Brix and Concentration measurement LB 565

Microwave measurement systems for installation in tanks and pipelines

Brix and concentration measurement MicroPolar Brix is specifically designed for the sugar industry. It provides online measurement of

  • Dry substance
  • °Brix value
  • Density
  • Concentration

The real-time measuring results are essential in order to optimize and control the sugar quality and moreover to ensure an efficient production process. In more than thousand applications worldwide, the microwave analyzer MicroPolar Brix has proven to work absolutely reliable and accurate.

MicroPolar Brix is available with different sensor types for the installation on vessels (e.g. crystallizer) or pipelines. The high-dynamic version of the brix and concentration measurement MicroPolar++ provides an excellent measuring accuracy, even for large pipeline diameters.

Our Brix and concentration measurement - your advantages at a glance


  • Optimization of your processes by monitoring the dry matter content
  • Process reliability through online measured value
  • Representative and reliable measurement using the transmission method
  • User-friendly and intuitive operation
  • Simple on-site calibration

New container probes for microwave moisture measurement

The new, removable plastic caps made of PEEK with internal thread can be exchanged on site if necessary. The newly developed antenna technology inside ensures higher measurement accuracy and offers more dynamics.

New FlowCell with EHEDG certification

The new FlowCell consists of a stainless steel inline housing and two microwave antennas which are connected via clamp connections and are interchangeable at any time. Due to the certification of the EHEDG it is also suitable for hygienic applications.

Our applications/solutions for Brix and concentration measurement

Measuring °Brix in the evaporation
Measuring °Brix in the

Measuring density of milk of lime in the purification process




Multi-frequency Technology

The measurement is performed with a number of different frequencies per measurement cycle, leading to a very stable and reliable measurement, unaffected by reflexes or resonances.

High Dynamics

The high dynamic range of microwave analyzer MicroPolar allows the precise measurement on even very large pipeline diameters.

Reference Line

An integrated reference line makes the measurement independent from potential environmental influences.

Automatic on-site Calibration

The calibration is done directly on the evaluation unit. The software contains a sample taking feature, where laboratory values can be easily entered. The calibration curve is calculated automatically.

System Configuration

Microwave sensors:

Batch Pan Probe





  Continuous Pan Probe with flushing device




New FlowCell with EHEDG certification

       available for DN 50...150




 Technical Data Micro-Polar Brix LB 565


Operating frequency2,4 -2,5 GHz (ISM-Band), depending on local regulations
Transmission powerMicroPolar Brix: <0,1 mW (<-10 dBm)
MicroPolar Brix ++: <10 mW (<10 dBm)
HousingWall housing made of stainless steel
MicroPolar Brix: HxWxD: 300 x 323 x 140 mm
MicroPolar Brix ++: HxWxD: 400 x 338 x 170 mm
Protection typeIP65

MicroPolar Brix: about 6,5 kg
MicroPolar Brix ++: about 8,0 kg

Ambient conditions
during operation
-20 ... +60 °C (-4 ... 140 °F), no condensation
Relative humidity: max. 80 %
Altitude: max. 2000m

Ambient conditions
during storage

-20 ... +70 °C (-4 ... 158 °F), no condensation
Relative humidity: max. 80 %
Achievable accuracy≤0,2 weight % (standard deviation)
depending on product and sensor
DisplayDor matrix LC display, 114 mm x 64 mm, 240 x 128 pixels
with back-lighting, automatic contrast setting

Freely accessible foil keypad, light-stable and weatherproof:
alphanumeric keyboard and 4 softkeys (software-assigned buttons)

Power supplyFor MicroPolar Brix, depending on device type:
1.) 100 ... 240 V AC, 45 ... 65 Hz
2.) 24 V DC: 18 ... 36 V;
     24 V AC: -20%, +5%, 40 ... 440 Hz
For MicroPolar Brix ++, depending on device type:
1.) 100 ... 240 V AC, 45 ... 65 Hz
2.) 24 V DC: 18 ... 36 V, no reverse polarity protection
Power consumptionFor MicroPolar Brix: max. 30 VA (AC/DC), depending on configuration
For MicroPolar Brix ++: max. (48/60) VA (AC/DC), depending on configuration
FusesFor MicroPolar Brix: 2 x 2.0 A / slow-blow
For MicroPolar Brix ++: 2 x 2.0 A / slow-blow
at 100 ... 240 V AC or 2 x 6.3 A / slow-blow at 24 V DC
Battery type3 V Lithium button cell, type CR2032
Measured valuee.g. concentration, dry content
Inputs and outputs 
Cable cross-sectionmin. 1,0 mm2 (mains supply)
Cable feed-through

