[REVIEWS] Moisture meter for wood: HQRP JT-4G Wood / Firewood Moisture Meter

I had a problem with my firewood when the logs did not burn as I expected, and this made me quite annoyed because it happened many times, and I still not have a clue yet. After that, I went online to find out the reason hence until three months ago I ordered a wood moisture meter on Amazon. With a price of less than 10 $. Does it really work well?

Today’s product is called HQRP JT-4G Wood / Firewood Moisture Meter – Wood, Firewood, Wall Damp Meter 4-Pins, and Home Inspection Tool


This moisture meter has a compact design with dimensions of 144x94x50mm; Simple design consists of 2 main parts: body and 4 steel probes.

  • The body is a gray rectangular shape, curved at the top, a large LCD screen is positioned high near the top of the device, below it is two yellow buttons Hold and Power. In two sides of the machine have embossed lines that help prevent slipping when held.
  • The connection between the body and the detector is a yellow plastic sheet. 4 steel probes are designed to be small and sharp.
  • Besides, the product also accompanies with a storage pouch that will help users bring it more convenient while the product is kept safely in the bag.
  • The device has been equipped with one 9V battery


According to the product information, it can measure the containing water of wood, bamboo, cotton, tobacco, paper, foodstuff, etc.

  • Test Range: 5% to 40%
  • Resolution: 1%
  • Accuracy: 1%
  • Measuring Range: 5% – 40%
  • Can hold value
  • Symbol and unit display, read and get conveniently

Low battery symbol “- +”; –

Operation temperature: 0’C to 40’C.

After using it for 3 months, tested on my firewood. My experience showed that it worked well on firewood and I found the cause of the problem I encountered, my wood was usually 15 inches long and typically are oak, and some birches were separated and dried for once or twice in the wet season ( in the summer, frequently).

I tried to measure it at the cutting heads first, and it gave the index 15% -20%, which is a good indicator for firewood, it will burn perfect. But when I split the wood and tested new surfaces, a new result appeared and usually 25% -30%, an index would result in smolders, spits, and hisses. Therefore, this moisture meter told me that my firewood only dried a small piece from the cutting head and it was not dried long enough so that all my firewood was completely dry.

I also tried to check if the probe’s directions affected the measurement results. Ie whether you align the long gaps with the grain or across the grain, or whether you stick the pins into the transverse cut such that they are parallel to the rain. In general, it gives the same results, and these directions do not affect the result.

This device is straightforward to use. With 4 steel sharp probes, how to plug in wood to get high-precision data is also a concerned point. You do need to push a bit – I find that if they are not properly pushed into the wood, I get artifactually low readings. My sense is that once they are pushed in beyond 1mm or so, further pushing has little effect. That’s important – the meter would be unreliable if the reading were proportional to the force, but once beyond a certain threshold I don’t think this is the case.

The Hold feature is useful. Stick the prongs into the freshly cut surface of the split, going with the grain. If you can’t see the screen from that angle, press Hold and you can pull it away to view the percentage.

A problem with this moisture meter, it will occasionally turn on automatically, and this will consume battery power very quickly. The remedy, you should remove the battery when you do not use it for a long time.

In my opinion, if you use the device to know the exact moisture level for woodturning or other projects. You should spend for devices at higher prices.

My verdict

Score: 8/10


  • Low price only $ 9.91 on Amazon
  • The device is simple and easy to use
  • Works well on firewood


  • The power button is effortless to turn on; battery drain is fast
  • Not suitable for big projects


Overall, this moisture meter is the right product for firewood. It is appropriate to be a household device. If you have problems like me, try the experience with this device.