HM Digital TDS-3 Handheld TDS meter

A pocket TDS meter for checking nutrient strength and source water. It reads from 0 to 9990 ppm: in 1 ppm steps up to 999 ppm, then in 10 ppm steps (shown by a blinking indicator) above 1000.

It comes with a carrying case that clips to your belt.

Pairs with: HM Digital 1000 ppm TDS Calibration Solution, 3 oz.