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µ-FLOW series L010 pages
µ-FLOW
Series L01 / L02 Digital Mass Flow Meters / Controllers for Liquids
> Introduction
Bronkhorst High-Tech B.V. has been the pioneer in the field of
micro to low flow liquid metering instruments based on a thermal
measuring principle. A wealth of experience has been gathered
over the past 30 years, which has resulted in three product series
that cover Full Scale flow ranges from 75 mg/h up to 20 kg/h.
> For ultra low flow ranges
Today’s market for liquid flow meters tends to develop into the very
small flow ranges. With the thermal liquid mass flow meters / controllers of the μ-FLOW Series, Bronkhorst High-Tech offers the
solution for this complicated task. The compact L01 series can be
supplied in ranges from 5…100 mg/h up to 0,1…2 g/h with a
pressure rating up to 400 bar. For even higher pressures,
up to 1000 bar (15000 psi), the L02 series can be offered for
7,5...150 mg/h up to 22,5...450 mg/h (based on H2O). In addition to
the standard RS232 output the instruments also offer analog I/O.
Moreover, an optional interface to PROFIBUS DP, DeviceNetTM,
Modbus, EtherCAT® or FLOW-BUS can be integrated.
> μ-FLOW series L01 / L02
The μ-FLOW L01/L02 mass flow meter is basically a straight sensor
tube without any moving parts or built-in obstructions. The heater/
sensor assembly utilises the heat transfer principle and is arranged
around the tube. Upon flow, the ΔT is sensed by the upstream and
downstream temperature sensors and this ΔT is a function of both
the flow-rate and heat capacity of the liquid to be measured.
> Liquid flow control
Flow control is achieved by integrating a control valve onto the
body of the liquid flow meter. This control valve, with a pressure
rating of 100 bar, has a purge connection on top of the sleeve that
enables easy elimination of air or gas when starting up the system.
The electronic control function forms part of the normal circuitry
in the liquid flow meter, so the need for an external controller is
eliminated.
> General features μ-FLOW series L01 / L02
utfast and accurate measuring signal
utinsensitive to mounting position
utvery small internal volume (sensor: 1,5…33 μl)
utstainless steel sensor
ut ressure rating of 100 bar for flow controllers
p
up to 1000 bar for flow meters
utsuitable for liquids with low boiling points
utfor laboratory and OEM applications
> Digital features
utDeviceNetTM, PROFIBUS DP, Modbus, EtherCAT® or
FLOW-BUS slave
utRS232 interface
ut larm and counter functions
a
> Fields of application
utSemiconductor industry
utHPLC applications
utChemical industry
utFood & Pharmaceutical industry
utAnalytical laboratories
