or RO water (will damage probe sensitivity)

Slower water production rate

✅ Clean water anywhere: 75% of water is consumed away from home—stay hydrated safely

Temperature Range: 0 to 50°C (32 to 122°F)

PPM 500 (TDS)

Hanna Free and Total Chlorine CAL Check Standards - HI93414-11 858502005111 or RO water (will damageThe HI93414 11 Free and Total Chlorine CAL Check Standards provide a simple solution to calibrating and validating compatible benchtop and portable photometers. 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 certifying compatible free and total chlorine