Bronkhorst

μ-FLOW L01

Ultra Low-Flow Thermal Liquid Mass Flow Meter

  • Fast and accurate measuring signal
  • Insensitive to mounting position
  • Very small internal volume (sensor: 1,5...33 μl)
  • Suitable for liquids with low boiling points
  • Analog, RS232 or fieldbus communication
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μ-FLOWL01

Liquid Mass Flow Meters for Ultra Low Flow Rates

Bronkhorst® model L01 Liquid Flow Meters (LFMs) are suited for precise measurement of flow ranges between 5…100 mg/h and 0,1...2 g/h at operating pressures up to 400 bar. The LFM consists of a thermal mass flow sensor and a microprocessor based pc-board with signal and fieldbus conversion and a PID controller for optional mass flow control by means of a separately mounted control valve.

μ-FLOW series are equipped with a digital pc-board, offering high accuracy, excellent temperature stability and fast response. The main digital pc-board contains all of the general functions needed for measurement and control. In addition to the standard RS232 output the instruments also offer analog I/O. As an option, an on-board interface can be mounted to provide DeviceNet™, PROFIBUS DP, Modbus or FLOW-BUS protocols.


Technical specifications

Measurement system
Accuracy (incl. linearity)
(based on actual calibration)
±2% FS
Turndown 1:20 (5...100%)
Repeatability < 0,2% FS (typical H2O)
Operating temperature 5…50°C
Temperature sensitivity ±0,2% FS/°C
Attitude sensitivity negligible
Warm-up time approx. 10 min. for accuracy ± 2% FS
Mechanical parts
Material (wetted parts) stainless steel 316L/320;
others on request
Pressure rating 400 bar abs
Process connections 1/16” or 1/8” OD compression type; other on request
(<1 g/h we advise to use 1/16" only)
Seals Metal
Ingress protection (housing) IP40
Electrical properties
Power supply +15…24 Vdc +/-10%
Max. power consumption
(meter only)
Supply
15 V
24 V
at voltage I/O
100 mA
65 mA
at current I/O
120 mA
85 mA
PROFIBUS DP add 53 mA (15 V supply) or 30 mA (24 V supply)
DeviceNet™ add 48 mA (24 V supply)
Analog output 0...5 (10) Vdc or 0 (4)...20 mA (sourcing output)
Digital communication standard: RS232;
options: PROFIBUS DP, DeviceNet™, Modbus RTU or ASCII, FLOW-BUS
Electrical connection
Analog/RS232 9-pin D-connector (male)
PROFIBUS DP bus: 9-pin D-connector (female);
power: 9-pin D-connector (male)
Devicenet™ 5-pin M12-connector (male)
FLOW-BUS/Modbus-RTU/ASCII RJ45 modular jack

Technical specifications and dimensions subject to change without notice.


Downloads

Brochures
μ-FLOW series L01 brochure

Manuals
General manual digital instruments
Operating instructions digital instruments

Hook-up diagrams
Analog IO - RS232
DeviceNet
FLOW-BUS
Modbus
PROFIBUS DP


Bronkhorst High-Tech B.V.

Nijverheidsstraat 1A
NL-7261 AK Ruurlo (NL)
Tel. +31 573 45 88 00
info@bronkhorst.com

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