and store UK grain before it spoils or fails a contract. Buyers are growers, store keepers and smallholders who want a number before they ring the merchant. Quality is the method, the curve for your crop, and a meter you can check each year, not a long crop list. The seven amazon.co.uk listings in this comparison were not oven-tested. A seller’s ±0.5% line stays a seller claim.
AHDB says a probe does not replace a sample meter, and shallow probes read low. A spear can flag a wet patch in a bulk. It is a weak ticket if you are selling wheat on the number.
In AHDB’s work, capacitance meters read about 0.4% low straight off a hot dryer. A 15°C gap between meter and grain can add about ±1%. Winding the offset to match the weighbridge is not the annual check AHDB asks for.
Maintained farm meters in AHDB’s work were usually within about ±0.5% of an oven near 15% moisture. A seller line that prints ±0.5% on these cups has not been shown here on UK wheat. ISO 712 is the oven reference, not a handheld badge.
Name the job before the brand. Selling or drying against a sample needs a cup or a grinding meter. A store walk can use a probe, and AHDB says a probe does not replace a sample. Shallow probes read low. Then read the curve. Wheat and barley can share a cereal approach. Oilseed rape for a long store is 7.5–8%, and not below 6%. Maize sits outside the ISO 712 oven scope. Resistance needs a sound grind and full compression.
AHDB wants the meter checked each year. A stated ±0.5% is a seller claim until an oven, a merchant or a clinic has compared it. Near 15% moisture, maintained farm meters in that work were usually within about ±0.5% of the oven, with a 0.5% safety margin. At or above 18% they can under-read by as much as 1%. Repeat tests of one sample stayed within about ±0.3%. Only three listings here show a star line. The largest is 3.9 from 70, and the written reviews are not marked United Kingdom.
Three typical situations, each with a recommendation from this comparison.
You want a wheat and barley list and the only large star line, and you will still check the number with a merchant. The AMTAST AMT65C is about £148.45, with 3.9 from 70 ratings, and it shows moisture and temperature together. The bullets do not name the method, and the written reviews are not marked United Kingdom.
You want a cup you compress, for wheat or barley, at the lower of the two prices that share one model name. The WapoRich RQ-W65pro at about £192.69 states ±0.5% and 0.1% resolution and stores 250 readings. There is no star line, and that ±0.5% line is a seller claim.
You want a low-priced dual-rod scan of a cereal or hay bulk, and you will confirm the number on a sample meter. The YUKERMARB probe is about £31.09, with 0.1% resolution and no star line. Accuracy and the moisture range are not stated.
In this set of seven amazon.co.uk listings, the top pick is the AMTAST AMT65C at about £148.45. The star line is 3.9 from 70 ratings, wheat and barley are named, and the page shows moisture and temperature together. That badge follows the star line. It is not an oven result, and the written reviews are marked Brazil, Canada, Mexico or the United States. The best value is the WapoRich RQ-W65pro at about £192.69, the lower shelf price of the two listings that share that model name, with cup compression and a stated ±0.5% and 0.1% resolution. There is no star line, and the ±0.5% figure is a seller claim. The cheaper probes are not the best value: a UK review on the Oumefar probe says two units were not fit for grain. None of these scores is a lab test.
AMTAST AMT65C
Largest star line in the set: 3.9 from 70, with wheat and barley named and temperature on the screen. Not an oven result, and the written reviews are not marked United Kingdom.
WapoRich RQ-W65pro, 593 g
Lower shelf price of the two RQ-W65pro rows, about £192.69, with cup compression and a stated ±0.5%. No star line. The cheaper probes are not this pick.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources from the research digest. Shelf prices and star lines are the amazon.co.uk figures for these seven listings. The price band is this set, not a market average. A seller’s ±0.5% line is not an oven result.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the UK listing figures used for this comparison. We did not lab-test these grain moisture meters.
