Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy, Lcd display

As a scientist I find myself using instruments of all varieties, price points, and complexities, and this pH meter is quite nice indeed. It’s clearly in a much more serious league than the 11 dollar “competitors” available on Amazon or at gardening shops. This meter is easy to calibrate and once set, stays on point. It’s backlight and smiley face feature are great so I can see it in darker conditions and the smile is contagious when my solutions are dialed right in where I need them to be. Remember to rinse after every use and store with cap on and loaded with a little 3Mol KCL solution. This instrument is durable, accurate, easy to use, has nice features, and truly is a professional level piece of equipment of which it’s results can be trusted with confidence. Some of my embryos require an exact pH of 6.25 to stay developing properly and the solution that this pen indicates as being 6.25 pH actually is 6.25 pH. Cheapo other pH pens may indicate that my 6.25 is actually 7.9 or 5.55 depending on which one I’m testing when the actual pH of my solution is 6.25 based both on this meter and confirmed by titration. Spend the money if you actually want to rely on a tool. This is the one.

Summary I was debating between this brand and one of the more popular brands but ultimately went with this due to the "replaceable" tip. I'm glad I did! Pros - Storage case is substantial - made me feel like I bought a true 'scientific instrument' - Came with all the accessories I need! I guess I didn't read the description carefully, but came with calibration fluid as well as storage fluid. There was also a lanyard. - Easy to use! Right off the bat, the device was already calibrated at the factory using all 3 PH values for reference. There is even a certificate certifying the same. I did my own calibration, though, and it was easy to do! (The drawback to doing your own calibration is you'll need the PH 10 reference fluid to complete the trio of calibration. Out of the factory all 3 were done and you'll see an icon L, M, H indicating this. If you do the PH 4 and PH 7 calibrations, you'll get L & M but no H. I'm OK with this but if you need super precision, something to keep in mind.) - Seems accurate based on my drop tester readings (which aren't as accurate because I have to compare color codings). I don't have another reference point so this is my opinion. Cons - As someone else mentioned, the backlight doesn't stay on very long. Not really a true Con for me as I don't need it under the conditions I operate in, but it would be nice to have a setting to adjust how long it stays on. - The storage solution is nice! I ended up using the entire bottle pretty quickly. 2x the size might be nice. It apparently lengthens (or cleans) the probe so I always store it in the solution. The solution seems to rapidly dissipate for whatever reason. More can be bought on its own, however. All in all I am very pleased with this tester. It fits my requirements for hydroponics and nutrient measurements. It was a great price and came with all you need to get started.

I wanted to check the accuracy of the pH sensor our pool had. I also hate using those tester strips which require identifying if the colour is light yellow or pale amber... I mean, really? Plus those strips are calibrated for a specific temperature, so any result you get with them will likely be wrong if your water temp is outside the norm. Anyhow, I hunted around and this seemed to be the one a lot of people recommended. It came in a neat little kit that included everything you needed in a hard shell case - although I'd recommend also buying some extra storage solution as the included amount will not last long. Use is super easy, and it automatically adjusts for temperature. You can also modify the settings so the backlight changes colour if the reading is outside the ideal numbers. I wondered why the case had an empty spot, then I realised that was so you could stand the tester up with the cap filled with storage solution. A really nice touch. If you want to keep it in the case with the lid closed, you just need to remember to store it on the side so there is less chance of leakage from the cap. Keep in mind that if you store it in tap, pool, or distilled water that could damage and permanently impact the accuracy of the tester. They do say that if it is stored dry, then that will also impact the accuracy of the sensor, but this can be fixed by soaking it in storage solution for a few days. Personally, I'd just get the storage solution - it's not expensive, the cap only requires a small amount, and you don't have to replace it after every use so a bottle will last a while. As for accuracy - I don't have a lab quality reference device to test it against, but it definitely appears to be more than accurate enough at least for testing a pool at home. I can't say anything about longevity as I've only had it now for a few weeks, but the sensor is replaceable plus it appears to be well made - so I think it should last well if treated with the care something like this deserves. They do have a newer version of this that has bluetooth and a "new improved sensor". For me this is more than good enough I think, I don't really have any need to track the readings over time, and as much as I am a geek the additional cost didn't really seem to justify it. Overall, very happy with this tester.

I've used this meter for about a month now - it's not perfect, but overall, I'm quite happy with it. PROS: Overall, this meter works well. I've compared its reading to other meters, and I'm happy with the agreement. It's very simple to use, and calibration is quick and easy. I also love that it can be submerged! CONS: I've noticed that reading may be stable (you get the smiley icon) after a minute or so, but if I stir the meter, it starts changing again, and settles on a new (usually lower) value. I can go through a couple cycles of this (stir, wait til stable, stir wait til stable) before it finally settles on a value and always come back to it. It seems that if I leave the meter in the sample for 5-10 minutes, it reaches this value anyway - I'd recommend that approach. Also, not thrilled with the tiny solutions provided, especially the storage solution. I lose a drop or two of that whenever I use the meter (just by rinsing it in DI first), so it's already mostly gone. Ordering replacement storage and calibration solutions will cost you $10-25 depending on bottle size.

