Densitometers 15 - Grant Instruments

Densitometers 15 - Grant Instruments
15 Densitometers
Densitometers
DEN-1 for 0.5 - 4.0 McFarland units
DEN-1B for 0.00 - >7.5 McFarland units, battery powered
Densitometers
Densitometers » DEN-1 and DEN-1B
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)
n
n
n
n
Measurement time: 1 second
Precision: ± 3%
Standard deviation at 3.00 McF units: ± 0.1 McF
User calibration option
Designed for tubes with an outer
diameter of 18 mm.
16 mm tubes can also be
accommodated by using the
optional tube adaptor D16
(included)
Factory calibrated – retains
calibration without power supply.
Can be user calibrated with
commercial standards or cell
suspensions prepared in the
laboratory
DEN-1 and DEN-1B units are
calibrated for operation in range
0.5-4 McF and 0->7.5McF, but it
is possible to measure turbidity
from 0McF to 15McF (note: the
standard deviation of the values
increases).
DEN-1B densitometer shown
(suspension turbidity meter)
Readings, conveniently shown in
McFarland units, are clearly visible
on the bright LED display
Extremely compact design with
small footprint and low profile
– fits easily into the smallest
workspace
Powered by 3 x AA batteries (DEN1B only) or via external 12v power
supply
Note: 1 McF unit is approximately equal to 38 x 10 CFU/ml
Applications:
n Life-science - typical applications include determining concentration of cells (bacterial and
yeast cells) in the fermentation process, detecting the susceptibility of micro-organisms to
antibiotics, identifying micro-organisms with various test systems, and measuring optical density
at fixed wavelength
© Grant Instruments (Cambridge) Ltd
www.grantinstruments.com » Densitometers
15.1
Densitometers
Densitometers » DEN-1 and DEN-1B » Specifications
Densitometers – specification
Densitometers
DEN-1
DEN-1B
h: 75 mm
d: 115 mm
w:165 mm
weight: 0.7 kg
h: 75 mm
d: 115 mm
w:165 mm
weight: 0.7 kg
Light source
LED
Wavelength RangeMcFarland units
565 ± 15
lnm
0.3 to 15.0
0.00 to 15.00
Precision
±3%
sec
1
Tube diameter,
Measurement time
external diameter
mm
18
with D16 adaptor
mm
16
ml
>2
Sample volume
Display / display resoluton
LED / 0.1 McF
LCD / 0.01 McF
External power supply
12V
Independant power supply
Ambient temperature range
Power supply
-
3 x AA batteries
°C
+ 4 to 40
V
100-240
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.
D16 spare tube adaptor for tubes with 16mm
outer diameter
(included as standard)
15.2
© Grant Instruments (Cambridge) Ltd
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