Your favorite colorado grower
July 29, 2019
I have been using bluelab products for over eight years. Highly accurate but priced a bit steep for many ordinary gardeners - If you are looking for lab quality and extreme accuracy look no further. All blue lab products that I have tested which include their combo meter, soil ph pen, and the guardian meter have all performed excellent. The ph probes must be kept clean and submerged in a solution (I use tap water that is frequently changed out after each use). To keep the probes lasting you must keep proper maintenance and always be sure to recalibrate one to two times a month for best results. Calibrate in ph 7.0 solution first and follow it up with 4.0 until your ph probe has a check mark in which it should now be perfectly calibrated and accurate. Be careful not to drop your ph probe as they can be fragile that most likely would resulting in accurate readings or cracked glass.
June 26, 2021
They send many of them void of the required storage solution. Either it leaks out during storage at warehouse or when shipped. In any case they are not suppose to be stored dry so when you open the box and see a dry probe you have to get it replaced. Once you get one that is properly packaged with solution they work great. I have had a pen last almost 3 year with proper care. Then took 3 tries to get one that was packaged properly. Although they did replace them until I got a properly package one. Just annoying cause you can't buy an extra and keep it the box sealed in case you break one cause you have to make sure they didn't send you a dry probe.
May 20, 2021
The one I ordered was delivered in perfect condition, and works well. It came with plenty of storage solution. The response time is good enough for a hobbyist to perform alkalinity titrations by pH, but not as good as the $500 probes in the lab I work at. Which is to say pretty good, but not instant. (The $500 probe isn't instant either.) I'll update in a year or when it dies to report on lifespan.
August 14, 2017
Delivery was fast. Product works as advertised, but it is exceptionally delicate. Not sure if it is possible but it would be nice to have its made a bit more durable. You need to ensure you take it out of the reservoir before stirring after putting the PH adjustment product in. I made a case for it out of bubble wrap because the last one I had stopped working after 6 months.
September 24, 2014
This probe is extremely fragile, albeit it works excellently and is reliably accurate. It is very fast at measuring pH and the storage tip does seal properly to protect the elements. This is a replacement for me, and my biggest suggestion is to buy a small Pelican case to store this in. I bought the Pelican 1120 and it fits, but i would go slightly bigger.
February 25, 2017
My Bluelab combo meter is used daily and is still running strong, I had to replace the probe as it was not giving a 4/7 at recalculating, .2/3 high so ordered a new one. First probe was accurate for about 4 years. Also ordered new solution, ph 4 and seven, back in the game, can't live without this team.
September 26, 2015
High quality with good accuracy. I bought mine on a tuesday, had it by friday. Probe was in perfect condition, had plenty of storage solution in the cap and after doing a 3 point calibration it works perfectly. I expect this probe to last many years so long as i don't break it by accident.
August 19, 2021
The price-point and quality on these pH probes is good. I use these for students who tend to break everything. Rather than risk my fancy $2000 pH meter, I bought bluelab meter for general lab use. This pH probe purchase was to replace one that a student killed =(
Kevin J Morse
January 24, 2023
Boxes were Undamaged, one box previously opened. The fluid required to keep the tips dry have leaked out. One probe was dry, the other had enough in it to keep it damp. I have not been able to get to them to try to ensure they work yet as I am away from home.
November 21, 2018
Be real nice if they included packets of the 2 ph calibration solutions. Useless without being able to calibrate it. Probe arrived and now I have to wait for an order of the solution to make sure it's calibrated accurately before I can use it
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