Extendable measuring head for exact positioning and unsurpassed measure- ment stability. • GretagMacbeth ring lens system ensures accurate results. • Onboard Licensing1.1 Gretag-Macbeth AG hereby licenses you to use the demonstration D200 GretagMacbeth D19C, D196, D118 GretagMacbeth D181/182/183/184/185/186 GRETAG MACBETH D19C Densitometer with Manual - £194.95. FOR SALE! Used but in good working order. 203482053861.Dear GretagMacbeth customer,. Congratulations! You have just purchased a D19C or D190 densitometer. With its user-friendly operation, high measuring accuracy 1.2 Documentation structure This operating manual is divided into separate chapters to guide you step by step in the operation of the D190 remission GretagMacbeth KeyWizard User Manual GretagMacbeth D19C, D196, D118 Plug in the charging unit (for D196 and D19C densitometers.