OnC PressSens™
Pressure and Level Transmitter
OnC PressSens™
Pressure and Level Transmitter
Dependable measurement and control systems are indispensable in the paper industry today.
To meet this need, Voith Paper has bundled comprehensive process know-how with innovative
technology to develop a new generation of high-quality pressure sensors for customized papermaking applications.
Applications
Technology
Voith Paper’s OnC PressSens
pressure and level transmitter is
specifically designed for reliable
measurement in the paper industry.
It can be used for measuring liquid
level, pressure or vacuum, according
to application, and is suitable for
media including water, steam, stock
suspensions, coating colors and
chemical additives.
The ceramic-capacitive sensor
element with protected radial seal
enables front-flush OnC PressSens
mounting in pipes, vats and chests,
tanks and storage towers. Thanks
to the extremely abrasion-resistant
ceramic, OnC PressSens is ideal
for use throughout recovered paper
stock preparation lines: from pulping
all the way to the headbox.
For applications with high temperatures and aggressive media such as
caustic soda, a tough stainless steel
diaphragm is used. Since the sensor
element works with internal transmission fluid and special temperature
compensation, the temperature influence is very slight and measurement
error is minimized.
The OnC PressSens™ product family
OnC PressSens product type
152
153
154
Special ceramic measuring cell, dia. 28 mm Special ceramic measuring cell, dia.17.5 mm
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164
165
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Stainless steel diaphragm measuring cell
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Process temperature >120° C
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Measurement range up to 600 bar
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Additional temperature data
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Accuracy < 0.2%
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Accuracy < 0.1%
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Accuracy < 0.075%
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Accuracy < 0.05%
Long-term stability < 0.1% p.a.
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Long-term stability < 0.05% p.a.
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Signal output 4 to 20 mA / HART
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Profibus PA
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Foundation fieldbus
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Absolutely front-flush mounting
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Connection to OnC TransValve
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Set-off connection n
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1: Headbox OnC PressSens 164
High-precision pressure measurement for controlling jet speed at the headbox. Optionally available is an electro-polished connection to protection
class IP 68, specially developed for this critical application.
2: Storage tower
OnC PressSens 154
Level measurement at the storage tower with transmitter replacement valve
for servicing.
No need to empty the storage tower.
3: Disk filter OnC PressSens 154/164
Vacuum measurement at the drop legs for monitoring disk filter functioning.
Level measurement for disk speed control.
4: Pressure screen
OnC PressSens 154/164
Inlet and outlet pressure measurement to determine differential pressure
and for stock feed alarm / shutdown.
5: Pumps
OnC PressSens 154/164
Pressure or speed control of the water system and stock pumps enables
energy savings, especially with different primary pressures or a variable
number of connected users.
6: HC cleaner
OnC PressSens 154/164
Inlet, outlet and overflow pressure measurement at the HC cleaner and
cleaner bank. The extremely high abrasion resistance of the special
ceramic against glass, stones, paper clips and sand guarantees long life.
7: Refiner
OnC PressSens 154/164
Refiner inlet pressure measurement for locking the fillings setting at
minimum pressure or the stock feed pump at maximum pressure.
8: Pulping
OnC PressSens 154/164
The pulper measuring cell is exposed to strong pressure pulses, extreme
turbulence and heavies impacts. The special ceramic ensures reliable level
measurement despite this.
9: Mixing chest / machine chest
OnC PressSens 154/164
Dependable level measurement at the mixing chest for stock component
flow control.
10: Under Machine Pulpers
OnC PressSens 154/164
Level measurement under extreme turbulence conditions at the Papermachine pulpers.
11: Microflotation
OnC PressSens 154/164
Level measurement during microflotation to ensure constant sludge
discharge.
12: Slot filter
OnC PressSens 154/164
Pressure measurement at the inlet and outlet to determine the degree of
filter contamination.
13: Steam pressure
OnC PressSens 152
Numerous alternative uses, such as measuring and controlling steam
pressure in the dryer section, or control of the stock preparation steam
supply for disperging.
14: Chemicals
OnC PressSens 153/165
Pressure or speed control of the chemicals pumps enables energy savings.
The tough metal diaphragm durably withstands high temperatures and
aggressive substances such as caustic soda.
