This is my 2nd Bluelab pen, my first one lasted me well over 2 years. Accurate and easy to care for.

En este caso, la reseña va dirigida al Ph y su importancia en el agua. Sea de acuario, grifo, botella u otro líquido (aquí habría que pasarla por un limpiador o cleaner), si se tiene un sistema de suministro de CO2 en un acuario con sonda fija o no se tiene nada, saber el ph en todo momento es crucial. La sonda ya peca de algo esencial, tres cifras significativas. Pero a cambio te devuelve dos cifras exactas. No hay error. No hay que seguir con líquidos. Y Amazon la tiene a un precio ridículo. Así que, sin más, es la sonda para acuariofilia y otros hobbys o usos que se le quieran dar.

These are quality. I get a new one every yr or so. They should be good for around 18 months I read. For $100 the peace of mind it brings is priceless. Gardening can be hard enough so this in conjunction w the EC meter make it quick n easy.I wish the backlight stayed on longer and it takes it a minute to settle in and give u an accurate reading. My only 2 complaints.

Der Bluelab pH Pen hat mich voll und ganz überzeugt! Als regelmäßiger Nutzer für meine Pflanzenpflege und Hydrokultur kann ich die Qualität dieses Produkts nur loben. Die Messungen sind unglaublich präzise und zuverlässig, was für den Erfolg meiner Pflanzen entscheidend ist. Der Kalibrierprozess ist einfach und schnell, sodass ich immer genaue Ergebnisse erhalte.Das Design des Pens ist ergonomisch und liegt gut in der Hand, sodass das Messen mühelos und komfortabel ist. Zudem ist der Display gut ablesbar, selbst bei schlechten Lichtverhältnissen. Die automatische Abschaltfunktion und die lange Batterielebensdauer machen ihn zu einem sehr praktischen Gerät für den täglichen Gebrauch.Was mir besonders gefällt, ist, dass der Bluelab pH Pen sowohl für den privaten Gebrauch als auch für den professionellen Einsatz geeignet ist. Er ist robust, langlebig und bietet einen hohen Mehrwert für Gärtner, die auf eine präzise pH-Wert-Messung angewiesen sind.Für alle, die eine exzellente, einfache und zuverlässige pH-Messung suchen, ist der Bluelab pH Pen die perfekte Wahl! Eine klare Kaufempfehlung – ich werde ihn definitiv weiterhin nutzen und freue mich über die Ergebnisse! 🌱✨

I have been using these for over 10 years so I know how to use it. It’s just stuck at 7.0 no matter what. Calibrated 2 times. Nothing. The one I bought over an year ago also stopped working so now I have just purchased a third one so I can return it and if this one doesn’t work, I’ll never use blue lab again unfortunately! Update. Blu lab returned my money. They still have me as a customer.

I have purchased this unit twice so far. Once in 2009 and again in 2018 and it looks like the end is near for the 2018 unit. Rarely needs calibration and really a pretty good meter. Hard to justify the price until you spread it out over 6-9 years, eh? I'll buy it again.

2/18/25 Update:BlueLab reached out to me to resolve the issues I was having. They ended up sending me a new pH pen and shared some information on a few things worth considering. My new pen arrived and the storage cap was still moist with storage solution (this is a good thing). The new meter does work better than the original one, but I also suspect that my tap water has "low ionic content" which can cause pH readings to drift (this was also mentioned by BlueLab in their communications with me). I have found that the first readings of the day with the BlueLab pH pen can be a bit low when checking tapwater at my house. If I add nutrients to the water, the pH readings are much more definitive and easy to take. I believe this is to do with the ionic content. I experienced similar behavior with some other, cheaper pH meters. The BlueLab pen reads the calibration solutions quickly and accurately.My advice to anyone new to and/or serious about measuring pH, buy yourself some pH drops (General Hydroponics sells an affordable kit) so you can definitively measure your pH using a visual color matching method and compare to your meter readings. I found that the drops worked the same every single time without error or question or waiting and gave me more confidence in working with electronic pH meters. With some experimenting, I was able to figure out how to get repeatable and accurate readings from the BlueLab pH pen; Sometimes getting a reading of my tapwater that I am confident in takes a few tries. Why get a pen if drops work so well? The color shades when using drops are distinguishable between 6.0 and 6.5 for example, but identifying in between can be difficult to judge. The BlueLab pen gives me 0.1 resolution/accuracy that is needed when doing hydroponic gardening. Having both ways to check pH is ideal.I suspect that pH pens are generally not terribly expensive to manufacture, but it is costly to have a support team available to reach out to communicate with and help customers with their products. Ultimately, BlueLab came through with service, something that is rare these days. I appreciate this and have raised my rating to 5 stars.I really like the BlueLab pen cap, with the sponge that keeps storage solution on the bulb, and the rope used to connect it is also helpful when taking pH samples in a bucket. I do however, wish the the base of the cap was a bit wider so the pen could stand up on its own more reliably. I also wish the meter displayed down to 0.01, not because I need more accuracy, but because I want to see what the current measurement trend is doing (going up/down). The auto off timer also feels a bit short, but I suppose that is both good and bad.1/10/25 (Original Review) I really wanted to like this expensive PH meter. Sadly It came with a dry probe so I soaked it as directed for 24 hours. Calibrated it 3x with Bluelab 4 and 7 solution but readings would drift for several minutes after each calibration. Tap water would measure at 6.4 right after calibration but leaving the pen in the same sample of tap water the reading would drift up to 7.5 after several minutes. It would never read the same value twice. Just a few minutes after calibration it would read the calibration solution several tenths lower than it should. I bought this expecting accuracy, not games. Returning.

