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LOW FLOW SENSORS |
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LIQUID
FLOW SENSORS - MODEL 800 |
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Because of
increasing quality standards and higher efficiency demands
in processes the market for flow sensors is growing strong.
The last decades many different technologies have been
developed to measure flow. Each with specific dependencies
and for a specific field of application.
There is a large gap between high-end and general purpose
instrumentation, where accuracy and price per unit form
the main differences.
SwissFlow has pioneered in developing technology to make
a combination of reliability, high accuracy, long lifetime
in one instrument.
With the very competitive price level the instrument is
available for every field of application. It therefore
meets all the demands of the markets. |
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TECHNOLOGY |
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| Reliable |
Reliability
is one of the reasons to select this principle,
but this unique sensoralso provides an outstanding
accuracy.
This sensor also distinguishes itself from others
on life time. With any mechanical principle there
is a restricted life time caused by internal friction.
The turbine in the sensor is designed to be free
from friction. |
| Accuracy |
| Life
time |
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CONSTRUCTION |
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The patented
SwissFlow technology is based on a small rotor, weighing
only 0,04 gram. The material used is Vectra, a liquid
crystal polymer selected because of it's low weight and
excellent chemical and thermal resistance.
The rotor is placed in a PVDF housing. At the inlet of
the housing a swirl in the fluids pattern is generated.
This controlled swirl is caused by a series of flow formers.
The swirl is directed to the rotor blades and this will
cause the rotation. Due to the low weight, the rotor will
be able to float in the flow stream. The rotor will be
lifted from its axis and will start to revolve proportional
to the flow without friction.
The rotation is detected using an infrared beam. The rotor
is interrupting the infrared signal and this will provide
directly the pulse output. The infrared beam is generated
by a diode and detected by a photo transistor on the integrated
electronics.
The electronics is placed and fixed around the rotor housing.
rotor. With O-rings the elements are placed in an outer
housing. This outer housing is also made from PVDF and
shields any external infrared light from the electronics.
The two parts of the outer housing are ultrasonically
welded together.
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SPECIFICATIONS
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| Flow
range |
0,5..20
l/min* |
| Accuracy |
±1,0
% of reading |
| Reproducibility |
±0,3
% of reading |
| Liquids |
translucent
liquids / water, chemicals, oils |
| Operating Pressure |
max.
16/250 bar |
| Temperature |
-20..90°C |
| Viscosity range |
up
to 1000 Cst |
| Output |
100..2000
Hz |
| Sensitivity
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±6000
pulses / liter |
| Signal form
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Square
wave |
| Amplitude |
see
power supply |
| Power Supply |
5..24
Vdc, 12..36 mA |
| Electrical
connection |
15
cm,3 wire flat cable / connector |
| Process connections |
3/8"
BSP male/female |
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MARKET
APPLICATIONS |
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- Beer & Beverages
- Hot Water Appliances
- Distribution Measurement
- Chemical Dosing Equipment
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- Medical Equipment
- Hydraulic Systems
- Automotive
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