> Introduction
Bronkhorst High-Tech B.V., the European market leader in thermal
Mass Flow Meters/Controllers and Electronic Pressure Controllers,
has more than 25 years experience in designing and manufacturing
precise and reliable measurement and control devices. With a wide
range of instruments, Bronkhorst High-Tech offers innovative
solutions for many different applications in many different markets.
The instruments are made to customers’ specification, in various
styles, suitable for use in laboratory, industrial and hazardous areas.
> IN-PRESS series for industrial
environments
The digital electronic Pressure Meters and Controllers of the
IN-PRESS series are of rugged design (IP65) for use in pilot and
production plants in industrial environments or even Zone 2 hazardous
areas, due to their ATEX Category 3 approval. The instruments
have a well-proven compact thru-flow design and are available in
pressure ranges from 2…100 mbar up to 8…400 bar, both in absolute
and relative (gauge) pressure. The pressure
controller performs
with high accuracy and repeatability and should be specified for
forward or backward pressure control.
> State of the art digital design
The IN-PRESS Pressure Meter/Controller is equipped with a
diaphragm type piezoresistive pressure sensor and a digital pcboard,
as standard offering high accuracy, stability and reliability.
The main digital pc-board contains all of the general functions
needed for measurement and control. In addition to the standard
RS232 output the instruments also offer analog I/O. As an option, an
integrated interface board provides DeviceNetTM, PROFIBUS-DP®,
Modbus-RTU or FLOW-BUS protocols. The latter is a fieldbus
based on RS485, specifically designed by Bronkhorst High-Tech for
their mass flow and pressure metering and control solutions.
> Pressure Controllers for every application
The pc-board of an IN-PRESS Pressure Meter features integrated,
adaptable PID control for fast and smooth control of any electronically
driven valve. With reference to the specific fields of application
there are different series of unique Bronkhorst High-Tech proportional,
electromagnetic control valves.
There is a standard direct acting valve for common applications, a
pilot operated valve for high flow rates, the so-called Vary-P valve
that can cope with up to 400 bar ÄP and a bellows valve for applications
with very low differential pressure.
> General IN-PRESS features
u Weatherproof IP65 housing
u ATEX approval Cat.3, Zone 2
u high accuracy and repeatability
u high pressure capability up to 400 bar
u suitable for gases and liquids
> Digital features
u standard analog 0…5(10) V / 0(4)…20 mA and digital RS232
communication
u optional fieldbus interface (DeviceNetTM / PROFIBUS-DP® /
Modbus-RTU / FLOW-BUS)
> Fields of application
u Process pressure control in food, pharma and
(petro-) chemical industries
u Fermenter pressure control (Biotechnology)
u Fuel Cell technology
u Protective gas pressure control in extrusion moulding
processes
IN-PRESS
Industrial Style Digital Pressure Meters and Controllers
