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2.8 out of 5 stars
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27 of 27 people found the following review helpful
This meter is exactly what I wanted, an in tank all in one device. I put some Velcro on the back and not it's stuck to the front of my grow tent. Very convenient. Easily removed from rez for use testing solutions on a mixing bench.

First warning! Make sure you have calibration solutions before you begin relying on this instrument! Mine came mis-calibrated right out of the box. The ppm reading was 1150 when it was actually 950, and it was registering pH +.5. After the initial calibration I tested it 10 days later and the pH was +.08 (7.08/7.00) off and the ppm was dead nuts on (1500/1500 +/- 10 ppm). This meter is in continuous use, I leave it on and in the reservoir. After it's calibrated it works great! The screws on the front make calibration easy.

Second warning (minor)! Keep the unit well charged (or plugged in) because the ppm reading becomes erratic when the battery gets run down. It also help accuracy if you shake the EC probe in the solution, especially if it's sitting in the rez. The pH probe seems to have no accuracy problem just sitting there.
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21 of 21 people found the following review helpful
on June 11, 2013
Verified Purchase
This meter has a few problems that I'm going to pint out, but that being said, I've been able to make very good use of the unit I purchased here. First thing I want to point out is that, in spite of what other reviewers have said, this unit does NOT have batteries. The reason folks have gotten that impression is that the maker has installed some back up capacitors to maintain readings and calibration when moving the meter from it's operational location to a place where it can be calibrated. Capacitors act somewhat like batteries, but hold their charge for a much shorter time. Some reviewers have said that it loses accuracy as the batteries go dead. This is because the voltage falls off much faster near the end of a charge on a capacitor than on a battery.

Issue #2: I've never seen a ph probe that didn't require that it be stored in a solution of some type, the most common, and the best, being Potassium Chloride, and this is what every meter's ph tip I've ever purchased came packed in. The solution is placed in the protective tip cover and keeps the tip wet. This meter had no solution in the tip cover, at all. There did appear to be a bit of crystallization around the glass bulb, indicating that solution may have been present and had dried up. But, if a probe is dry for very long, it becomes totally inaccurate, yet this probe seems to be working properly. If these probes do not require being stored in solution, that would be a huge plus, but I can't be certain of this, as I've never heard of such a probe when consulting experts at the manufacturer's tech support, and here is where another problem arises--lack of support.

Issue #3: The manufacturer of the unit isn't identified, other than to say that it's made in China, and the company that is selling it won't tell me if they have designed the meter and commissioned its build in China, or if they are buying a generic meter offered by some unidentified Chinese distributor. so, if yo have problems with it, expect NO support, other than the offer of an exchange under warranty by the seller. And when the probe dies, as all ph probes do, getting another one from the seller, or the maker, will likely be impossible. However, as the probe connects via a BNC connector to the meter, any other brand of probe can be substituted when the need arises, which it will.

Issue # 3: In spite of the fact that the instructions say to calibrate this meter using the 6.8 calibration screw and the 4.0 calibration screw, the meter has only the 6.8 screw. Every other meter I've ever seen calls this the 7.0 calibration screw, and the instructions that come with this meter even call for a 6.8 calibration solution. However, the 7.0 works just fine with the meter. You won't need to search the planet for 6.8 solution. How does it work with only a single calibration point? Not that well, as when I get it calibrated at 7.0 and then ask it to read the 4.0 calibration solution, it's off by about 2 tenths. However, this isn't a huge error, and the ph of soil or hydro solutions isn't written in stone and can vary over quite a wide range without harming your plants, and when I put this meter's probe in my nutrient tank alongside of the probe from my more costly NutraDip Trimeter ( http://www.amazon.com/ND1100042-Nutra-Dip-continuous-meter-Temperature/dp/B0001XGQ2C/ref=sr_1_3?ie=UTF8&qid=1370978825&sr=8-3&keywords=trimeter , WHICH IS NOW ALSO BEING MADE BY HANNA IN EXACTLY THE SAME FORM ( http://www.amazon.com/Hanna-Instruments-Tri-Meter-PPM-TEMP/dp/B0012BMEVY/ref=sr_1_2?ie=UTF8&qid=1370978953&sr=8-2&keywords=trimeter ), I get an identical reading, though this meter reads to 2 decimals instead of the Trimeters single decimal point, which is nice. It's also worth noting that there is a rubber slip cover on the unit that appears not to come off, but it will slide over the temp/EC probe if you stretch it. This cover has a second set of 2 holes below the one for the 7.0 adjusting screw, which would indicate that there is a more advanced version of the meter out there with as many as 3 calibration points and screws for ph. There is also a hole for a 2nd calibration screw in the EC area of the meter. I've asked the seller to ask the maker about this and to tell me if there is a higher grade of the meter being made. They offered no answer, at all!

