1. Process and Laboratory Moisture and Density Measuring
Innovative Microwave Resonance Technology
Process and Laboratory Moisture and Density Measuring
In the Sugar industry

2. 41 years of TEWS Elektronik
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Measuring
instruments
Applications
Service
Research and Development, Production and Sales
41 years of TEWS Elektronik
TEWS ELEKTRONIK GMBH & CO. KG
41 years of industrial experience
22 years of experience in microwave resonance technology for moisture and
density measurement
3500 systems employed for 600 customers
Approximately 50% of the equipment are installed and maintained overseas
50 employees in research, development and production
Sales and service throughout the world
Made in Germany

3. Moisture Measuring Procedures
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Physics and Methods
Moisture Measuring Procedures

4. Why measure the Water Content?
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Moisture Measuring for Quality Assurance and Process Control
Why measure the Water Content?
Water content as cost factor (valuable product, cheap water)
Optimization of process steps (e.g. time and energy during drying)
Mechanical processability (e.g. stability, proportioning)
Product shelf life (e.g. moldiness, chemical reactions)
Safety (e.g. risk of explosion, spontaneous combustion)
Legal and contract conditions
>> require reliable, accurate and fast moisture measuring

5. Hours Minutes Seconds Milliseconds
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Direct and Indirect Methods
Industrial Moisture Measuring Procedures
Hours Minutes Seconds Milliseconds
Accuracy
Karl Fischer
titration
Microwave
resonance
Near
infrared
(NIR)
Drying kiln,
LOD balance
Capacity,
conductivity

6. Microwave measuring equipment
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Construction and Components
Microwave Resonance Measuring System
Display
Microwave measuring equipment
Inter-
face
Micro-controller,
software
Microwave generator,
Microwave detector
LAN, bus, etc.
PLC
Microwave
sensor

7. The Microwave Resonance Technique
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Electromagnetic Field Measurement
Interactions between Water and Microwaves H+
Low-powered microwave field
Selective interactions between field and polar water molecules
Resonance is sensor-specific
Water molecules in the product change the resonance frequence and amplitude
Measurements of moisture and density or mass
O2- H+
Amplitude
The Microwave Resonance Technique
Frequency

8. Forms of Microwave Resonators
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Adjusted to Product and Application
Forms of Microwave Resonators
Planar sensors
Powder
Granules
Pellets
Fibers
Boards
Tubular sensors
Powder
Granules
Pellets
Fibers (atline)
Fork sensors
Foils
Strips
Sheets
Fleece
Paper

9. Characteristics of the Microwave Resonance Method
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For High-quality Industrial Application
Characteristics of the Microwave Resonance Method
High accuracy
High speed
Surface and core moisture
- Independent of density,
color, surface structure
- Direct measurement
in product flow
- Online capacity
Microwave
resonance
method
Simple service
- Free of wear and tear, low-maintenance
- No sample preparation,
non-destructive

10. Measuring Instruments to meet your Demands
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TEWS Elektronik Blueline ®
Measuring Instruments to meet your Demands

11. The Instrument Program
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TEWS Elektronik Blueline ®
The Instrument Program
Special
solutions
Measuring rate
1/sec
100/sec
10,000/sec
MW 30X1
Process
facilities
MW 4420
Laboratory/
atline instruments
MW 4260, MW 4270
MW 4300, MW 4310
MW 1150
Handheld
instruments
MW 1100, MW 1100S

12. Online Measurement of Material Moisture & Density
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Process Instruments MW 4260 and MW 4270
Online Measurement of Material Moisture & Density
Sensors directly within the product stream
Continuous measurement transfer to process control
Special implementations and ATEX protection are possible

13. Quality Assurance in the Laboratory
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Moisture Measuring Instruments MW 4300 and MW 4310
Quality Assurance in the Laboratory
For high-quality laboratory measurements of moisture / density
Many configuration, calibration and data analysis options
Sensors for sample volumes of 1 ml – 2000 ml are available

14. Atline routine Measurements
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Moisture Measuring Instrument MW 1150
Atline routine Measurements
For frequent routine measurements accompanying production
Configuration, calibration and data analysis related to applications
Equipment for sample volumes of 1 ml – 2000 ml are available

