EL-PRESS
Digital Electronic Pressure Meters / Controllers

General

The EL-PRESS series digital electronic pressure transducers and controllers for gases and liquids have a well-proven compact thru-flow design. The instruments include a diaphragm type piezo-resistive pressure sensor for pressure measurement/control from:

lowest ranges 2 ... 100 mbar absolute, gauge or differential
up to highest ranges 8 ... 400 bar absolute / gauge or 0,3 ... 15 bar dif.

The control valve design distinguishes itself from competitive designs in its truly modular construction and it can be field replaced or changed by the user without any adjustment. The standard valve is normally closed and is available up to Kv-values of 6.0. Normally opened valves can also be supplied.

"Multibus" Digital Pressure Meters / Controllers

Bronkhorst High-Tech developed their digital instruments according to the flexible "multibus" concept, due to which the instruments can be equipped with on-board interface board with DeviceNet^TM, Profibus-DP^®, Modbus, EtherCAT^® or FLOW-BUS protocol. More information about digital "multibus" communication.

The pressure controller performs with high accuracy and repeatability and should be specified for "forward pressure control" (P-600 series for control of downstream pressure "P₂") or "backward pressure control" (P-700 series for control of the upstream pressure "P₁"). See schematics on the right side.

Features

Thru-flow design
Compact arrangement
Stable control, even at varying process volumes
High pressure capability up to 400 bar
Metal sealed and/or down-ported versions available
High accuracy and repeatability

Applications

Gas and liquid chromatography
Fermenter pressure control (Biotechnology)
Vapour pressure control in MOCVD processes (bubbler systems)
Protective gas pressure control in extrusion moulding processes

Models and ranges

Instrument / Model type	Lowest range	Highest range
Pressure transmitters P-502C P-512C P-522C P-532C	2 ... 100 mbar 1,28 ... 64 bar 2 ... 100 bar 4 ... 200 bar	1,28 ... 64 bar 2 ... 100 bar 4 ... 200 bar 8 ... 400 bar
Differential pressure transmitters P-506C	2 ... 100 mbar	0,3 ... 15 bar
Forward pressure controllers (P₂-control) P-602C / P-602CV P-612C / P-612CV	5 ... 100 mbar 3,2 ... 64 bar	3,2 ... 64 bar 5 ... 100 bar
Backward pressure controllers (P₁-control) P-702C / P-702CV P-712C / P-712CV	20 ... 100 mbar 12,8 ... 64 bar	12,8 ... 64 bar 20 ... 100 bar

High pressure control (up to 400 bar): use pressure transmitter with separate control valve.

Sensor codes, ranges and burst pressure

(for sensors integrated in EL-PRESS instruments)

Sensor code	Pressure ranges (Full scale values; intermediate ranges available)	Burst pressure
Absolute pressure 350A 1K1A 6K0A 20KA M10A M40A	100 ... 350 mbara 0,35 ... 1,1 bara 1,1 ... 6 bara 6 ... 20 bara 20 ... 100 bara 100 ... 400 bara	1,4 bara 3,1 bara 10,5 bara 62 bara 200 bara 500 bara
Relative pressure 350R 1K1R 6K0R 20KR	100 ... 350 mbarg 0,35 ... 1,1 barg 1,1 ... 6 barg 6 ... 20 barg	1,4 barg 3,1 barg 10,5 barg 62 barg
Differential pressure 300D 1K0D 4K0D 15KD	100 ... 200 mbard 0,2 ... 1 bard 1 ... 4 bard 4 ... 15 bard	2,5 bard 4 bard 7 bard 30 bard