Secondary pH standards (pH7.01)Phosphate pH standard[TRM-S-2005]

Catagory All TRM , Secondary pH standards


ใบรับรองของสารละลายบัฟเฟอร์ TRM-S-2001 ถึง TRM-S-2008 และ สารละลายมาตรฐานสภาพการนำไฟฟ้า TRM-S-2017 ถึง TRM-S-2019 ขอชี้แจงดังต่อไปนี้

"According to JCGM 200: 2012 International vocabulary of metrology-Basic and general concepts and associated term (VIM) 3rd edition,measurement uncertainty is defined as non-negative parameter characterizing the dispersion of the quantity values being attributed to a measurand, based on the information used.Therefore, the uncertainty of pH standard solution and electrolytic conductivity standard solution as shown in the certificate does not show the sign (+) for the expanded uncertainty"

Secondary pH standards are employed for precisely calibrating and monitoring of pH measurement instruments. Every product (secondary pH standards) is delivered with NIMT certificates showing the relevant data for every quality management system. The quality control is carried out in NIMT’ s accredited calibration laboratory using high accurate pH meter.


Must be received at the National Institute of Metrology (Thailand) only.


Range : 6.99-7.03 pH
Uncertainty : 0.006 pH

  • set(5x100 mL) (฿ 8,000.00)
  • 100 mL (฿ 1,700.00)
National Institute of Metrology (Thailand)
Contact Customer Service
Email :
Tel. +660 2577 5100 Fax. +660 2577 3659
3/4-5 Moo 3 Tambol Klonghar Amphur Klong Luang Pathum Thani 12120 Thailand
Powered By : Information Technology (NIMT)