Portable TDS meter,digital TDS meters:

Features:
1) Range: 0 - 9990ppm (mg/L)
2) Resolution: 1ppm (also available in 10ppm)
3) Accuracy: ±2%
4) Power source: 2 x 1.5V button cell batteries (included)
5) Battery life: over 1000 hours of continuous use
6) Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1")
7) Weight with case: 76.5g (2.7oz.)
8) Weight without case: 56.7g (2oz.)
9) Ideal for commercial use. includes carrying case with belt clip
10) Highly efficient and accurate due to its advanced microprocessor technology
11) Hold function: saves measurements for convenient reading and recording
12) Auto-off function: the meter shuts off automatically after 10 minutes of non-use
13) to conserve batteries
14) Measurement range: 0-9990 ppm. From 0-999 ppm, the resolution is in
increments of ppm. From 1000 to 9990 ppm, the resolution is in increments of
10ppm, indicated by a blinking 'x10' image
15) Display: large and easy-to-read LCD screen
16) Factory calibrated: recalibration is not necessary, but can be done easily with a
watch screwdriver. There's no need for messy solutions
17) Reads in increments only of 10ppm (0-9,990ppm)