YAMRON 4-in-1 Soil Moisture Meter Digital Plant Temperature/Soil Moisture/pH Meter/Sunlight Intensity Backlight LCD Display Soil Test Meter for Gardening, Farming and Outdoor Plants

This is the only digital soil meter on the market. All others utilize a magnetically operated needle, that swings in front of 3-to-5 scales. As a result, the user gets rough estimates instead of actual numbers. . It is also one of the few that requires battery power to operate. An electric charge is emitted into the soil and is received in the probe. A circuit board measures the tiny changes and reports the results in digital form. Many competing devices use no batteries. I wonder how their diagnoses work without electricity? . I took the meter to task on the first day. The initially readings were off. AMBIEN LIGHT measured 0, although the meter was under a grow lamp. SOIL MOISTURE measured 95% - very wet, although the dirt was only moist. . After a "break in period" of one day, I tested again on the second. The features proved accurate. On the TEMPERATURE feature, I measured room air. The temperature was 1F higher than my oven thermometer and room thermostat. . . . Excellent! . To test the PH feature. I wet a face towel with water. It achieved a 7.1 reading - neutral. Water was neutral. . . . . Then, I wet a spot on the fabric with vinegar. The reading was 6.0 - slightly acid. Although vinegar was 4% acetic acid in distilled water, I expected a strongly acid reading. So, the PH feature was off by a half notch. . The MOISTURE feature worked to perfection. It measured the potted soil at 20% - dry. Examining the dirt, the moisture held the dirt in clumps, but it was relatively dry. . The AMBIEN LIGHT feature was good. Three grow lamps shined on my 10 juniper seedlings in pots. Each light source had a 100 watt grow bulb, with a 1700 lux rating. Putting the meter under one, it measured 2640 lux. With the added indirect light from the two other lamps, the reading seemed correct. . In the past month, I purchased three other competing soil meters and returned all. They tested grossly inaccurate, or some of their features were inoperative. . On this product, the features worked to perfection, except for PH - half correct. A second problem was missing the ability to measure FERTILITY. A third problem was the small text on the screen for TEMPERATURE and MOISTURE readings. They were very small. Other than these three shortcomings, I ranked it the best among the many soil meters available on Amazon. . . ------------------------------------------------------------------------------------------------------------------------- . . UPDATE: After two months of usage, the unit became non-functional. First, it no longer showed moisture. Second, one-fourth of the LCD screen went blank. . I contacted the vendor for warranty repairs/replacement. Within an hour, it responded with a request for a video of the unit in action. In compliance, the unit was turned ON. The regular screen appeared, indicating NO PROBLEMS. .

I'm very happy with my order, the device is quick and accurate. I like the probe I can check the ph in the root zone easily. Quality build easy to read, definitely a good product. Check ph ,lux,and saturation with ease.

I have owned a Yamron tester for many years. It remained accurate and performed much better than other soil testers I previously had. My adopted 2 year old black lab removed it from my plant table causing all except the moisture gauge to Not work. After 1 year of taping it together I purchased the new more versatile one. The soil moisture readings are the same on both. That says something for build, technology and quality!

I bought this as a gift do can’t verify how it works. However it looks pretty self explanatory and easy to use. For the price it seems well made and I hope the recipient likes it.

I liked it a lot. It was easy to read and accurate. I tend to over love my outdoor plants so it's helped a lot keeping me on task. It worked great. Until I forgot and left it outside then it deluge rained all day. My bad. So, it's not waterproof, FYI.

