Bronkhorst IN-FLOW - Manual (Page 9)

BRONKHORST HIGH-TECH B.V.
9.17.022 page 9
1 Introduction
1.1 General description
1.1.1 Gas flow
The Bronkhorst High-Tech B.V. series mass flow meter for gases is an accurate device for measuring gas
flows up to 700 bar depending on body rating, virtually independent of pressure and temperature changes.
The system can be completed with a control valve and flexible readout to measure and control gas flows from
1 ml
n
/min up to several thousand m 3
n
/h, depending on the specific type of instrument.
For limited flow ranges a metal sealed model is available.
1.1.2 Liquid flow
The Bronkhorst High-Tech B.V. mass flow meter for liquids is an accurate device for measuring liquid flows
up to 400 bar depending on body rating, virtually independent of pressure and temperature changes. The
system can be completed with a control valve to measure and control liquid flows from 2g/h up to 1000g/h.
1.1.3 Pressure
The Bronkhorst High-Tech B.V. pressure meter measures pressures from 100 mbar up to 400 bar depending
on body rating, either absolute pressure or gauge pressure and in the range 0 to 15 bar differential pressure
too. The pressure controller controls pressure with a very high accuracy and repeatability. The controller is
available in forward control (P-600 series) and backward control (P-700 series).
The flow going through the pressure controller depends on up and downstream pressures, the orifice
diameter of the valve and kind of fluid.
1.1.4 Housings
Each instrument housing style incorporates several provisions to comply with EMC requirements.
EL-FLOW ® , EL-PRESS
The p.c.board is placed in a metalized plastic cover. For electrical connection the
instrument has a male 9-pin miniature sub-D connector for analog/RS232 operation.
For digital operation the instrument has various connectors on top. These
instruments are suited for dry (indoor) applications, like laboratories and in well
protected (OEM) housings.
EL-FLOW ® , EL-PRESS metal seal
This series has the same housing as the standard EL-FLOW ®, EL-PRESS series,
but this series distinguish itself by metal-to-metal seals.