DensiTune Portable
The fluid mud density probe
Stema Systems is proud to announce the new
DensiTune Portable. A light weight system,
complete in case appr 15 kg, that can easily travel
hand carried and is optimized to operate from any
vessel of opportunity. This will enable the
assessment of the nautical depth or pinpoint
problems with fluid mud presence on short notice
on any location.
SOME HISTORY
The DensiTune, developed in the mid-nineties, was the first
practical and worldwide deployable in-situ density meter. In
the 2005 followed up by the RheoTune probe. This probe
had increased functionality and facilitated the calibration
method. The RheoTune inherited the housing of the
DensiTune. This body was primarily design for winch
operation. Manual operation is possible but not very
practical.
PORTABILITY AND FAST MOBILIZATION
The integration of the Tune vertical profiles with acoustic
surveys for nautical depth assessment, was found to
require a unit that can quickly mobilised and easily
deployed. For the acoustic calibration the main parameter
of interest is mud density and this is still the adopted
parameter for nautical depth definition. To comply with this
demand, we redesigned the DensiTune probe into a unit
that can be operated from any vessel in any place in the
world by any operator.
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Calibration free (semi-) fluid mud density
Light weight probe for easy manual operation
Option to add weight for stability and penetration
Field top unit with Wi-Fi data transmission to
laptop/Windows-tablet
24V DC powered works on battery (battery pack with
AC adapter optional)
Optional: calibration free output of yield strength
THE DENSITY PORTABLE WILL BE YOUR PARTNER IN:
 Assurance of nautical accessibility of your harbor
 Calibration of Silas acoustic density mapping system
 Water bottom stability assessment in coastal studies
 Managing filling quantities in disposal area’s
 Monitoring of siltation quantities and fluid loads in
hopper bins
DensiTune Portable
The fluid mud density probe
Specifications
Output parameters
Density
Temperature
Depth (pressure)
Optional: yield strength
Optional: Dry Solids (calculated from density, requires input on specific mass
of grains)
Density
Accuracy
Resolution
Range
<1% of density (Newtonian fluid)
1 gr/l
1000 – 1500 gr/l (semi fluid materials with Bingham
yield strength < 1 kPa)
Temperature
Accuracy
Resolution
Range
1% FS
1 deg C
0 – 60 deg C
Depth
Accuracy
Resolution
Range
0,15 % of measured depth
0,01 m
0 – 25 m
Housing
Probe
Control box
Fibre reinforced polyamide / stainless steel (IP68,
40m)
Plastic case with external connectors (IP65)
Dimensions
Probe:
Control box:
Transport case:
450 mm x 150mm (diameter)
0,22 x 0,20 x 0,150 (m)
0,65 x 0,50 x 0,35 (m)
Weight
Probe:
Control box:
Transport total:
5 kg (+ max 5 kg extra weight optional)
2 kg
22 kg (excluding extra weight)
Power Supply
Input
Consumption
24 V DC
35 W
Output
Type
Ethernet UDP over Wi-Fi (internal antenna in control
box)
20 Hz
Update rate