The accuracy is within 0.01 pH, which is about as good as you can get from a non-medical device. It's not just about some plants preferring acidic soil or others prefer more alkaline plants — it also determines the nutrients available to your plants. You'll also get Bluelab's superior customer support if your meter develops technical issues and if you have any questions. It's more aimed at serious growers who want more accurate results and more features than the Active Air testers mentioned above.
Keep the storage bottle away from high heat and high humidity areas.
What is the most accurate type of pH meter?
According to Bluelab, they thoroughly test every pen meter before it leaves their premises to ensure that the meter is highly accurate. The battery lasts about 2000 hours, which is much more than the other pH meters you'll come across. Most pH meters come with replaceable probes so you can replace them if the probe gets damaged. For regular analysis, a pH meter is a worthwhile investment in dealing with inefficient and costly single-use tests.
For such cases, there are pH meters without a glass probe that you could buy, although they can put a heavy burden on your pocket.
Are cheap pH meters accurate?
Even though most instructions are lengthy, when you receive a new pH meter, you should first read the appropriate manual that comes with it. If you've invested time and money in your hydroponic system, don't waste it by buying a cheap pH meter. The best digital pH meters are more expensive than manual pH meters and also require more maintenance than manual meters. The cheap ones that have manual calibration are pretty crap and will go out of calibration pretty quickly.
Comparing one pH tester to another, or judging test results based on previous experience or your expected results, is scientifically wrong and can be misleading.
How accurate are electronic pH meters?
Remember that a pH change of 1.0 is actually a 10 change in acidity, so you can over-treat or undertreat your soil if you don't start with an accurate pH. After purchasing your pH tester, the only way to determine whether it is accurate is to use calibration buffer solutions to perform a pH calibration. If you are looking for an accurate soil pH meter that is easy to use, the electronic meter is ideal. This is because for most digital pH meters, the pH accuracy is plus or minus 0.2 pH, which can actually be a problem.
It looks a bit like a metal stick, and it is inserted directly into the ground to give you a quick and accurate reading.
What makes a good pH meter?