BRONKHORST IN-FLOW, Instruction Manual

Page: 9 / 38

BRONKHORST
®
9.17.022 page 9
1 Introduction
1.1 General description
1.1.1 Gas flow
The Bronkhorst
®
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
®
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
®
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.