Bronkhorst Mass Flow - Manual (Page 7)

BRONKHORST HIGH-TECH B.V.
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 3 ml
n
/min up to several thousand m 3
n
/h, depending on the specific type of instrument.
For a limited flow range 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, virtually independent of pressure and temperature changes. The system can be completed
with a control valve to measure and control liquid flows.
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.
1.2 Housings
Each instrument housing style incorporates several provisions to comply with EMC requirements.
1.2.1 EL-FLOW ® , EL-PRESS (Euro-style)
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. These instruments
are suited for indoor (dry) applications, like laboratories and in well protected
(OEM) housings.
1.2.2 Liquid flow meter / controller
The LIQUI-FLOW® models for up to 1000 g/h. This is a fully aluminium casted
instrument, which means that the instrument is formed by the housing.
This model has an IP-65 ingress protection class. For electrical connection a
round male 8-pin DIN connector is incorporated in the design.
The instrument is suited for light industrial (outdoor) use.
9.17.001 page 7