2 x M20x1.5 for cable 5 ...14 mm (depending on application)
4 x M16x1.5 for cable 5 ... 8 mm (depending on application)

Sensor connectionInputs and outputs for signal and reference channel, 50 Ω N-socket
HF cableCable lengths: 2,4,6 and 10 m; 50 Ω; both sides with 4 N connectors
Current input2 x current input 0/4 ... 20 mA, ohmic resistance 50 Ω, 1x insulated,
1x instrument ground
e.g. for temperature compensation
Current output

Current output 1: 4...20 mA, ohmic resistance max. 800 Ω, insulated
Current output 2: 0/4...20 mA, ohmic resistance max. 800 Ω, insulated
e.g. for result or temperature output

PT100 connectionMeasuring range: -50 ... +200 °C (-58 ... 392 °F)
measurement tolerance: <0.4 °C
Digital input3 x digital input
Relay outputs2 x relays (SPDT), insulated
Serial interfaces

RS232 on the bottom side
RS485 via terminal strip
Data format: 38400 Bd, no handshake
8 data bits, 1 stop bit, no parity

Container Probe 
MaterialPlastic caps made from PEEK, stainless steel
PT100 connection cable: Silicon / Teflon
Process couplingFlange according to DIN EN 1092 Typ 05
DN 65 / PN 6, DN 80, 100, 150 / PN 16;
ASA flange 2,5"/150 PSI
(More on request)
Connections4 x HF connections: N female, 50 Ω
for HF cable with max. 10 m length
Designintegrated reference path
Variantswithout flushing: with PT100 with flushing:
2 x 3/8" female thread (DIN ISO 228-1)
Temperature rangeProduct temperature: 10...120 °C (50 ... 248 °F)
Ambient temperature: -20...60 °C (-4 ... 140 °F)
Storage temperature: 10...80 °C ( 50 ... 176 °F)
Process pressureUp to 16 bar, depending on model
Material housingstainless steel 1.4404 polished (AISI 316L)
Material antenna
Sealing materialsEPDM
Process connectionStandard welding flange acc. to EN 1092-1/11
Hygiene: Thread/collar with nut according to DIN 11853-1
weld stubs
Nominal pipe sizesDN 50 bis DN 150
Nominal pressure levelPN 16
Temperature rangeProduct temperature: 10...130°C, temporarily up to 140°C
Ambient temperature (operation and storage): -20 ... 60 °C
Connections2 x HF connections, max. cable lagth: 10 m
EHEDG, EG 1935/2004 (hygienic variant)


Application Report
Format Size
Brix and Concentration Measurements for continuous vacuum pans en PDF 323.57 KB
Concentration Measurement for milk of lime en PDF 275.59 KB
Format Size
Flyer FlowCell en PDF 697.31 KB
Flyer FlowCell French language en PDF 481.22 KB
LB 565 MicroPolar Brix en PDF 2.77 MB
Measuring Moisture of Pressed Pulp en PDF 1.61 MB
Soluciones para Industria Azucarera Spanish language en PDF 2.16 MB
Soluções para Indústrias de Açúcar Portuguese language en PDF 1.95 MB
Solutions for the Sugar Industry de, en PDF 2.44 MB
Operation Manual
Format Size
LB 565 Start-up Crystallization en PDF 541.92 KB
LB 565 MicroPolar Brix (++) en PDF 15.61 MB
Press & Media
Format Size
Use of Microwave in Sugar Industry for process control de, en PDF 1.89 MB
Microwave measuring technology for the sugar industry en PDF 1.79 MB
Uso de las microondas en el control de procesos del azúcar Spanish language en PDF 470.42 KB
Project Questionnaire
Format Size
Project Questionnaire Microwave en PDF 124.43 KB
Software Tool
Format Size
LB 565 MicroPolar Brix de, en ZIP 568.19 KB
Technical Information
Format Size
LB 565 MicroPolar Brix de, en PDF 8.82 MB
TI 565 DN65 en PDF 145.93 KB
TI 565 DN65 with Container Flush Probe en PDF 145.7 KB
TI 565 DN80-150 en PDF 147.21 KB
TI 565 DN80-150 mit Spülvorrichtung en PDF 147.94 KB