The OCA 15 is the entry level measuring device for professional and . This device has automatic dosing system which let to obtain precisse and repetative measurements. Measuring range is 0-180° / ±0.1°. Moreover, this device let to conduct measurements using 5 different techniques. Due to possibility of free syringe/ liquid changing surface energy can be measured. Softwere let to calculate surface energy with accuracy ca. 0.01 - 2000 mN/m /± 0.01 mN/m, using various matematical models.