INDUSTRIAL STYLE LIQUID MASS FLOW METERS / CONTROLLERS - LIQUI-FLOW™ series

LIQUI-FLOW™ Industrial Style Liquid Mass Flow Meters / Controllers

Weatherproof (IP65) and Rugged Design

The LIQUI-FLOW™ series L10I/L20I digital Liquid Flow Meters / Controllers for low flow ranges are equipped with a rugged 'industrial style' (IP65) pc-board housing for use in industrial environments. The instruments 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 0,02 ... 1 kg/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.

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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)
L13I \| 5 ... 100 g/h	L13I-C2I \| 5 ... 100 g/h
L23I \| 100 ... 1000 g/h	L23I-C2I \| 100 ... 1000 g/h

Features

Fast and accurate measurement
No moving parts
Suitable for liquids with low boiling point
Attitude insensitive
Very small internal volume
In combination with a control valve: continuous and stable control
Protection class IP65
Analog I/O-signals, RS232-connection; optional on-board fieldbus interface

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 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

The industrial style liquid flow meter can be connected to an industrial style (IP65) control valve to form a closed control loop. The standard direct acting valve (model C2I) is normally closed, has a pressure capability of 100 bar (1500 psi) and a purge connection for easy elimination of air or gas.

Downloads

Brochures
LIQUI-FLOW brochure

Manuals
Manual LIQUI-FLOW incl u-FLOW
Quick Start Guide LIQUI-FLOW Industrial

Hook-up diagrams
Analog IO - RS232
DeviceNet
FLOW-BUS
Modbus RTU/ASCII
PROFIBUS DP
Industrial Ethernet (EtherCAT, EtherNet/IP, Modbus-TCP, POWERLINK, PROFINET)
CANopen
Optional Bus and IO Configurations

Certificates
ATEX: KEMA 10ATEX0111X

PN 100 bar (Mass Flow Meter)	PN 100 bar (Mass Flow Controller)
L13I \| 5 ... 100 g/h	L13I-C2I \| 5 ... 100 g/h
L23I \| 100 ... 1000 g/h	L23I-C2I \| 100 ... 1000 g/h