44% drop
TDS Meter, Electronic Water Tester with 0-9990 PPM Measurement Range,Digital Water Test Pen for Farming, Aquariums,Pools
$6.50$11.58(-44%)
- Quick and Accurate Readings, - Just turn it on, immerse in about 1 inch of water and read the display, the digital display makes it easy to read.
Automatic calibration, no need for any adjustment
Set alert threshold:
10%