EL-PRESS Digital Electronic Pressure Meters / Controllers
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EL-PRESS Digital Electronic Pressure Meters and Controllers

Introduction Bronkhorst High-Tech B.V., the European market leader in thermal Mass Flow Meters/Controllers and Electronic Pressure Controllers, has many years experience in designing and manufacturing precise and reliable measurement and control devices. With a wide range of instruments, Bronkhorst® 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 such diverse applications as semiconductor and analytical...

> Measuring principle The Bronkhorst® EL-PRESS pressure sensor is a piezoresistive 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....

Examples of some applications It is of course impossible to picture the possible number of applications. Here is a limited quantity of basic examples, which are often seen with some variations. However, identical or similar configurations are used in totally different applications. Therefore please consider the ones pictured here as examples for solving common applications. Pressure control combined with flow measurement ack pressure control independent of gas mix and B total flow Process Chamber (reactor) Burner Gas Electronic Back Pressure Controller Flow Meter Electronic Forward Pressure...

> Models and pressure ranges Measurement / control system Electronic Pressure Transducers (EPT) > Model number identification P-NNNAA - NNNA - A A A - NN Base model See above Sensor code Digital communication standard: RS232 options: DeviceNet™, CANopen®, PROFIBUS®DP, Modbus RTU/ASCII, FLOW-BUS, EtherCAT®, PROFINET, Modbus/TCP, EtherNet/IP, POWERLINK Factory selected Analog output A 0.5 Vdc B 0.10 Vdc F 0.20 mA sourcing Electrical connection Analog/RS232 9-pin D-connector (male); Profibus DP bus: 9-pin D-connector (female); power: 9-pin D-connector (male) DeviceNet™, CANopen® 5-pin...

> Principle of operation The Process Pressure Controller consists of a piezo-resistive pressure sensor and two direct acting, solenoid control valves. The instrument has a gas inlet for pressurisation, a pressure relief outlet and a system outlet. While pressurizing the system - this will normally be a static volume - the pressure sensor and the inlet valve operate as a forward pressure controller and the relief valve remains shut. When the system requires depressurisation, the inlet valve is shut and the pressure sensor in combination with the relief valve will act as back pressure...

> Models and pressure ranges Measurement / control system Accuracy (incl. linearity and hysteresis) Pressure control rangeability Repeatability Response time sensor Max. Kv-value Max. pressure difference (AP) Max. flow Control stability Process Pressure Controller (PPC) Models Pressure ranges (abs/rel) 1:20 with flow range 1:50 < 0,25% RD 2 msec 1,56 x 10-3 P-802CV: 64 bar (d) P-812CV: 100 bar (d) P-822CV: 200 bar (d) approx. 20 b/min N2 < ± 0,1% FS (typical for 100 mln/min N2 at specified process volume) Temperature sensitivity < ± 0,1% FS/°C Leak integrity (outboard) tested < 2 x 10-9...

Bronkhorst High-Tech designs and manufactures innovative instruments and subsystems for low-flow measurement and control for use in laboratories, machinery and industry. Driven by a strong sense of sustainability and with many years of experience, we offer an extensive range of (mass) flow meters and controllers for gases and liquids, based on thermal, Coriolis and ultrasonic measuring principles. Our global sales and service network provides local support in more than 40 countries. Discover Bronkhorst®! Bronkhorst High-Tech B.V. Nijverheidsstraat 1a www.bronkhorst.com NL-7261 AK Ruurlo,...