The calibration solutions come in little sachets. Easy to operate.

Save your money. I keep seeing this pen routinely recommended for some reason and decided to write a review to at least save some people some money. Stop buying this overpriced pen!!I run two hydroponics gardens and two aquascaping fish tanks both with pH sensitive shrimp species. I know a think about Water chemistry to say the least.Is pen is slow to respond at best, but totally way off at worse. Even after calibration it just can't be relied upon to give me accurate numbers. I use a cheapo pH METERs and those give me consistent and accurate results. You can buy 5 of those and get better results than this.And if bluelab wants to dispute this, I have plenty of photos (side by side readings against pens and well known water tests) to prove it.

First let me say DO NOT be discouraged from the one star reviews. I can understand someone being upset if they buy a new pen and get one that’s broken but if that’s the case none of us would ever own anything. It is absolutely impossible to buy anything that doesn’t have a bad review because of something that in many cases that has absolutely nothing to do with how the product works, go look up anything you own and love and someone had an issue, seriously go look and see, I’ve tried it there is nothing I’ve found that everyone loves. This pen is awesome if you are a grower and ph is vital and you want to be a next level grower. I’ve had mine 2 years and when it stops working I will immediately get another one. It does take a small bit of little effort to add a few drops of storage solution that you have to buy extra but that last a long time and it’s worth it to me. You add it after each use to keep it hydrated. If it dries out the pen is not ruined like some say but you might have to recalibrate which is easy after your first few times, especially with the step by step YouTube videos available to watch while you’re doing it. Just remember there are a lot of lazy incompetent people out there that all they want to do is push a button and be done with it and expect everything to be instant and do nothing else. It all comes down to how important ph means to you and it is very important to me. This pen is accurate and it’s awesome and requires very little effort to maintain and it has helped me take my growing to the next level. It also works great with my pool to, way better than those test strips they have that do work but not quite as accurate as this ph pen. Thousands of top growers use this pen and depend on it, you see them on YouTube all the time using it. I happened to run across the reviews looking for something else and wanted to see what the hater’s were saying and now that I’ve used the Bluelab pen a couple of years I felt I could give a genuine review based on my experience with it. So, now it’s up to you to decide. Good luck!

Me gusto, es fácil de calibrar.Te avisa cuando se necesita calibrar, lo único difícil es conseguir el humectador de sonda.Pero de ahí en más es un gran aparato.🤘🏼

This PH Pen is a definite must have for any growers out there. I rarely give 5 stars but this is one of the very few items worth 5 stars. I use this daily and wouldn't trade it for any other PH pen.It is expensive yes absolutely, the question is how many cheap ones you want to buy before getting this one. Don't waste your money with cheap ones. It's water proof and durable. It will last and you will be confident you are getting the desired PH. Strongly suggest this item.You want to know how tuff it is? After I decided to take a break last year I stored all my equipment in large storage bins. I was suppose to store this in the basement but I accidently stored everything in a shed outside for the whole winter and summer. When I realized what I had done I took everything out and let it get back to room temperature. My Bluelab pen had dried white solution on the probe and I was sure it was done. To my surprise after rinsing and testing my pen, not only was it working but it was still calibrated and accurate.