Conductivity standards, Sodium chloride
: Hach
Sodium chloride standard solutions according to OIML, traceable to NIST and Standard solution verified by Reference Materials Laboratory.
Shelf life: 0,05% NaCl with 24 months from date of manufacture; 25,0 µS/cm NaCl with 12 months from production date;
Observed shelf life after opening, following recommended storage and use: 3 months.
: Each standard is delivered in an airtight can and is supplied with a film-wrapped 'Certificate of Conformity and Traceability' as well as a DAkkS calibration certificate specifying the exact measured value and calculated expanded uncertainty (k=2) for each batch of conductivity solution.