TDS Meter Digital Water Tester, Accurate and Reliable, Professional TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, RO/DI System, Aquariums

Needed to test my water here in Florida and this device is so easy to use. I have a filtration system at one of my sinks which I wasn't sure was still operating at optimum level. I did a test of that system compared to my regular sink and results were incredible. It confirmed that my filtration system was still doing its job and that the water at the sink was not suitable for drinking. The device is easy to use and quick. Inexpensive and works great.

Great product. Durable and accurate. One of the most highly used gadget in the kitchen to check the water quality. This is the second one we own in our household. Highly recommended.

Worked great till I left it out in the rain

I’m growing chili peppers hydroponically. I need to test my TDS to ensure the proper nutrient concentration in the water. This tool measures the TDS, EC, and temperature (both C and F). It appears to be accurate as far as I can tell. I tested our tap water and the screen turned red and showed the PPM over 600 (?!?). Then I tested our filtered water from the fridge which has a cheap filter and it was still red and over 600 ppm. Next it tested bottled water from the dispenser and it was around 300. Finally, I tested some distilled water and it read 0. The controls are easy: on/off/hold (which only holds the PPM/EC, not the temp), clear, and mode (to switch between PPM, EC, Temo C, and Temp F). The meter appears to be fairly consistent. I don’t have a good way to test the accuracy other than filtered water, but it’s certainly trustworthy enough for my purposes. The instructions claim that the TDS calculation compensates for temperature, and I believe that since it reads temperature. I do wish there was a way to get the raw EC value because the conversion factor has a large dependence on the type of solids suspended in the water. From what I’ve read, you need to be careful not to submerge too much of the meter so that water won’t come into contact with the internal electronics. I haven’t tested this, but keep the water between the min/max levels and be careful not to drop into the water.

Highly accurate. I tested bottled filtered water, tap water, brita filtered water and it gave me the exact results every time

The first image is the TDS reading from one of my shrimp tanks. The idea that my TDS is 531 ppm is absolute absurdity. At that range my shrimp should be failing to molt and dying. I have multiple colonies of cherry red shrimp, blue dream shrimp, amano shrimp, and a single bamboo shrimp. I have not lost a single shrimp, especially not to a failed molt. It's far more likely the TDS is at about 231 or 331, a range livable by the shrimp. The second image is me reading RODI water straight from the system. It reads at about a 3 but after the water cools and settles it'll read a 0. It really seems like the accuracy only works when you are trying to read if you RODI system is working or not. Otherwise checking your tanks TDS is utterly useless with this device. Sure its easy to use and read, but I guess with this thing being so cheap you get what you pay for in terms of accuracy. Only purchase if you intend to use it to read straight RODI water, otherwise, skip this item.

I purchased this because I was having an issue with hard water. I also got a few hard water strip tests. I compared the result between my house, my folks house and my sisters house. We all live in the same city, but some houses have water softeners, and one house has water filtration systems, so one would think the readings would be different. House 1 with just a water softener had the lowest contamination. House 2 with a softener and a filter had the highest hard water and contamination. House 3 with just a filtration system had the hardest water- so that made sense. It also was very different from the paper water hardness test stripes that I got. I couldn't validate anything, so its hard for me to trust the results. The reader itself was easy to manage. You put the tip in a cup of water, and the results can be compared to the numbers on the back of the reader. You can toggle between hardness and contamination results.

Nothing to compare against but satisfied with product and self-consistency across measurements.