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DEN-1, Densitometer (suspension turbidity detector)

DEN-1, Densitometer (suspension turbidity detector)
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Description
Densitometer is designed for measurement of cell suspension's turbidity in the range of 0.3–5.0 McFarland units (100×106 – 150×107 cells/ml).
Densitometer provides the opportunity to measure solution turbidity in a wider range (up to 15.0 McFarland units) however, it is necessary to remember that in this case the standard deviation values increase.
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 operation principle is based on measurement of optical density with digital presentation of  results in McFarland units. The unit is calibrated at the factory (for operation with 16 mm diameter glass tubes) and keeps calibration without power supply. However, if necessary it is possible to calibrate the unit by 2–6 points in 0.5–5.0 McFarland unit range. Both commercial standards (e.g. produced by BioMerieux, Lachema, etc.) and the cell suspensions prepared in a laboratory can be used for calibration. Possibility to restore factory calibration settings*
 
Following calibration kits are available on request:
CKG16-4 for glass tubes with diameter 16 mm  (polymer microparticles), set of 0.0; 0.5; 1.0; 2.0; 3.0; 4.0 McFarland Turbidity Standards;
CKG16-6 for glass tubes with diameter 16 mm  (polymer microparticles), set of 0.0; 0.5; 1.0; 2.0; 3.0; 4.0; 5.0; 6.0 McFarland Turbidity Standards. For DEN-1 calibration is only possible till 5.0 McF.
CKG18-4 for glass tubes with diameter 18 mm  (polymer microparticles), set of 0.0; 0.5; 1.0; 2.0; 3.0; 4.0 McFarland Turbidity Standards;
CKG18-6 for glass tubes with diameter 18 mm  (polymer microparticles), set of 0.0; 0.5; 1.0; 2.0; 3.0; 4.0; 5.0; 6.0 McFarland Turbidity Standards. For DEN-1 calibration is only possible till 5.0 McF.
 
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).
 
Specification
Light source LED
Measurement wavelength (λ) λ = 565 ±15 nm
Measurement range 0.3–15.0 McF
Display resolution 0.1 McF
Accuracy (0.3–5.0 McF) ±3%
Measurement time 1 s
Sample volume not less than 2 ml
Tube external diameter 16 mm (using A-16 adapter) or 18 mm (without adapter)
Possibility to restore factory calibration settings +
Display LED
Overall dimensions (W×D×H) 165 × 115 × 75 mm
Weight 0.7 kg
Input current/power consumption 12 V, 80 mA / 1 W
External power supply Input AC 100–240 V, 50/60 Hz; Output DC 12 V
Standard set External power supply, A-16
 
Optional accessories
BS-050102-MK CKG16-4 - ø16mm - 0; 0.5; 1.0; 2.0; 3.0; 4.0 McF
BS-050102-OK CKG16-6 - ø16mm - 0; 0.5; 1.0; 2.0; 3.0; 4.0; 5.0; 6.0 McF
BS-050102-NK CKG18-4 - ø18mm - 0; 0.5; 1.0; 2.0; 3.0; 4.0 McF
BS-050102-PK CKG18-6 - ø18mm - 0; 0.5; 1.0; 2.0; 3.0; 4.0; 5.0; 6.0 McF
BS-050102-LK Glass sample tubes without lid (16х100x0.8mm), 78 pcs. Fits DEN-1, DEN-1B factory calibrated.
BS-050102-DK IQ OQ document
BS-050102-EK PQ document
 
Replacement parts
BS-050102-AK A-16, adapter for 16 mm tubes
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