TDS Meter, Water Quality Tester, Accurate and Reliable, Hydroponic Nutrient Meter, Household Drinking Water, Pool, Aquarium Water, Comes with Carrying case, 0-9999ppm.

testing R.O. output

Standard TDS meter sold by many. The imitation leather case is a nice effort to be classy. OK, so it works fine and if like the others....should last several years. Dun let the probe dry out too long.

I think you need some test strips as well as this so that you know what's actually in the water. This is just a tester that measures ppm, you'd never know what is actually in the water without test strips

This meter works. What more can I say? I calibrated it out of the box, and have been using it for about 3 months without the need to recalibrate. I find this meter to be extremely accurate and useful. You will get value for your dollar with this pH meter.I would recommend this product.UPDATE: after 2 ½ - 3 years of use, I had to recalibrate the meter. I used the last of two calibration powders they provided (used the first upon initial use). Worked perfectly and the meter is once again accurate. You can tell it’s going wonky when the meter keeps changing levels while in the water. I need another as a back up but they have not been available. I would DEFINITELY but this again!

We are experimenting with a small hydroponics kit and needed to be able to measure the quantity of nutrients in the water. This meter works well and gives a quick readout of the electrical conductivity (EC) of the water. The display is quite small so you might need a magnifying glass to see some of the details on the LCD display, but I don't consider that to be a problem (will depend on your age and eyesight!). I don't know how long the battery will last, but for my use probably a long time since measurement takes only a few seconds and is done infrequently. Note that if your use case requires that you measure a total dissolved solids (TDS) value, you just need to multiply EC by 500 (easy to do "in your head" if you multiply by 1000 and then divide by 2).

I'd like to give this five stars, however, I'm not sure what's going on. I tested it on tap water and then filtered tapwater & there does seem to be a slight difference. The numbers change also, with how long you leave it in the water, of which I don't understand. So because I don't understand everything about this I cannot put any blame on this product necessarily. I do wish it was backlit.

Received today, Will not turn on. Contacted seller. Will update once they respond. 1 Star.Update 1: Seller got back to me within 2 hours, got a new one out to me the same day I received the defective product.Update 2: Received new, working item today. Only took them 2 days to get me a working one. Very responsive and helpful seller. New product is working well. Would recommend.

I was not intending to buy this meter but then my grandson showed me how I could apply it to my hydroponic system and I simply wanted a pH meter but I'm not going to send this back I can definitely use it it has worked well for what he showed me to do with it and it has become part of my feeding time thank you