So, if you are experienced with ph meters, have a bit of technical knowledge and possess a good green thumb, this meter can work for you, and even save you a few bucks over the other trimeters out there. However, it's only a few bucks saved, and it just may not be worth messing with for that little savings, when the guys at NutriDip make a great meter and will give you excellent support, even via phone, if you can deal with the time difference to Australia, where the meter is made. I own 2 NutriDip Trimeters and have never had a complaint about either. I even had one that was in use outdoors get it's plastic case melted a bit by the intense central California sun. It still worked fine, and they replaced the case for me--no charge! And Hanna now make an identical meter here in the states, or at least the company's offices & support are in the states. But, personally, I like the support at NutriDip better. Happy farming!
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5 of 5 people found the following review helpful
on March 28, 2014
Bought this product about 8 months ago and at first it worked great, the meter was accurate all the time and didn't have to be recalibrated. Not sure why others are saying it changes every few days, I never had that issue. I would also point out I use pH meters frequently and teach science classes, so I know how to use them. The issue I am now having is that it suddenly began "spazzing out" (for the lack of a better term) whenever it's plugged into an outlet that has other electrical devices (with high wattage) running next to it. Not sure what caused this issue, it seemed to come out of nowhere, or how it can be fixed but i'm sure it has something to do with the electrical components because when i move it to an outlet with nothing else plugged in, or when I take it off the electrical connector, it works just fine.

Overall I would say if you're buying a product like this for hydroponics then that means you're fairly serious about it and you're probably going to want to buy something that's better quality and will last longer. The product seems to be cheaply made, there was no calibration solution that came with it, and absolutely no technical support that I could ever find (these are all bad signs of a company who makes cheap products). In the end you'll end up like me, ready to spend more money on a tool I've already purchased once.
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2 of 2 people found the following review helpful
on June 29, 2013
Verified Purchase
Easy to use and calibrate. Remember that it gives false reading if ballast on nearby. Just unplug it for reading, then plug back in. Probes are adequately long, as seem to be well built. Also shake or rinse them off occasionally.
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2 of 2 people found the following review helpful
on April 25, 2013
Verified Purchase
I received the meter and found it to be out of calibration right out of the box. I purchased the calibration fluid and tried to adjust it. Turning the calibration screw forever will adjust it to .5 ph below being accurate.

UPDATE 9/4/2013: The ph display partially quit working a few months ago. Replaced it with a Hanna ph pen that works flawlessly!!
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8 of 11 people found the following review helpful
on November 28, 2012
Verified Purchase
until I realized I couldn't get it to STAY after setting/calibrating the PH, am unsure about the ppm readings because I had no control solution (meters usually come supplied with these things) so after going out spending more money on calibration solutions, I still could not get it to stay spot on, which is why I purchased it to begin with.Had to recalibrate prior to using both times, and on my 3rd time trying to use it, the LED display was just dead, tried unplugging probe & reinserting, nothing worked.
Would so not recommend this product, now I have to either wait for another and hope that it, too, isn't a lemon, or find another product.
edit: hydroponics pro dealt with my concerns in a very professional manner and are sending me a label to ship it back for refund, let this not be a reflection of the company, think they just had a bad meter.
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1 of 1 people found the following review helpful
on August 9, 2013
Verified Purchase
I have had to re-calibrate twice so do not just believe it.

other than that it is working great.

it got here quick and I live that I can mount it on the wall outside of the closet.
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1 of 1 people found the following review helpful
on June 14, 2013
Verified Purchase
Not sure how but broke the end off the ph probe in a week, seems to work ok and there supposed to be sending me a new probe free of charge. Also don't like that temp is only in C, I don't live in Europe and this is 2013.
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1 of 1 people found the following review helpful
on February 24, 2013
Verified Purchase
Works great. I like that it is battery powered (comes with wall charger). It makes it easy to test multiple tanks with one unit.
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on July 3, 2014
Verified Purchase
Great product for the price. No solution, so you will have to make sure to set it from the box and with 3rd party ph test agents. Not had the problems other have reported, always stayed on point with Ph measurements and temps. Worked great until I loaned it out to someone else and they broke it. I used it for 6 months with no issues at all, hard to beat for the price. The capacitos they added to this unit is a very useful feature.
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