Bronkhorst
MASS FLOW METERS / CONTROLLERS FOR LIQUID - LIQUI-FLOW™ series

LIQUI-FLOW™ THERMAL MASS FLOW METERS / CONTROLLERS FOR LIQUIDS

Through-Flow Measurement of Low Liquid Flow Rates

LIQUI-FLOW™ digital Liquid Flow Meters/Controllers for low flow ranges operate on a thermal, through-flow measuring principle. The instruments are equipped with a digital pc-board, featuring self-diagnostics, alarm and counter functions, digital communication (RS232) and a variety of fieldbus options.

  • Lowest range 0,25 ... 5 g/h
  • Highest range 20 ... 1000 g/h for fluids with thermal properties similar to H2O

 

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E-book: How to handle low liquid flows

Focusing on low liquid flows < 100 g/h

Download the e-book 'How to handle low liquid flows' to find out more about 'low flows'. Including in-depth information, technical advice and insider tips from our experts.

Download e-book
Quick link to Mass Flow Meter / Controller model pages

Full Scale capacities (based on H2O) versus Pressure Rating

PN 100 bar (Mass Flow Meter) PN 100 bar (Mass Flow Controller)
L13  |  5 ... 100 g/h L13V12  |  5 ... 100 g/h
L23  |  100 ... 1000 g/h L23V12  |  100 ... 1000 g/h

Features

  • Fast and accurate measurement
  • No moving parts
  • Thru-Flow measurement
  • Suitable for liquids with low boiling point
  • Attitude insensitive
  • Very small internal volume
  • In combination with a control valve: continuous and stable control
  • Analog I/O-signals, RS232-connection; optional on-board fieldbus interface

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Liquid Flow Meters / Controllers

Liquid Flow Meters

Liquid mass flow meters of the LIQUI-FLOW™ series are built around a stainless steel tube without any moving parts or obstructions. The heater/sensor assembly is arranged around the tube and, by following the anemometric principle, a constant difference in temperature (ΔT) is created and the energy required to maintain the ΔT is dependent on the mass flow rate. Due to the benefits of the unique patented sensor, the fluid will be warmed to a maximum of 5°C, thereby making the LIQUI-FLOW™ Series suitable for fluids with low boiling points.

Liquid Flow Controllers

Flow control is achieved by integrating a control valve onto the body of the Liquid Flow Meter. This control valve has a purge connection to eliminate air or gas during start-up. The electronic control function forms part of the normal circuitry in the meter.

Note:
For ultra low flow ranges, Bronkhorst offers the µ-FLOW series. Ranges: 1,5 ... 30 mg/h up to 0,1 ... 2 g/h IPA- or H2O-equivalent.

Downloads

Brochures
LIQUI-FLOW brochure

Manuals
Manual LIQUI-FLOW incl u-FLOW

Hook-up diagrams
Analog IO - RS232
DeviceNet
EtherCAT
FLOW-BUS
Modbus RTU/ASCII
PROFIBUS DP
PROFINET
CANopen
EtherNet/IP
Modbus-TCP
POWERLINK
Optional Bus and IO Configurations
MASS-STREAM Waste water application

Applications

  • Semiconductor industry
  • Pharmaceutical industry
  • Food industry (flavors, additives)
  • Biotechnical industry
  • Analytical laboratories
  • HPLC-applications
 

Application story


BRONKHORST (UK) Ltd

1 Kings Court
Willie Snaith Road
Newmarket Suffolk CB8 7TG
Tel. +44 1223 833222
sales@bronkhorst.co.uk

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