Our multi-dosing units DS4222/DS4224 equip the DSA30 for the fully automatic dosing of 2 to 4 liquids. The motorized lift automatically actuates the dosing height or places the drop carefully on the sample. The software organizes even highly complex dosing and measuring sequences and, when combined with motorized axes, enables solids to be analyzed fully automatically. For example, the surface free energy of a solid can be determined based on contact angles with several liquids in a single measuring sequence. The uniform dosing feed has a large dynamic range (10 to 1400 µL/min with a volume resolution of 0.1 µL). It can be set to a very slow speed in order to accurately measure the advancing angle and the receding angle. On the other hand, service functions, such as filling a syringe, are carried out very quickly.
An additional manual syringe can be used for other substances, for example for measuring surface tension or analyzing contaminating liquids.
In addition to the dosing unit, the following components are also included in the scope of supply:
- The required number of precision glass syringes SY22
- Storage containers for the appropriate number of liquids
- Additional manual single-dosing for disposable syringes
- 10 disposable syringes (3 mL) with Luer-Lock connector
- 6 Sets of 5 needles each with different combinations of material and diameter for measuring contact angle or surface tension. The needles are made of steel, PP or PTFE for differently wetting liquids.