Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket Tester kit, Accuracy: ±1% F.S, 2-Point Auto. CalibrationClimeCo Certified

Very satisfied with the TDS20. Very easy to calibrate and use.

Same as the PH meter but the TDS version. Excellent Metter, brand is not to be bothered because apera is definitely up there in quality for the price compared to the blue guys meter. Easy to use, easy to calibrate and easy to store with distilled water. Only had it for 2 months but so far it's on point and have not had to calibrate it since I got it.

I ordered this TDS Pocket Tester because I was so impressed with the Apera PH meter.They seems to be high quality and built with lasting materials. It not your ordinary cheap light weight plastic PH meter. It is a little pricey, but this one will last! You will also get awesome Accuracy: ±1% F.S.Calibration is easy and exactly the same as you would do for the PH meter. In fact, both PH and TDS calibration is on the same page, same buttons and all. This make it very easy to remember how to calibrate without different manuals.I really like / appreciate the case, calibration and 2 calibration solutions are stored in a really nice strong case. Keeping everything together and ready to use is Key!!I have just started using the TDS meter and getting use to liquid nutrients. This is the reason I purchased the meter. From what I see so far it it a great TDS meter.I have nothing to compare to but just the impressive quality tells me I should be good with with one!

Amazing product. Easy to use.

I regret buying this. I got a cheap meter that's way better. Its faster on the display and on the readings. I used the calibration solution from this kit on the cheap one and it was having a better time reading it then the apera meter. This is simple technology just get a cheap one.

Well designed for a $60 instrument. Instructions seriously lacking with regard to clarity. Turn it on by quickly pressing top button. Quickly...... I also have the pH version and it is equally well designed.

This tds meter is very easy to calibrate and use. The instructions are extremely comprehensive, straightforward, and clear. I highly recommend this device and company.

I struggled with this TDS meter because the numbers it gave me were way off from my other, cheaper TDS meters. It made no sense, and I thought it was broken. Then I read a review where the TDS meter conversion needed to be adjusted. The TDS20 meter comes with 1EC=700ppm as the default. To change it to USA standard, change the factor on the meter from .71 to .50!!!! Once I made the change, the readings were in line with my other TDS meters, within 3 or 4 points!