22% drop
Zerone TDS Meter Tester Water Quality Testing Pen Purity Filter TDS Meter Tester 0-9990 PPM 3 Colors
$7.83$10.09(-22%)
- The TDS meter tester can be used in: water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools and spas, aquariums, hydroponics etc.Hold function: Saves measurements for
Set alert threshold:
10%