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Densitometers

Product catalog summary

Overview: The document provides detailed specifications and features of two densitometer models, DEN-1 and DEN-1B, designed for measuring the turbidity of cell suspensions in life-science applications. These devices are compact, efficient, and factory calibrated for specific measurement ranges.

Specifications:

Measurement Range: DEN-1 measures from 0.5 to 4.0 McFarland units, while DEN-1B measures from 0.00 to >7.5 McFarland units. Both can extend up to 15.00 McFarland units with increased standard deviation.
Precision: ±3% with a standard deviation of ±0.1 McF at 3.00 McF units.
Measurement Time: 1 second.
Light Source: LED with a wavelength of 565 ± 15 nm.
Tube Compatibility: Designed for 18 mm tubes, with an optional adaptor for 16 mm tubes.
Power Supply: DEN-1B can be powered by 3 x AA batteries or an external 12V power supply.
Display: DEN-1 uses an LED display with 0.1 McF resolution, while DEN-1B uses an LCD display with 0.01 McF resolution.
Dimensions and Weight: Both models have dimensions of 75 mm (h) x 115 mm (d) x 165 mm (w) and weigh 0.7 kg.

Features:

Both models are factory calibrated and can retain calibration without a power supply. User calibration is possible with commercial standards or laboratory-prepared cell suspensions.
Compact design suitable for small workspaces.
Applications include determining cell concentration in fermentation, testing microorganism susceptibility to antibiotics, and measuring optical density.

Accessories:

DEN MCF STDS: Set of liquid McFarland standards in 16 mm glass tubes.
DEN MCF 18 STDS: Set of gel McFarland standards in 18 mm glass tubes.
D16 Spare Tube Adaptor: For 16 mm outer diameter tubes, included as standard.

Additional Information: The document notes that 1 McF unit is approximately equal to 3 x 10⁸ CFU/ml. Both models come with a 2-year warranty.

Catalog excerpts

Densitometers DEN-1 for 0.5 - 4.0 McFarland units DEN-1B for 0.00 - >7.5 McFarland units, battery powered

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Densitometers DEN-1 and DEN-1B Compact and efficient benchtop densitometers for measuring turbidity of cell suspensions in a variety of life-science applications. The densitometers are designed and factory calibrated to measure turbidity in the range of 0.5 to 4.0 McFarland units (DEN-1) 0.00 to >7.5 McFarland units (DEN-1B) with a small standard deviation. If required, they can deliver a wider measurement range (up to 15.00 McFarland units), but with a greater standard deviation. n Measurement range: 0.5 to 4.0 McFarland units (DEN-1), 0.00 to >7.5 McFarland units (DEN-1B) Measurement time:...

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Densitometers – specification Densitometers Light source Wavelength RangeMcFarland units Measurement time Tube diameter, external diameter Sample volume Display / display resoluton External power supply Independant power supply Ambient temperature range Power supply Accessories DEN MCF STDS set of liquid McFarland standards in 16mm ø glass tubes. 0.5 / 1.0 / 2.0 / 3.0 / 4.0 can be decanted into an alternative tube (shelf-life no longer valid). Requires D16 adaptor, supplied with DEN-1 / DEN-1B. DEN MCF 18 STDS set of gel McFarland standards in 18mm ø glass tubes. 0.0 / 0.5 / 3.0 / 6.0 / >7.5....

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