This line of buffers with millesimal accuracy (±0.002 pH), HI 60xx, has been prepared to meet the increasing need for assured accuracy in pH measurements. Each bottle of the series HI 60xx is provided with a certificate of analysis, prepared by comparison with NIST standards.
The colors on the HI 60xx series packaging correspond to a given standard pH value. They make it easy and safe to identify the buffers to be used.
HI70032P - 1382 mg/l (ppm) TDS@25°C - 25x20ml
HI70010P - 10.01 pH@25°C - SQ - 25x20ml
HI5521 Research Grade pH/ORP and EC/TDS/Salinity/Resistivity Meter with CAL Check™
HI70031C - EC 1413 µS/cm@25°C Zert. - 25x20ml
เครื่องวัดค่าเหล็ก รุ่น HI721 