Reliability
Operation
To meet the high demands on productivity and availability, particular
emphasis has been placed on
dependability. The robust housing
and sensor head easily withstand
vibrations, abrasion, pressure
surges and dirt. Accordingly, OnC
PressSens sensors are available
in protection class IP66/67 or IP68.
The electronics module is completely sealed and designed for continuous operation in moist environments.
All instruments comply with CE and
SIL standards.
The extremely compact OnC UniCom™ 910 plug-in display/control
module is ideal for permanent or
temporary installation, and needs no
power connection.
Should a defect nevertheless arise,
OnC PressSens sensors can be
easily and quickly exchanged. All
settings and calibration data can be
stored in the control module. This
saves time and prevents calibration
errors.
Process Connection
Innovative technology is incorporated in the OnC UniCom 910 control
module:
Powered from the sensor:
no separate supply required
Convenient local display and
control
Plug-in mounting in four positions
90° displaced
Permanent storage of calibration
data and settings
Illuminated display for easy
reading
Wide choice of units (e.g. mbar,
bar, psi, Pa)
Comprehensive service and
diagnostics menu functions with
clear text display
Many different languages
selectable
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OnC PressSens sensors are available with all commercial threaded
and flanged mountings. Customized
mountings for many applications are
also available. The small ceramic
cell (17.5 mm diameter) can be fully
flush-mounted in small pipes.
The optional OnC TransValve
replacement valve can be installed
under pressure without interrupting
operation.
Housing / signal output
This single-chamber housing in
powder-coated diecast aluminum
is well proven in all paper industry
applications.
The OnC PressSens 164 headbox
pressure sensor has a tough stainless steel housing to protection
class IP 68, with separate electronics module.
Signal transmission by the integrated
electronics system is via 4-20 mA /
HART, Profibus PA or foundation
fieldbus, according to need. This
enables full integration in all control
system environments.
Voith Paper Ltd.
Manchester/Great Britain
Tel. +44 161 643 9273
Fax +44 161 653 3114
Voith Paper Automation
GmbH & Co. KG
St. Pöltener Straße 43
89522 Heidenheim/Germany
Tel. +49 7321 37 3000
Fax +49 7321 37 7733
Voith Paper SAS
Orsay/France
Tel. +33 164 86 5570
Fax +33 164 46 6549
Voith Paper Automation
GmbH & Co. KG
Ravensburg/Germany
Tel. +49 751 83-2991
Fax +49 751 83-2982
Voith Paper Automation
GmbH & Co. KG
Krefeld/Germany
Tel. +49 2151 896-0
Fax +49 2151 896-253
Voith Paper Automation
GmbH & Co. KG
St. Pölten/Austria
Tel. +43 2742 806-2280
Voith Paper AB
Spånga-Stockholm
Sweden
Tel. +46 8 622 07 40
Fax +46 54 15 32 43
Voith Paper S.A.
Ibarra (Guipúzcoa)/Spain
Tel. +34 943 67 37 99
Fax +34 943 67 28 48
Voith Paper S.r.L.
Schio (Vicenza)/Italy
Tel. +39 0445 690 500
Fax +39 0445 690 510
Voith Paper Automation
Office St. Petersburg/Russia
Tel. +7 812 325 82 03
Fax +7 812 326 22 49
Voith Paper Oy
Vantaa/Finland
Tel. +358 102184400
Fax +358 102184411
Voith Paper Inc.
Appleton (WI)/USA
Tel. +1 920 731 7724
Fax +1 920 731 0240
Voith Paper
Máquinas e Equipamentos Ltda.
São Paulo (SP)/Brazil
Tel. +55 11 3944 4000
Fax +55 11 3941 3979
Voith IHI Paper Technology Co., Ltd
Tokio/ Japan
Tel. +81 3 3277 4100
Fax +81 3 3277 4130
Voith Paper Automation
Office: Kunshan/China
Tel. +86 21 520 80388
Fax +86 21 520 80355
PT. Voith Paper
Jakarta/Indonesia
Tel. +62 21 78845922
Fax +62 21 78845985
Voith Paper Automation
Office Korea
Tel. +82 11 345 7700
Fax +82 31 302 2787
Voith Paper Automation
Office Mexico
Tel. +52 427 2268 428
Fax +52 427 2723 308
www.voithpaper.com
fieldinstruments@voith.com
aut 1037 den yk|dm 2009-05 1000 Technical data and illustrations subject to change!
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