Cuvettes & Tubes for Samples

Cuvettes for absorbance measurements

The cuvette holder inner dimension is 12.65 mm x 12.65 mm. You can use any 10mm pathlength cuvette of choice as long as the outer dimensions are no greater than 12.5 mm x 12.5 mm.

For all of the Open Colorimeter cuvette holders, the cuvette window height measured from the base to the cuvette window center is 15 mm. Minimum fill volumes ensure that there is a sufficient volume of sample in the cuvette for accurate measurements i.e. that light will be pass through the sample being investigated. Minimum fill volume is dependent of the type of cuvette being used. Below are fill volumes for the cuvettes we ship with our instruments.

• Open Colorimeter & Multichannel Open Colorimeter: Pack of 6 x BrandTech macro and semi-micro cuvettes (3 of each).
  • Min Fill Volume = 1.5 mL
  • Min Fill Volume = 0.65 mL
• UV Open Colorimeter: Pack of 4 x BrandTech Ultramicro UV cuvettes, 15 mm center height.
  • Min Fill Volume = 0.4 mL

The cuvette holder inner dimension is 12.65 mm x 12.65 mm. You can use any 10mm pathlength cuvette of choice as long as the outer dimensions are no greater than 12.5 mm x 12.5 mm.

0.2mL tubes for fluorescence

For the Open Colorimeter Plus using a 0.2mL PCR/microfuge tube, distance from the top of the liquid to the underside of the tube lid (where it sits in the device) should not be greater than 12.5 mm. If there is not enough liquid and this measurement is greater than 12.5 mm, then there is not enough sample to cover the sensor hole. Converting this to sample volume = 50 µL minimum fill volume.

• Open Colorimeter Plus includes a pack of 6 x 0.2 mL microcentrifuge tubes.
• Min Fill Volume = 50 µL

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