15. Transportable, precise, applicable in a Variety of Ways
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Handheld Instruments MW 1100 and MW 1100S
Transportable, precise, applicable in a Variety of Ways
Measuring by pressing on bulk material or insertion in bales, etc.
Storage of measurements and data exchange via USB
Application under industrial conditions

16. Display, Analysis, Documentation
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Software TEWS Moisture View TMV ©
Display, Analysis, Documentation
Simple operation, configuration and calibration of the measuring instruments
Statistics and graphics functions for the measured data analysis
Integrated software for all applications

17. Moisture Measuring at Production Facilities
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Typical Measuring Sites
Moisture Measuring at Production Facilities
Laboratory

18. block above conveyor belt
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As Diverse as the Demands
Sensor Installation at Process Facilities
Sliding
block above conveyor belt
Conveyor
transfer point
Vibro
conveyor
Fork sensor on
production line

19. Measuring next to conveyor belt Exposition on Process Installations
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As Diverse as the Demands
Sensor Installation at Process Facilities
Drop shaft,
silo, chute
Bypass
Measuring next to conveyor belt
Mobile
instruments
Exposition on Process Installations

20. Sugar, Melasse, Fondant Industrial Applications Enterprise Measuring
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Measuring
instruments
Applications
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Industrial Applications
Sugar, Melasse, Fondant

21. Sugar and Biofuel Industrie
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Accurate and Fast Measuring Saves Time and Money
Sugar and Biofuel Industrie
Microwave measuring is rarely influenced by natural variation of sizes, color, mineral content
Detection of surface and core moisture
APPLICATION EXAMPLES
Sugar Substitutes
Refined Sugar
Lactose
Fondant
0,8 – 3,5 %
0,02 – 0,5%
0 – 0,6 %
11 – 16 %

22. Moisture calibration:
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Measuring and Calibration Example
Chrystal Sugar
Moisture range: approx %– 0.45 %
Temperature: 15 °C – 50 °C
Sensors: Tube sensor H  
Measuring results:   
Moisture calibration:
The calibration adjusted on initial commissioning is stable, it was checked repeatedly and confirmed.
Number of samples: 16
Mean deviation:+/ %

23. Qualified Support Our Service Enterprise Measuring procedure Measuring
instruments
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Our Service
Qualified Support

24. Enterprise
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Measuring
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Our Service
Qualified Support
Project support from initial consultation to commissioning
After sales service
Support for customers throughout the world in many languages
OVERVIEW OF SERVICE
Application laboratory for test measurements
Customer-specific solutions
Qualified maintenance and instructions to users
Application-specific calibration
Support provided by engineers via telephone and modem
Upgrading service

25. Representing TEWS Elektronik international
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Service and Sales
Representing TEWS Elektronik international

26. TEWS Elektronik – your competent Partner
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Enterprise and Technology
TEWS Elektronik – your competent Partner
TEWS Elektronik
The specialist for microwave resonance measuring
20 years of experience in material moisture and density measurement
Research and development, production, sales and service
Customer-specific solutions in many branches throughout the world
Microwave resonance measuring
High accuracy
High measuring speed
Easy to operate

27. Thank you very much for your Interest!
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TEWS Elektronik – Industrial Moisture and Density Measuring Technology
Thank you very much for your Interest!
TEWS Elektronik GmbH & Co. KG
Sperberhorst 10
22459 Hamburg
Germany
Phone
Fax

28. Exposition on Microwave Resonance Procedures
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Process and Laboratory Moisture and Density Measuring
Exposition on Microwave Resonance Procedures
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29. Dual-Parameter Measurement
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Exposition on Microwave Resonance Procedures
Dual-Parameter Measurement
Sensor
Resonator
Product
GEN
Display
CPU
Keyboard
DET
Interfaces
Processor
Generator/Detector
Product/Sensor
Generator control
Detector read-out
Moisture and density calculation
Peripheral connection (e.g. PC)
Microwave generation in the gigahertz range
Sensor input
Microwaves changed by the product are received
Transmission of the measuring signal to the CPU
Build-up of a resonating microwave field
Product changes the field in the sensor
Measuring the signal by antenna at the detector
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30. Dual-Parameter Measurement
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Exposition on Microwave Resonance Procedures
Dual-Parameter Measurement
empty Sensor
Transmission
Each sensor shows a
characteristic natural
resonance in empty state.
Frequency
Back

