DURACAL buffers are guaranteed to be stable for 5 years from the date of production.

Conventional pH buffers change their pH value due to air diffusion during storage and use. Duracal buffers do not change their pH value during storage or use. The unique dosing bottle allows sensor calibration in the bottle without reservoir contamination.

The addition of buffer preservatives prevents contamination by bacteria and fungi while retaining high buffer capacity for fast stable calibrations.

• Certified traceable to N.I.S.T.
• Easy-to-use CALPACK™ dosing bottle allows sensor calibration
• Economical since only the quantity required for calibration is dispensed from the CALPACK bottle
• Guaranteed 5 year pH buffer lifetime
• For automatic buffer recognition:
  simply use IEC 746/Technical Buffer

• Convenient 250 ml and 500 ml plastic bottles with built-in calibration compartment
• Economical, since only about 20 ml’s of buffer is used per calibration
• Actual value is determined by a DKD laboratory, accredited for pH measurement
• First class certificate with traceability to international standards
• Certificates are available at www.hamiltoncompany.com/cert
• Expiration date on the bottle
• Immune to micro-organisms