Micro Fluidic Mass Flow Meter for liquids

  • Fast and accurate measuring signal
  • Insensitive to mounting position
  • Very small internal volume (0,88 mm3, smaller on request)
  • Analog or digital (RS232/RS485) output
  • High pressure rating 1000 bar (15000 psi), higher on request
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Liquid Mass Flow Meters for Ultra Low Flow Rates

Bronkhorst® model LM02 Liquid Flow Meters (LFMs) are suited for precise measurement of flow ranges from 1,5...75 mg/h (0,025...1,25 μl/min) up to 12...600 mg/h, based on water. The microfluidic instruments can be applied for high pressure applications up to 1000 bar (higher on request). The LFM consists of a straight duplex steel sensor tube (W1.4462) with an internal volume of less than 1 mm3 which operates on the thermal measuring principle.

Due to its high pressure rating (up to 1000 bar; higher on request) the LIQUI-FLOW™ mini flowmeter is suited to HPLC systems. The instrument is equipped with a microprocessor-based printed circuit board, offering high accuracy and excellent temperature stability. The RJ45 connection is used for power supply and for both analog and digital (RS232/RS485) communication.

Technical specifications

Measurement system
Flow range, based on H2O
(intermediate ranges available)
min. 1,5...75 mg/h (0,025...1,25 μl/min)
max. 12...600 mg/h
Accuracy (incl. linearity)
(based on actual calibration)
±2% FS
Turndown 1:50 (2...100%)
Repeatability < 0,2% FS (typical H2O)
Response time (t63%) 0,4 sec.
Viscosity 0,1...100 cP
Operating temperature 5…50°C
Temperature sensitivity 0,1% RD/°C + 0,15 mg/h/°C
Attitude sensitivity (at 90°) < ± 3 mg/h
Warm-up time (approx.) 2 min for accuracy ± 2% FS
Mechanical parts
Material (wetted parts) Duplex steel W1.4462
Pressure rating 1000 bar abs
Process connections none (10-32 UNF Female);
option: 1/16” OD (PEEK or SS316)
Seals Metal
Ingress protection (housing) IP40
Electrical properties
Power supply +15…24 Vdc +/-10%
Max. power consumption 1 W
Analog output 0...5 (10) Vdc or 0 (4)...20 mA (sourcing output)
Digital communication RS232 or RS485 (Modbus RTU/ASCII or FLOW-BUS)
Electrical connection RJ45 modular jack

Technical specifications subject to change without notice.

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


LIQUI-FLOW mini LM02 brochure

LIQUI-FLOW mini - Manual
LIQUI-FLOW mini - Quick Installation Guide

Hook-up diagrams
Analog IO - RS232