This 4-in-1 soil probe claims to measure moisture, temperature, pH, and light. After testing it alongside an analog probe, I’d say it performs well in two areas, is questionable in one, and underwhelming in another. What it does well: Moisture – Accurate and easy to read. My analog probe uses a 10-point scale, while this one gives a percentage. After recent rain, this probe still showed high moisture in my tomato buckets, which matched the heavy feel of the soil. Temperature – Very helpful. I've been monitoring heat in different colored buckets (thanks to some advice from ChatGPT), and this has helped me take steps to manage soil temperature, especially during flowering and fruit set. Backlit Display – A nice bonus. I usually check plants in the evening, and the digital readout is much easier to see than trying to guess readings on an analog dial. What’s uncertain: pH – Still evaluating. It read distilled water as neutral, which is promising, but it doesn’t match my analog probe. I’ve ordered a third method to verify accuracy. If it turns out to be reliable, it would explain a lot about some of my plants' struggles. What falls short: Light Measurement – Disappointing. The meter maxes out at 9999 lux, which isn’t enough to measure full sun accurately (often 60,000+ lux). It gave the same reading for full sun and shaded areas under 40% shade cloth, so it's not sensitive or accurate enough to guide grow light or shading decisions. Also worth noting: lux measures light visible to the human eye—not necessarily what plants need. Bottom line: This is a good option if you're looking for a combined moisture and temperature probe, and possibly pH once verified. But for measuring light—especially for gardening or grow lights—this isn’t the tool. Ask ChatGPT for better light meter suggestions. UPDATE: I returned it. I conducted a calibration experiment with distilled water, alkaline water, and acidic water (1/2 cup H20 to 1 tbsp of distilled vinegar. I started with the distilled water (which should read 7 - neutral) and the calibration was off from the get-go. My analog probe read it correctly, but the digital read it at 4.2 pH. If you purchase run this experiment to see if the sensor is working for you.

A great tool when you’re wondering if your plants are stressed from lack of water. Eliminates over watering. I can’t believe I haven’t owned one before. Great purchase.

This is a 'pretty accurate' soil pH tester. I read reviews claiming inaccurate pH readings, but this is probably due to user error, unless the unit is defective, which can happen. I was originally getting very low acidity scores in the 3s, but figured out why. The number 1 cause was testing with the lawn soil extremely wet after watering the lawn. Front lawn readings were in the 3s, which was watered. My backyard and several neighbors' dry lawns had more acceptable readings, ranging from 5.3 to 7.5, which is nearer the target zone for lawns. Next, I verified accuracy by testing tap water, vinegar, and ammonia, and each provided expected pH scores. Tap water read 6.9-7.1 (which I was happy to see for obvious reasons), vinegar 2ish, and ammonia tested 11ish, which verifies this device is mostly accurate. While this may not be 100% pinpoint precise, it's definitely good enough to get you moving in the right direction and will assist in reaching the target range for a lawn, which is 6ish - 7ish. To be fair, I can only comment regarding pH testing, since that's the reason I purchased it.

Works well

土のPHがすぐわかり助かりました。

Really good product

Ce testeur 4 en 1 est exactement ce qu’il me fallait pour mieux comprendre les besoins de mes plantes. Il est à la fois simple à utiliser et très complet ! ✅ Les points forts : Lecture claire sur écran LCD : l’écran est bien lisible, même en plein soleil. On voit en un coup d’œil les 4 données essentielles : humidité du sol, température, pH et intensité de la lumière. Multifonction : j’adore pouvoir tout mesurer avec un seul appareil ! Ça m’aide vraiment à ajuster l’arrosage, vérifier si mes plantes reçoivent assez de lumière et même tester l’acidité du sol pour les plantes plus exigeantes. Facile à utiliser : on insère les sondes dans la terre, on appuie sur un bouton, et hop, les mesures s’affichent. Aucun calibrage compliqué ! Idéal pour intérieur comme extérieur : je l’utilise autant pour mes plantes d’intérieur que pour le potager, et les résultats sont cohérents et utiles. Léger et portable : facile à transporter d’un coin du jardin à l’autre sans s’encombrer. Ce petit outil m’a permis d’éviter des arrosages inutiles et de mieux comprendre pourquoi certaines plantes ne se développaient pas comme prévu. Un vrai allié pour le jardinage, que vous soyez débutant ou passionné.

Easy to use and easy to read. Valuable tool in my greenhouse.