Biosan SIA

Densitometer (suspension turbidity detector)

For measurement of cell suspension's turbidity in the range of 0.3–5.0 McFarland units (100×106 – 150×107 cells/ml). A densitometer is used for measurement of cell concentration (bacterial, yeast cells) during fermentation process, determination of microorganism sensitivity to antibiotics, microorganism identification using various test-systems, for measurement of absorption at the definite wavelength, as well as for quantitative estimation of concentration of colour solution, absorbing green light.

The unit is calibrated at the factory (for operation with 16 mm diameter glass tubes) and keeps calibration without power supply.
The operation principle is based on measurement of optical density with digital presentation of results in McFarland units

Two versions of the product are available:
DEN-1 powered from external energy supply;
DEN-1B powered both from external energy supply and from batteries (АА). Besides, DEN-1B operates with higher precision of measurements (up to 0,01 McF).

Certified reference material, neutral density glass filter set of 4 Abs calibration points - 0.3532, 1,0512, 2,0425, 2,927 (the values may vary slightly from batch to batch)