YINMIK pH Meter for Hydroponics, 4 in 1 PPM EC Meter for Plant Nutrients

I have many plants in the house and using this to check for pH of water is absolutely useful. The calibration is perfectly stable and easy to use. The quality is very good and I love the bright LCD screen for ease of reading. I'm really happy with this purchase as now I can use it to check the many different areas inside and outside of my house. I would highly recommend this.

No problems as of yet. Pretty happy with it over all. Easy to calibrate and is accurate compared to the drops. Think this is a very good product

So far I've only used it for checking pH of water for plants and a swimming pool. I check calibration before every use. The calibration is really stable. I only calibrated when I first used it and it's remained stable ever since. Calibration is pretty straightforward also. I'm really happy with it. I worked in a chemical lab for 20+ years and have worked with a lot of pH meters. This the real deal.

Happy with this. Seems reliable so far. Supplied with enough calibration solutions for several resets. Bought this to replace the Vivosun meter which was rapidly unreliable and almost ruined my crop. It also was only supplied with enough calibration for the initial setup. This product is FAR superior.

I’ve been using another meter for testing water quality that has fewer functions than this one. The functions I like are that it measures pH, EC, TDS, and temperature without needing multiple tools. The readings are quick and consistent. The display is easy to read even in low light. It’s a great tool to maintain a reservoir or DWC system.

I've purchased two of these meters, and while I still believe they are better than the cheaper ones, both of my pH meters have trouble with calibration. I followed the calibration steps VERBATIM and while the 7.0 calibration works, in the 4.0 liquid it calibrates it at 7.0. which just makes me have to start the process over. And it's only off of one calibration from the 7.0. 1 of my meters is still accurate, but once it gets out of alignment, I won't be able to calibrate it accurately Edit: updated to 5 stars because of the customer support and service from Yinmink.

What a piece of JUNK! I have been using this for 4 days and every day the PH goes way out of wack and you have to recalibrate. Well today on the fourth day I went to calibrate it and it would NOT even calibrate. So if you want to know your PH buy a different ph pen because this one is HIGHLY INNACURATE!

Great pH meter for hydroponics! I really like having pH, PPM, and EC measurements all in one device. It’s easy to use, convenient, and helps me keep my nutrient solution where it needs to be. Very happy with this purchase!

This thing is awesome! Cheap and works well and seems to be very accurate. I'm pleased with it!

Working very good

Works good I like it

Not quite as accurate as my bluelab ph meter but gives a much faster readout and includes ppm as a bonus.

very handy. all readings displayed simultaneously.