The small densitometer is the ideal additional instrument in the research and routine laboratory for cell density and turbidity measurements. The concentration determinations of bacterial and yeast suspensions as well as measurements of coloured solutions absorbing green light are based on the measurement of the optical density at a fixed wavelength of 565 nm. These values are represented in digital form as Mc Farland units. The unit is pre-calibrated, but can also be calibrated using common standards (available on request).
Standard deviations:
0,5 McF = 0,5 ± 0,1
3,0 McF = 3,0 ± 0,1
6,0 McF = 6,0 ± 0,2
7,5 McF = 7,5 ± 0,2
• Determination of cell densities from 0.3 - 5.0 McFarland units (100 x 106 to 150 x 107 cells / ml)
• Extended determination from 5.0 to 15.0 McFarland units with larger standard deviation
• Determination of the optical density at 565 nm (± 15 nm) by light emitting diode
• Accuracy: ± 3%
• Measurement duration: 1 second
• Sample volume: 2 ml
• Measurement in 18 mm tube (16 mm tube with adapter)
• Dimension: 165 x 115 x 75 mm (W x D x H), weight: 0.7 kg
• Connection: 12 V, 80 mA
