Best Firewood Moisture Meters UK (2026): Cheap, Accurate Picks

If your fire is hard to light, hisses, or blackens the glass, wet wood is almost always the culprit. A moisture meter is the cheap tool that ends the guesswork, telling you in seconds whether a log is ready to burn or needs another summer in the store. This guide rounds up the best firewood moisture meter UK options for 2026, from budget pin testers to the trusted Stihl and Valiant units, and explains how to use one properly so the reading actually means something. Under UK Ready to Burn rules, firewood sold in small volumes must be below 20% moisture, and a meter is how you check you are there.

How firewood moisture meters work

Almost every affordable firewood meter is a pin type. Two metal probes press into the wood and the meter measures the electrical resistance between them. Water conducts electricity and dry wood does not, so the wetter the log, the lower the resistance and the higher the reading. It is simple, fast and accurate enough for firewood, which is all most people need.

The one rule that matters more than the meter you choose: always test a freshly split face. The outside of a log dries first, so pressing the pins into the bark or a weathered end gives a misleadingly low reading. Split a log, push the pins into the fresh inner face across the grain, and read that. We cover the technique in full in how to use a moisture meter on firewood.

What to look for

Species settings. Different woods conduct slightly differently, so meters with multiple species or wood-group modes give more accurate readings across oak, ash, birch and softwoods. A clear, ideally backlit display. You will often use it in a dim log store or at dusk, so a readable screen earns its keep. A sensible range and resolution. For firewood you want a meter that reads comfortably around the 15 to 30% band, where the ready-to-burn decision is made. Build and pins. Firewood is hard, so replaceable pins and a solid body matter if you test a lot of logs.

The best firewood moisture meters UK

Budget pin meter (Dr.Meter and similar): best cheap option

If you just want to know whether your logs are ready, an inexpensive pin meter such as the Dr.Meter does the job for very little money. These read moisture across a wide range, switch between wood modes, and are accurate enough to tell a ready log from a wet one, which is all most people need. The trade-offs are a plainer display and less rugged build than the premium units. For a first meter, it is the sensible starting point. Check the current price on Amazon UK.

Valiant Firewood Moisture Meter (FIR421): best all-rounder

The Valiant is the firewood specialist’s favourite in the UK, and the current FIR421 adds a backlit colour display that shifts colour to flag whether wood is wet, drying or ready, on top of the numeric reading. It has multiple modes for different species and is designed specifically for logs rather than general building damp. If you want one meter aimed squarely at firewood, this is the pick. Check the current price on Amazon UK, and see our full Valiant FIR421 review.

Stihl Wood Moisture Meter: best premium choice

The Stihl is the one to buy if you want the most robust, accurate reading and do not mind paying more. It is simple, tough, highly accurate on firewood and has a backlit screen. There are cheaper meters that get you close, but for heavy seasonal use checking a winter’s worth of logs, the Stihl feels built to last. Check the current price on Amazon UK, and read our Stihl moisture meter review and the Stihl vs Valiant comparison.

Brennenstuhl Damp Detector MD: best if you also check damp

If you want one device for firewood and household damp, the Brennenstuhl Damp Detector MD is a versatile pin meter that reads moisture in firewood as well as walls, plaster, soil and concrete. It is a good pick for a general household tool that happens to handle logs well, rather than a firewood specialist. Check the current price on Amazon UK.

Proster Wood Moisture Meter: best for mixed species

The Proster reads moisture up to very high percentages with a tight margin of accuracy and switches between wood-group modes covering a wide range of species, which suits anyone burning a real mix of timber. It is a capable mid-price meter that balances features against cost. Check the current price on Amazon UK.

Prices and availability change constantly, so always check the current price before buying, and buy from the site’s Amazon UK listing rather than trusting any figure quoted elsewhere.

What reading are you aiming for?

The target is simple: 20% moisture or below is ready to burn, and lower is better, with the sweet spot often around 15 to 18%. Anything above 20% will be harder to light, throw less heat, and produce more smoke, soot and creosote in your flue. Under the UK’s Ready to Burn rules, wood sold in volumes under two cubic metres must already be below 20%, but if you season your own logs a meter is the only way to be sure. We explain the numbers in what moisture should firewood be and the law in Ready to Burn firewood rules. For the wider context on the scheme, see the government-backed Woodsure Ready to Burn guidance.

