This Standard validates the calibration of the HI 713 Phosphate Checker HC Colorimeter.
(2)Standards (1) 0.00 and (1) 1.00 ppm phosphate
Liquid Reagents for Alkalinity Checker HC Liquid Reagents for 25 Alkalinity Tests
You guys are terrific. Over a dozen orders in the last few years, and every one has been handled quickly, professionally, and with courtesy. Thanks.