Digital TDS Testing Pen
$14.99
Designed to measure total dissolved solids (TDS) in water. Great for the home aquarist.
Allows easy and accuate testing of R/O water to ensure that membranes are fuctioning properly.
Data Read Function; Auto-off Function;Measures from 0 to 999 ppm, with a resolution
of 1ppm. A flashing reading indicates over 999 ppm.;Auto Temperature Compensatrion; Temperature range: 32F - 100F; Accuracy:
+/- 3%; Batteries: 2x1.5v (included) ;Factory calibrated
