BenthoTorch

bbe moldaenke

biological

biophysical

engineering

bbe

moldaenke

Wildrosenweg 3 | 24119 Kronshagen | Germany phone (+49) 431 38040-0





fax

(+49) 431 38040-10



e-mail info@bbe-moldaenke.de

net

www.bbe-moldaenke.de

The BenthoTorch

A unique instrument for quick and easy phytobenthos measurements

For measurements on substrates of ...

. green algae

. cyanobacteria and

. diatoms



B ild z

mm weispaltig 125

Various algal species have adapted their nutrient uptake systems enabling them to survive in shallow water close to the shoreline where sunlight stil penetrates to the sea or river bed. This habitat is home to benthic algae, ranging from the microscopic to the enormous. Such flora, attached to the sea bed, play an essential r ole in primary production.

The

European

Water

Framework

Directive (2000) stipulates that the ecological status of water masses must be assessed. In order to do this, several biological elements must be considered, bbe BenthoTorch: for measurement of benthic algae on different substrates including benthic algae. As a result, it has become obligatory to study the Benthic algae measurements have This technique has been wel -proven development and abundance of benthic become

much



easier

with

the

for pelagic phytoplankton, by extensive communities.

The

col ected

data



development of the BenthoTorch, which application of the bbe FluoroProbe, and satisfactorily

contribute

to

the

enables quick and easy analysis of has now been successful y adapted to assessment of water quality in aquatic benthic algae in real time and in situ by measure benthic algae concentrations.

ecosystems.

utilising the fluorometric characteristics of the different algal pigments in the Features

.

Traditional methods include sampling of intact cel . Thus, no sample preparation is

.

benthic algae by scraping surface needed.

.no sample preparation automatic substrate correction materials or rapid deep-freezing and The amount of red light fluorescence integrated instrument display subsequent

chlorophyl

extraction.

arising from

excitation at different

.

However,

these

methods

cannot

wavelengths gives a quantitative estim-GPS sensor

.

determine

different

algal

groups.

ate of the algal density and its cable-free operation

.

Alternatively, the use of time-consuming classification. The BenthoTorch is pre-datalogger function

.

microscopy is limited to accessible objects calibrated for the most prominent algal internal rechargeable batteries

.

rarely found in the field.

classes to be found in the field.

USB connection to PC/laptop

www.bbe-moldaenke.de





Bentho Torch

bbe moldaenke

Operation

To switch the bbe BenthoTorch on, simply tilt it upwards and then downwards in one swift movement. To operate the instrument, four contact keys are situated on the housing next to the display. An intel igibly presented menu enables one-step measurement. The illuminated display gives clear readings of results even in bright sunlight. After starting a measurement, all steps are processed automatical y: the countdown, the LED

tuning and display of the results. A vibration signal informs the user about completion of the measurement.

Applications

. EU Water Framework Directive

.. water quality parameters restoration and rehabilitation projects environmental monitoring BenthoTorch used in the AQUAREHAB project in Denmark and Belgium

.. limnological work research and education Instrument software functions

. start and stop of measurement

.PC software functions dis

i p

s lay

a

y of

o

f t

im

i e

m

e d

a

d t

a a as

a a g

s ra

r ph

p ic

.

.

access to al stored data data retrieval and management

.

.

(re-)calibration of instrument data export to ASCII files

.

.

settings: measurement duration, GPS data export to e.g. Google Earth measurement interval, GPS on/off BenthoTorch LCD display Technical Data

Measurands



concentration of green algae [ g chl-a/cm ]

Measurement

concentration of blue-green algae [ g chl-a/cm ]



concentration of diatoms [ g chl-a/cm ]



The bbe BenthoTorch is a robust, field GPS co-ordinates

instrument for the rapid quantification of Measuring range

0 - 10 g chl-a/cm

green algae, cyanobacteria and diatoms on Resolution

0.2 g chl-a/cm

different substrates such as sediments and Weight

1.8 Kg

stone surfaces.

Size (H x )

500 x 60 mm

A measurement is performed in less than 15

Power supply

110/230 V @50/60 Hz - 12V DC

seconds. Just turn it on, place on the Protection class

IP68

substrate, and read off the results.

Depth range

10 m

Data interface

USB

Your local representative...

Memory capacity

1,000 datasets

Software

bbe data evaluation software for Windows Options

telescopic rod

www.bbe-moldaenke.de