heavy metals

Extended Instrument Life: Reduces wear and tear on your pH meter

Is the Black Berkey Primer™ made in the USA

Maintenance & Care:

all without salt

Hanna HI97701-11 CAL Check Standards - Free & Total Chlorine Calibration Set chlorine powder reagents heavy metalsThe HI97701 11 Free and Total Chlorine CAL CheckTM standards provides a simple solution to calibrating and validating the HI97701 Free Chlorine Photometer that has a 0. 00 to 5. 00 mg L (ppm) range. This high quality set of standards is manufactured in our state of the art facility and comes supplied with a certificate of analysis. The certificate of analysis provides the lot number, reference values and expiration date for traceability when