Digital TDS3 Digital Pen

FEATURES

Ideal for commercial use. Includes a carrying case with belt clip.
Highly efficient and accurate due to its advanced microprocessor technology.  Hold Function: saves measurements for convenient reading and recording. bullet Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries.
Measurement Range: 0-9990ppm. From 0-999ppm, the resolution is in increments of 1ppm. From 1,000 to 9,990ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image. 
Display: large and easy-to-read LCD screen.
Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
Also available in "x10" mode: reads in increments only of 10ppm (0-9990ppm).

Range: 0 - 9990ppm (mg/L)
Battery life: over 1,000 hours of continuous use
Accuracy: +/- 2%
Power source: 2 x 1.5V button cell batteries (included)
Dimensions: 15.5 x 3.1 x 2.3cm