EL-PRESS Pressure Meter and Controller

• 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

EL-PRESS Multibus Digital Pressure Meters and Controllers

The EL-PRESS Pressure Meter and Controller performs with high accuracy and repeatability and should be specified for:

• Forward Pressure Control – P-600 series for control of downstream pressure “P₂“
• Backward Pressure Control – P-700 series for control of the upstream pressure “P₁“
• Process Pressure Control – P-800 series, a dual-valve design for pressure control inside closed compartments or systems

Bronkhorst digital instruments offer a flexible multibus concept, due to which the instruments can be equipped with on-board interface board with CANopen, DeviceNet, EtherCAT, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK, or FLOW-BUS protocol.

Compact Pressure Meters with High Accuracy

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 accurate and reliable absolute, relative (gauge), or differential pressure measurement.

Various integrated or separate control valves can be offered for specific field of application there are different series of 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 ΔP and a bellows valve for applications with very low differential pressure.

Pressure Measurement with EL-PRESS Pressure Meter and Controller

The Bronkhorst EL-PRESS pressure sensor is a piezo resistive bridge on the surface of a silicon chip. This chip is drilled out on its reverse side, giving the inside of the chip the form of a pressure diaphragm whose thickness determines the pressure range. When a pressure acts on this chip, the diaphragm flexes, and the resistor values of the bridge alter in proportion to the pressure. The measuring cell is separated from the external pressure by a thin, sensitive stainless steel diaphragm, and the sealed off cavity between diaphragm and cell is filled with oil.

Common Uses for EL-PRESS Pressure Meter and Controller

• Gas and liquid chromatography
• Fermenter pressure control (Biotechnology)
• Vapor pressure control in MOCVD processes (bubbler systems)
• Protective gas pressure control in extrusion moulding processes
• Plasma spraying
• Semiconductor processing
• Autoclave / reactor pressure control