HI93735-01 Hardness Total (200 to 500 mg/L) – Reagents -100 Tests

The HI 764 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the HI 764 Checker®HC, press the button and read the results. It’s that easy.

Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb