NOYAFA NF9909 SP Unboxing Video
5 Testing Functions
Buying one tester, you can test 5 different values of the water coming out from the tap.
Press the Up or Down button to switch to another mode and start testing the related value.
Test the EC value of the water. Anything lower than 800 μS/cm stands for drinkable water.
Put the testing head of the product into a glass of water. The TDS value will show up on the screen soon. Don't drink anything that's higher than 500ppm.
All water contain salt (sodium chloride). For drinking water, it should be lower than 0.5‰. If the water tastes salty, test it with one easy press.
Designed to be a pen-like tester, the product is easy-carry. Simply press the Power button and dip the testing head into the water. The value will show on the screen.
The result of every test will be displayed on a high-definition screen clearly even under dark environment.
An IP65 airtight and watertight design makes the product unbreakable.