All contact angle meters of the OCA-series come with high-quality optics, accurate dosing and precise sample positioning. The entry-level model OCA 15EC has a camera lens with 6.5x zoom. The OCA 25 is compatible with the nanolitre dosing system, electronic direct dosing systems as well as with thermostatic devices. The OCA 50 allows to position the sample automaticaly. The expert model OCA 200 has a camera lens with 10x zoom and is compatible with a picolitre dosing system.