Apera InstrumentsLLC-AI3719 PC60-Z Bluetooth Multi-Parameter Smart Tester Powered by ZenTest Mobile App, Measuring pH/Conductivity/TDS/Salinity/Resistivity/Temp.Carbonfree Certified

First, I like this meter. It is a trusted brand with growers. And it's IP67 waterproof ("6" in the 67 is the highest standard for solids and dust and the "7" means protection against full water immersion for up to 30 min up to a meter) also, it floats. A nice touch is the case. Very sturdy and from the pic you can see cutouts for everything, even a place to hold the test/sample caps while measuring. A nice extra touch. Concerning calibration solution. Seems more expensive than the powers, however, they depend entirely on you having distilled ph 7.0 water. Once you open a jug of water, the ph starts to drop (absorbing CO2) and water likes to be stable at about 5.8 or so - not good for testing. The testing solution is stable and according to Apera, with proper cleaning of probe, can be reused up to 10 times. Just store the solution in the provided test cups.As far as measuring, it's accurate, easy to see and simple calibration (cycle power after each finished cal or it will try to do an extra cal, like 10.01ph which isn't included). The meter feels solid and is encased in heavy duty clear plastic. I have 3 TDS meters and 2 ph meters and could have saved money by buying this meter first and a lot of headache over incorrect ph readings. For the piece of mind it's worth it.Now as far as the app goes. The ZenTest app that works with the bluetooth function for the PC-60Z, is in need of attention. The app has a very poor rating in the Android store and on the first day I installed it, the app crashed and then refused to function. Had to uninstall and reinstall. It has worked since but I am not as confident in the app as the meter. The manual states clearly that it is not for the bluetooth portion of the meter. Got to go to the web for any howtos. If you look at the last pic, that tells a story of this app. For reference it should be "asset and here" not "assect and heree". Small details make a big difference.I could go on about feature requests for a long time but one would be a cycle function. Like autosave but takes 1 (or more) sample from each measurement then autosaves like normal to an asset instead of manually changing to each one. The app has potential once you dig around a bit. Also would be nice to be able to stack data into one file. Currently every save, even to the same asset, creates a new file.Overall I would recommend the meter, it gets the 5 stars. The app gets 3 for trying.

So far so good! Easy to use/calibarateVery accurate, The company puts a lot of thought and effort into their products has a laminated instruction sheet how to calibrate comes with everything you needLove the case it comes with!

This pocket size hp meter is the perfect instrument to measure water quality of my pool, as well as my drinking water. The measuring results are consistent with around 0.01 accuracy. Simply calibrate the tester with the solution in the box and start using it. I used my phone to connect the tester via Bluetooth, makes it easier to monitor and record the data. I set the alarm to ph 6.5-7.5. So when the measurements are beyond the range it’ll fire up an alarm. There’re so many functionalities in such a compact design, definitely worth the price.

App: I like this meter with Bluetooth function. You can download the app from app store if you use Apple iPhone. It is very easy to navigate the app. You do not have to write down your readings anymore! You can also get a fancy chart.Meter itself: it is a fancy kit with everything you need to start the testing. I used it to mix my nutrient for my plant. Amazing to use!Also love the traveling case with instructions, which allows easy storage without the need to store the instructions somewhere else (which I may not find later.)

After trying to work with with this meter for the past 6 months... simply because of the wireless aspect, I've given up and replaced it with BlueLabs. This thing is absolute junk. As other have mentioned it is NOT water proof in any way. Perhaps water resistant like a cheap watch is drip/splash resistant... You can let it dry out and it'll work again.. but that's only the start of the issues. If my phone is paired with any other bluetooth device the app refuses to connect to the meter. So good luck working in your garden and listening to music even.. The meter typically takes 30-60 minutes to get a mildly accurate reading. Take it out of the solution, cleann/rinse and put back in.. wait ANOTHER HOUR and get a _completely different_ reading. Like from 700ppms to 300! Drop in some cheap-o $20 meter get the same reading in seconds. pH.. hahahahaha never ever accurate, nor does it stabilize. Again cheap-o $25 meter immediately gets an accurate reading. I have babied the crap out of this device, keeping it clean, calibrated once per month (btw the built-in calibration reminders have NEVER worked). The app is annoying at best. You either create an account (which you have to login EVERY TIME you want to use) or you are constantly selecting "visitor" mode.. why? Oh and the best part. push the mode button on the pen or from the app and watch the magic not happen. Daily i'm pushing the mode button anywhere from 5 to 20 (yes I mean it) times to get it to switch between modes. This thing is junkier than the cheapest meters. Oh and like others said.. Just TRY to get rma replacements of of these folks.. yeah right. I even bought a replacement sensor for $100 thinking I somehow damaged it. Nope. Still works like crap. DO NOT WASTE YOUR $$ ON THESE PEOPLE.

The meter has everything I wanted, and I have little issues with using it or calibrating it. I use the Bluetooth on occasion when I want to record readings for future reference. Bluetooth is quick to connect to my phone, and the app is easy to use.If you like to keep your pH meter in soaking solution, this pen makes it a bit harder to do. The TDS probes can't be left in the soaking solution without getting ruined. I have to fill yp the protective cap to a level that covers the pH bulb, but not so much that it comes in contact with the TDS electrodes.