The Lovibond® Petroleum Oils Comparator (AF650) is a 3-field instrument for visually determining the ASTM Oils Comparator colour of samples by direct comparison with coloured glass standards. It incorporates the 16 glass standards which make up the scale in a pair of discs.

Supplied with 2 discs containing colored glass filters traceable to ISO 17025, 3 glass sample jars, AF 763 and calibration certificate