Love the thing from the moment I got it working! It comes with 3 uses of calibration fluid and 1 spare use of long term storage fluid after the 1 other use is for when you use it for the first time (2 uses total). From what I gathered, it didn't come with the stuff so I bought a separate box of fluids 😐 I would have returned it but I went though a whole bottle thinking my container was contaminated or it was broken... turns out it was an air bubble 😬 I'll save you a bit of trouble- make sure there isn't an air bubble trapped on your probe when you are calibrating it. You'll know because the calibration numbers will jump around until it turns off but once you get the bubble off, you'll get a reading in seconds.

Needed to PH water tester and after lots of research opted for the Apera PH60. Research easily indicated that going with one of the cheap ($10-$15) testers would lead to inaccurate and frustrating results over time so I decided to spend more and get a quality tester. When I purchased this kit, the price was a good value for all that was included and a strong factor in the decision. It has since jumped up by 25% so I got lucky with good timing. Still, the testing probe is well made, readable numbers with backlight and results have been accurate. I did a calibration upon arrival and it was pretty much right on form the start. The kit includes small bottles of 3 calibration solutions and buffering solution for storage. The case is a nice addition and keeps everything together. Instructions were clear and included on the laminated card in the kit. Make sure to use the buffering solution (good idea to get some extra) to keep the probe tip hydrated and accurate during storage. I chose this model due to it's accuracy, longer life when cared for properly and the complete kit.

This quit working after 1 use. I calibrated it, it worked, but next time I went to measure, it had an “Er” message but with no code, and was frozen on that screen. I left it alone for a week or so, now it wont turn on at all. The return window was apparently 30 days.

Buy more KCL too, you won't regret it. Love this kit though, very accurate meter and its easy to calibrate with what is included here. I've noticed it stays calibrated for quite some time when stored and cared for properly.

Bon produit, un peu lent a stabiliser. j'ai change pour le PC60, pour a peine plus cher qui fait la conductimetrie egalement.

I use a ph meter for plant nutrient solution. Previously, I had a couple of cheap China imports, which seemed reasonably accurate for a while, but don't last long. All ph probes degrade over time, so rather than keep buying cheap, I decided to get a more reliable one with a replaceable probe. This is quite expensive compared to some other brands with good reviews, say the Essentials PH Meter, and @ £29 the replacement probe is not much cheaper than buying a new Essentials meter. However, replacing just the probe reduces waste, and gives you options: there are 4 compatible probe types (all available on Amazon), which you can buy separately as replacements, or to measure different substances. The glass bulb is for liquids, the spear probe for solids, such as foods, soil, the flat probe for paper, cloth, skin etc. And you can buy an ORP (Oxygen Reduction Potential) probe to use with this meter, which tells you the "killing power" of your solution/water (sterilising or not, a simplification of complex subject). The life of the probe will depend on how often you use it, and how you treat it. The probe is supposed to last 12 - 24 months - it's CE rated for 6 months (for safe use), but that's NOT its life expectancy. It CAN be stored dry, without degrading it, according to instructions, but storing it dry will affect its sensitivity. So if you store it dry, for accuracy, you need to soak it in the provided solution before use. It can be stored in the soaking solution, but NOT in purified water. The kit comes with everything you need: soaking solution, 2 calibration solutions, batteries, lanyard (quite a long one), 2 containers for calibration, instruction manuals in English and German, as well as a laminated quick reference chart, all in a hard plastic case. The instructions are clear, easy to understand, and contain all relevant info. Instructions say not to use soaking/storage solutions from other companies, but as long as the same (potassium chloride or kcl @ 3 molar strength) and/or for the same type of ph meter, I don't see why. Will be ignoring that myself (no Apera replacements on Amazon, either). The calibration solutions will last quite a while, the soaking solution is enough to fill the cap to the mark about twice. 2 reviews for the replacement probe said the glass bulb was too exposed and breaks easily. I disagree - the bulb is inside and above the plastic rim, which does have gaps in the side, but doubt it would break if dropped on flat surface. IP67 means it's dust proof, and can be immersed in up to 1 m of water, or for up to 30 mins, depending on info source. It doesn't mean it's hermetically sealed, though. Overall, the meter seems robust, and looks like it will stand up well to any normal use. So far, would recommend, despite quite high price, as seems well worth it, all things considered. Edit: Have been using this for 6 years now, about once per week, and it still works fine. Have not calibrated it in a while, but it seems to be accurate enough for my purposes (fertiliser/irrigation solution for plants). Like the back-light feature, and it's very easy to calibrate. If it keeps switching to settings screen when you turn it on, it means batteries need replacing, the battery icon does not seem to show accurately. Have so far replaced mine once.

他社㏗メーター故障の為此方を購入しました。最初公正に手間取りましたが精度は良いです。丁寧な取説で解りやすかったです。

yes buy, köp

Funciona como debe ser, no hay que calibrar a cada rato, confiable y facli de usar.