4 in 1 TDS Meter Digital Water Tester – Accurate and Reliable EC & White
Perfect for use as a water tester for drinking water. 【MULTIPURPOSE TDS TESTER】Test the purity of drinking water to ensure it’s healthy, monitor if Reverse Osmosis (RO)/DI System works properly, whether filter need replaced, maintenance aquarium, hydroponics(test nutrients), pool and spa, etc.