Densitometers are designed to measure cell suspension turbidity in the following range: 0.3-5.0 McFarland units (0 - 180 × 107 cells/ml).
They allow the measurement of solution turbidity in a wide range (up to 15.0 Mcfarland units).
However, it should be noted that the standard deviation values increase in the process.
The principle of operation is based on the measurement of optical density with digital representation of the results in McFarland units.
|0.00 – 15.00 McF|
Part Number: 103.3500
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 0.0–6.0 McFarland unit range.
We recommend to use Biosan standards to ensure full reliability.
It is acceptable to use other commercial as well as self prepared standards (e.g. BaSO4). Possibility to restore factory calibration settings.
Following calibration kits are available:
Glass Sample Tubes
Without lid (16х100x0.8mm), 78 pcs. Fits DEN-1, DEN-1B factory calibrated
For glass tubes with diameter 16 mm, set of 0.5; 1.0; 2.0; 3.0; 4.0 McFarland Turbidity Standards (latex particles).
McFarland turbidity standards, Ø18mm
|Measurement range||0.00 – 15.00 McF|
Measurement wavelength (λ)
λ = 565 ±15 nm
Accuracy (0.3 - 5.0 McF)
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
Overall dimensions (W×D×H)
165 × 115 × 75 mm
Input current/power consumption
12 V, 7 mA / 0.1 W
External power supply
Input AC 100-240 V, 50/60 Hz;
External power supply
Yes. Glass and transparent plastic tubes (12 (only on DEN-1B), 16 or 18 mm in external diameter) can be used for work with DEN densitometers. A-12 (optional), A-16 adapter (included) must be used for work with tubes which are 12mm, 16 mm in external diameter.
Note! The unit must be calibrated every time a tube type (e.g. with different ext. diameter, bottom shape or different material) is changed.
Yes. Both commercial standards and standards prepared in the laboratory can be used for calibration.
From December 2015 factory calibration is for work with glass tubes with an external dimeter of 16 mm.
Calibration procedure is described in the user manual p.3.4. See user manual.
Procedure of restoration of factory calibration settings is described in the user manual p 3.5. See user manual.
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