RCYAGOPH Meter, Digital 7 in 1 PH/TDS/EC/ORP/S.G/Salinity/Temp Meter with ATC, 0.01 Resolution High Accuracy PH Tester for Drinking Water, Hydroponics, Fish Tank, Aquarium, Swimming Pool

I definitely feel that this is a very good product for the price. Comes with just about everything you will need to use it accurately. It's also Bluetooth and set up in a matter of seconds. It reads instantly and using it by Bluetooth on your phone or tablet, you get every reading in 1 view as opposed to just looking at the unit and not seeing all of the functions at the same time. I think it's very accurate for hydroponics as I'm using it for. It comes with 2 versions of calibration powders and is simple to auto calibrate. Lots of good functions for the price. Replaceable tip as well. I'm very satisfied with it.

This device (BLE-C600) requires an app (YINMIK) which does not appear on the Google Playstore in the U.S. Scanning the QR code directed me to download an APK from a Chinese website. My phone warned me not to do this as it may contain malware. Without the app, things like the backlight can't be turned on, also the screen is too small for anyone in my family to read. No explanation of units or readings is provided with the enclosed manual. I guess if you want to install directly from China and bypass the Google Playstore your result could be different. For me, NO THANK YOU.

I recently convertec my freash water pool to salt water. This meter accurately gives me the salt %, salt ppm, ph, TDS, ORP and temperature. No need for test strips or elaborate expensive reagent test kits. It is also Bluetooth capable, so I read, record and archive all my test results on the phone app. I highly recommend this pool water tester.

I purchased this for hydroponics. Setup was simple and the app works as advertised. Only issue I have is it doesn't come with a TDS solution. Even if you can't calibrate it, you should be able to verify its accuracy. I bought another TDS meter with it that comes calibrated from the factory. This meter measures twice as much TDS/EC as the other meter. I also have another TDS meter that is a few years old that measures less than both of them. (Of course I assume it has fallen out of calibration which is why I purchased a new one.)PH was in range with other meters before calibration and using two different calibration solutions so I believe the PH function is accurate. Having doubts about the TDS. Will have to buy a TDS solution to verify.So far so good with the app.**UPDATE**Received a TDS calibration solution of 1000ppm. This meter measured exactly 1000PPM. My other TDS meter (A Home Forest model) I had purchased that supposedly comes calibrated from the lab, only measured around 700 ppm. It varied a bit. Guess I will review it and return it.Solid meter so far.

The tester works well, it is not amazing, but is better than trying to figure out test strips discrepancies. The calibration isn't hard once you've done it a few times, it will become second nature. If you have multiple tanks of water to test a day it is very fast to check with this pen. APP - I tried too many times to get the app to work with IOS. Have not tested Android. I don't believe there is any customer service in US, and their documentation and video guides are cryptic. SO... you may have a hard time at first or feel like it's a scam... It's good for the price though. Used for 6 months so far.

This probe records all data right to your phone. It makes it easier when keeping up with aquarium levels . I have 11 tanks and this probe makes things much easier . Easily connects , not hard to calibrate . Excellent buy

I didn't think I would like it so much as most of these cheaper meters seem really inaccurate.That is not the case here. It does require calibration like any good meter, but having all those testing tools in one unit, is amazing.Additionally, the ability to hit two buttons on the app and have all the data saved, makes checking multiple readings infinitly more convent then pick up tool, test, set down tool, log data, pick up next tool.Love it!! Want another one!

The media could not be loaded. I was very hopeful with this product but unfortunately am left with disappointment. As you can see in the recorded screen (I have an S22 Ultra so it's not a spec problem), not only does the app not save data, but the backlight doesn't turn on when opted in and unfortunately the reading is not accurate before or after calibration. I would definitely not recommend this product as it's a waste of money for a device that shows an almost accurate temperature.