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Micro-tubes

Plastic tubes

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Presentation

Quality features

Lid membrane of consistently uniform thickness to ensure trouble-free piercing by the analyser.

Wall thickness without undue variations.

Lid provides leak-free seal and fits tight, yet is easily re-opened.

Very good translucence.

Free from flashes, air bubbles, streaks, etc.

CE-marked acc. to IVD-directive 98/79 EC

Relative centrifugal force (RCF)

The quoted permissible RCF values (identical to g values) refer to filling with water and 20 min centrifugation time at 20°C. However, the actual stress limit is affected to a large extent by conditions such as the positioning in the rotor, chemicals, temperature and running time. There- fore, the RCF values must only be understood as a general guide. (DIN 58970).

Equation to calculate RCF:
RCF = 1,118 x r x (n/1000)2

Example:
Rotation radius r = 180 mm
(vertical distance between center of rotation axis and bottom end of centrifuge tube)
Speed n = 6000 min-1 (rotations per minute divided by 1000)

RCF = 1,118 x 180 x (6000/1000)2
= 7245