This range of relative density standards are certified in accordance with primary level ASTM D1480 methodology, and are dual-certified to ISO 17025 / ISO 17034 under UKAS accreditation. Relative Density standards are designed for the calibration or verification of instruments used to measure density and relative density of materials at the desired test temperature within the range of 15 to 25 °C.

• Certified in accordance with primary level ASTM D1480 methodology
• Full traceability to national standards
• Supplied in tamper-evident packaging with a 2 year shelf life

Relative density is calculated by dividing the density, as obtained from ASTM D1480, by the density of water at the reference temperature.

The density of water was taken from the table 'Density of Water' found in ASTM D1480 and confirms to the International Temperature Scale (ITS 90).