Four things that make a firewood moisture meter read wrong

A firewood moisture meter is only as good as the reading you take with it, and four things throw a reading off far more than the difference between a cheap meter and an expensive one.

Cold wood reads low. Pin meters work on electrical resistance, and resistance rises as wood gets colder, so the same log tests lower in a January log store than it does in a warm kitchen. Delmhorst, which has been making resistance meters for decades, puts the safe band at a wood temperature between 10C and 32C and says a correction is needed below it, upwards, because the meter is under-reading. That matters in a British winter more than anywhere: an unheated store sits at 2 to 5C for months, so a log that reads 19% out there is not necessarily under 20%. If a reading is close to the line, bring two or three logs indoors for a few hours and test them at room temperature before you decide. (Correction tables, Delmhorst)

Warm wood reads high, for the same reason. A log that has been sitting in front of the stove, or on a sunny south-facing stack in August, will test a little wetter than it is. It is a smaller problem than the cold one, but it is the reason a log tested indoors and the same log tested outside can disagree.

One log is not a sample. Moisture varies across a stack far more than most people expect: the outside of a pile dries faster than the middle, the bottom row picks up ground damp, and a single large round can still be wet at the core when the splits around it are ready. Test several logs from different parts of the store, from the middle of the pile as well as the face, and go by the wettest ones, because those are the ones that will hiss.

The species setting is not decoration. Different woods conduct differently at the same moisture content, which is why meters carry species or wood-group modes and why manufacturers publish species correction tables at all. Set it for what you are burning, and if your meter has no setting, treat readings within a percent or two of 20% as inconclusive rather than a pass. (Species corrections, Delmhorst)

None of this makes a cheap meter useless. It makes the 20% line less exact than it looks, which is the argument for aiming at 15 to 18% rather than creeping up to 19.9% and calling it done. Under the Air Quality (Domestic Solid Fuels Standards) (England) Regulations 2020, wood sold to households in units of less than two cubic metres has to be at or below 20% moisture already; the meter is for everything else, which means the wood you season yourself, the bulk load that arrived on a trailer, and the bag that has sat in a damp shed since last winter. (SI 2020/1095, legislation.gov.uk)

Do you actually need one?

For a few pounds, yes. Burning wet wood wastes money, coats your glass and chimney in tar, and raises your risk of a chimney fire, while a meter pays for itself by confirming when your logs are genuinely ready. If your readings keep coming back too high, the fix is better seasoning, covered in how to season firewood to under 20%, not a different meter.

Frequently asked questions

What is the best firewood moisture meter in the UK? For most people a mid-price specialist like the Valiant FIR421 is the best all-rounder, with a backlit colour display and firewood-specific modes. The Stihl is the premium choice for accuracy and durability, while a budget pin meter such as the Dr.Meter is fine if you simply want to confirm logs are ready. All are widely available on Amazon UK.

Does cold weather affect a firewood moisture meter? Yes, and it makes the meter under-read. Pin meters measure electrical resistance, which rises as wood gets colder, so a log tested in a freezing log store shows a lower moisture figure than the same log tested warm. Delmhorst puts the no-correction band at a wood temperature of 10C to 32C. If a reading is close to 20%, bring a few logs indoors for a few hours and test them at room temperature.

How accurate are cheap moisture meters for firewood? Cheap pin meters are accurate enough to tell a ready log from a wet one, which is all firewood needs. They measure electrical resistance between two pins, and while they are less precise than premium units and can vary a percent or two, they reliably show whether wood is above or below the 20% ready-to-burn threshold. Always test a freshly split face for a true reading.

What moisture reading is ready to burn? Firewood is ready to burn at 20% moisture or below, with around 15 to 18% ideal. Wood above 20% is harder to light, gives less heat, and produces more smoke and creosote. Under UK Ready to Burn rules, firewood sold in small volumes must already be under 20%, but if you season your own you need a meter to confirm it.

How do you use a moisture meter on firewood correctly? Split a log first and press the meter’s pins into the fresh inner face, across the grain, not into the bark or a weathered end. The outside of a log dries faster than the core, so only a freshly split surface gives a true reading. Test a few logs from different parts of your stack for a representative picture.

Are pin or pinless moisture meters better for firewood? For firewood, pin meters are the better and cheaper choice. They read the moisture inside a freshly split log by measuring resistance between the pins, which suits the irregular shape of logs. Pinless meters scan a flat surface and are aimed more at boards and flooring. For checking firewood, an affordable pin meter is all you need.