YINMIK Digital Soil pH Meter for Gardeners, Soil Direct pH Tester for Plant Care, Measure pH of Solution Potting Soil Growing Media,Great for Indoor,Greenhouse,Outdoor,Garden, Lawn, Farming, Yard Use

I’m actually having trouble expressing to others how satisfied and pleased I am with this $70 investment. Please take my money! I grow blueberries as a hobby and have 35-different blueberry varieties growing in my backyard with specific and different PH requirements. If PH in my soil or the water is off slightly the blueberry plant leaves will yellow and the plant will die. It’s the most important aspect of growing healthy berries. Over the past 6-months I have tried 6 different $25 PH meters from Amazon. I felt bad returning them all back to Amazon for a refund but the truth is they were unreliable and inaccurate. I even bought 2-identical meters side by side and got different readings. At this price point they all suck and I cannot understand how they maintain a 4.5 or better review rating score. I learned the hard way, $25 PH meters are all junk, you have to pay more if you want an accurate reading. When I found this bad boy I was filtering by highest cost and was ready to pay big bucks for my next meter. At $70 this meter comes with an extra probe and a nice protective storage case. It’s priced fairly and is worth the money. Extremely easy to use, calibrates quickly and is accurate. The only issue I see is the glass probe is very fragile and you have to be careful not to crack the glass. That’s what others were saying in their reviews. I’m glad I ordered an extra probe for $10. Bottom line, one of the best Amazon purchases ever and I’m a very happy customer. Do not hesitate to purchase one. The designer of this new PH meter is a genius and I hope he get rich.

I had high hopes for this meter but the pH tester is completely off. No matter how many times I calibrated it the readings just did not make sense. The build feels decent but what is the point if the most important function does not work right. I wanted something reliable for my soil and nutrient solution but this is not it. At best it is an expensive gadget that gives numbers you cannot trust.

After studying most of the pH testing products listed on Amazon, and reading dozens of reviews (and realizing how much junk is out there). I centered in on the YINMIK YK-S01. My biggest concern was that this product had only been recently released, and only had 3 “Verified Purchase” reviews (and 20 from users who received a free product to review). I was also concerned that there would be no way to validate the readings produced by the tester… ALL of my concerns have been alleviated! The design and construction of this product are five stars all the way (I am a consumer product mechanical engineer by trade. I would be proud to have been on the engineering team!). Hidden in one cryptic phrase in the listing was the best confidence builder they could have provided on the reliability of this tester… these guys provide a complete calibration kit! Using three packets of powder you set up known control samples of distilled water at 7.0, 4.0, and 10.0 pH. After calibrating the tester at these three points, you have a credible reason to rely on the readings you take later in your soil. See my pic showing the colored packets and the three control samples (not to worry… just follow the simple instructions). Yinmik is missing a huge opportunity by not showing the calibration kit in their Amazon listing! The app and Bluetooth connection worked perfectly (the instructions do say that a long press of the ON/OFF button opens and shuts down Bluetooth… maybe other reviewers missed that, or it was added in my version of the instruction sheet). One little heads up in the app… when you click the Save Reading button, all you have done is changed to the reading screen where you can see your reading. To actually record the reading you must tap the little diskette icon in the upper right corner of the reading screen (see my pic with red text and arrow). I missed that detail on my first testing session and discovered later that none of my readings were recorded :-/ Perhaps that diskette icon should be added to the instructions. Everything about the mechanics of this product are amazing! It’s solid, nicely finished, everything works smoothly, it’s easy to use and read. This product has earned my highest recommendation. I certainly found the tester I was looking for!

......accuracy is ultimately based on repeatability, which I found varied significantly even within the same soil sample. The reasons for this is related the moisture content of the sample, as this moisture is the only way to guarantee sufficiently intimate contact with the probe sensor. Yet the manufacturer makes no mention of steps to ensure proper wetting of dry soils and repeated trials to ensure you receive stable readings. I discovered this accidentally and had I not launched into multiple trials and dampness levels, as preliminary readings indicated my soil was very alkaline with readings of 8.4-8.6, which is quite unusual. After I insured reasonable soil dampness over multiple trials, the the readings ranged from 6.4-6.8. I would have been really pissed if I had unnecessarily and detrimentally acidified my soil before planting!

Bought this meter mainly for testing soil. First test I used the meter to check the soil ph of my blueberries in containers. I had a bumper crop last year and want to maintain that zone. Once the probe was calibrated, the readings were consistent and repeatable. Not the cheapest tool, but very valuable if you need accurate measurements. Make sure you know your number before you start trying to adjust or supplement.