drinking water hardness test kit

drinking water hardness test kit made in China   Visual Reading Steps Step 1  Remove a test strip, taking care not to touch the reaction fields. Step 2  Immediately close the container again. Step 3  Dip the test strip for about 1-2 second into the fresh water specimen. Step 4  Read the result by comparing the  color scale  after  40 seconds. Package information 100 barrels/ carton (100 strips/ barrel) 50*24*26 cm, 7 kg…

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