Tube Holder

A pneumatic tube holder that mounts directly on the fixture plate and grips a wide range of tube and cap diameters. Holds the tube steady so the Dorna TA arm is free to run capping and decapping, dispensing, contamination-avoidance moves, or any other operation on the tube.

The fingers are configurable in length, diameter, and spacing — the same holder accommodates microcentrifuge tubes through 50 mL conicals without swapping modules. Pneumatic actuation gives a firm, sample-safe grip; release pressure when the tube needs to move on.