น้ำยามาตรฐาน น้ำยาปรับตั้งค่า > น้ำยามาตรฐาน TDS and EC Calibration Solutions C1000 For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.
น้ำยามาตรฐาน น้ำยาปรับตั้งค่า > น้ำยามาตรฐาน TDS and EC Calibration Solutions C342 For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.
pH Buffer Solution Variety Pack PH-BUF HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life.
PH103 / Extech Tripak Buffer Pouches (4, 7 and 10pH plus rinse solution) Convenient, pre-measured pH calibration solutions for your meter. Rinsing solution used for cleaning off the pH electrode before and after taking ...