KONVIO NEER5 in 1 TDS Meter PH Tester, 0.01 High Accuracy Digital PH Meter for Water, PH/TDS/EC/Salt/Temp Tester, PPM Meter Water Tester for Drinking Water, Hydroponics, Plants, Aquarium and Pool

I love everything about this product with the exception of one thing I’m getting a little old for reading the very small directions. If you could show me where I could get these directions a little bigger I wouldn’t have to use this big spyglass other than that. It’s great great I’ve tested every bit of water that I can get my hands on and I can assure you this thing is fast and accurate and with the extra calibrations materials they put in the bag, you will be able to use this thing for many years. The batteries are great. They’re easy to obtain and the thing does everything you want it is reliable and the best value for money you can buy. I can’t say enough about this product I’ve had other and other water detectors and they don’t hold the light to this in my backyard. I have a 20 x 40‘ inground pool , is it item of Must have.

Will not stay calibrated. The readings fluctuate wildly. I read and followed the directions carefully. I calibrated. And calibrated. Repeated again (up to 6 times). I started with 2 pt, then 3 pt. The meter at first wouldn’t read the same solution even close. I factory reset. Re calibrated… same problem each time. Same solution might read several very different readings. Going back to paper.

The ph is easy to do and calibrate but the other 2 is hard to figure out.

This is a great multi-purpose meter..Works well - quickly - and without drama..My only comment is that I should have more careful when I purchased a salt measuring meter...This unit does that too!Good purchase

Seemed fine, bang on with my other meter. But about the 5th time using it, it now doesn't read ph. Just says ph 0.Maybe mines just defective, who knows

It worked for about a month with no problems. It won't calibrate or read ph correctly.

Easy read accurate for the price

there is a pure cell compartment, bwtteries getting loose. a little touch, or even knock on the surface turns it on/off randomly