Bronkhorst

LIQUI-FLOW™ L13

Digital Thermal Liquid Mass Flow Meter

  • Fast and accurate measuring signal
  • Insensitive to mounting position
  • Very small internal volume
  • Suitable for liquids with low boiling points
  • Analog, RS232 or fieldbus communication
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LIQUI-FLOW™L13

Liquid Mass Flow Meters for low flow rates

Bronkhorst® model L13 Liquid Flow Meters (LFMs) are suited for precise measurement of flow ranges between 0,25…5 g/h and 5...100 g/h at operating pressures up to 100 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.

LIQUI-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, EtherCAT® or FLOW-BUS protocols.


Technical specifications

Measurement / control system
Flow range (intermediate ranges available)min. 0,25…5 g/h
max. 5…100 g/h
(based on H2O)
Accuracy (incl. linearity) (based on actual calibration)± 1 % FS
Repeatability< 0,2 % FS (typical H2O)
Turndown ratioFS <50 g/h : 1:20 (5…100%);
FS >50 g/h : 1:50 (2…100%)
Operating temperature5 … 50 °C
Temperature sensitivity± 0,1% FS/°C
Attitude sensitivitynegligible
Warm-up time30 min. for optimum accuracy;
2 min for accuracy ± 2% FS
Mechanical parts
Material (wetted parts)stainless steel 316L/320;
other on request
Pressure rating (PN)100 bar abs
Process connectionscompression type or face seal (VCR/VCO) couplings
SealsKalrez®; other on request
Ingress protectionIP40
Electrical properties
Power supply+15 … 24 Vdc +/-10%
Max. power consumption meter
Supply
15 V
24 V
at voltage I/O
100 mA
65 mA
at current I/O
120 mA
85 mA
extra for fieldbus
<75 mA
<50 mA
Analog output0…5 (10) Vdc or 0 (4)…20 mA (sourcing output)
Digital communicationstandard: RS232;
options: PROFIBUS DP, DeviceNet™, EtherCAT®, Modbus RTU, FLOW-BUS
Electrical connection
Analog/RS2329-pin D-connector (male)
PROFIBUS DPbus: 9-pin D-connector (female);
power: 9-pin D-connector (male)
CANopen® / DeviceNet™5-pin M12-connector (male)
FLOW-BUS/Modbus-RTU/ASCIIRJ45 modular jack
EtherCAT®/ PROFINET2 x RJ45 modular jack (in/out)
Control valve options
External actuator options to be connected to the controller
Ex-proof specifications
Approvals / certificates

Technical specifications subject to change without notice.

For dimensional drawings and hook-up diagrams please visit the product page on our website

Downloads

Brochures
LIQUI-FLOW series L10-L20 brochure

Manuals
General manual digital instruments
Operating instructions digital instruments

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

Dimensional drawing
Dimensional drawing LIQUI-FLOW L13


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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