31. Dual-Parameter Measurement
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Exposition on Microwave Resonance Procedures
Dual-Parameter Measurement
Attenuation
empty sensor
Both the resonance parameters,
namely shift displacement and
attenuation, are typical for
moisture and density of the
test sample in the sensor.
Transmission
filled sensor
Shift
Frequency
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32. Dual-Parameter Measurement
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Exposition on Microwave Resonance Procedures
Dual-Parameter Measurement
Gradual charging of the
sensor or product compaction
at constant moisture – increases the resonance shift – increases the resonance attenuation proportionately
Transmission
Frequency
Back

33. Dual-Parameter Measurement
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Exposition on Microwave Resonance Procedures
Dual-Parameter Measurement
Rising product moisture at
constant density – increases the resonance shift – increases the resonance attenuation disproportionately
Transmission
Frequency
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34. Change in amplitude (y) Shift in the resonance frequence (x)
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Exposition on Microwave Resonance Procedures
Separation of Moisture and Density
Diagram
x-axis: Frequency shift
y-axis: Change of amplitude
Different lines
Line 1: dry product
Line 2: moist product
Values on one regression line: different densities but same moisture
Angle
The "α “ angle only depends on moisture
The angle determines the MW value
The density only determines the position on the regression line
0.10
0.08
0.06
Change in amplitude (y)
Sample 2
Sample 1
0.04
0.02 α1 α2
0.00
0.0
0.2
0.4
0.6
0.8
1.0
Shift in the resonance frequence (x)
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35. Calibration Exposition on Microwave Resonance Procedures Diagram
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Exposition on Microwave Resonance Procedures
Calibration
Diagram
x-axis: Moisture reference (e.g. LOD loss on drying)
y-axis: MW-value
Regression
Calculation of a calibration line
Measuring in the application-specific moisture range
Correlation and mean deviation are calculated
Number of calibrations
Several calibrations can be stored
For up to 200 products (optional)
0.050
0.045
0.040
MW value
0.035
0.030
0.025
0.020
2.0
3.0
4.0
5.0
6.0
Moisture (%)
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36. Temperature Compensation
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Exposition on Microwave Resonance Procedures
Temperature Compensation
Increasing temperature
Makes water molecules more mobile
Increases microwave values
Temperature compensation lines
For cold samples (blue)
For hot samples (red)
Calculation
Recommended for temperature variations > 10°C
Compensation can be activated by user
0.13
0.11
Measure value
0.07
0.05
20°C
110 °C
0.03
0.0
1.0
2.0
3.0
4.0
5.0
Moisture (%)
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37. Display and Storage of Measurements (1)
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Exposition on Microwave Resonance Procedures
Display and Storage of Measurements (1)
Number
Date
Hour
Moisture
Density
Temperature 1
23:45
7,8
492
22° 2
23:50
8,1
489
23° 3
23:55
7,9
503 4
0:00
8,0
510 5
0:05
512
24°
Moisture: Density: 510 Temperature: 23°C
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38. Display and Storage of Measurements (2)
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Exposition on Microwave Resonance Procedures
Display and Storage of Measurements (2)
00:05:00
8.5
530
8.4
500
8.3
Density
470
Moisture
8.2
Density
440
Moisture
8.1
410
8.0
380
7.9
350
Moisture: 8.1% Density: 450 mg/cm3
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39. Summary: Advantages and Benefits
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Exposition on Microwave Resonance Procedures
Summary: Advantages and Benefits
Advantages
ACCURATE – due to high water selectivity
FAST – the results are available within milliseconds
INDEPENDENT – the moisture determination is independent of density, surface structure and color of the sample
FREE OF MAINTENANCE – no consumables, no aging, no wear
BENEFITS FOR THE USER
Fast amortization
Energy-saving
Optimization of production process
Increase in product quality
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40. Exposition on Process Installations
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Process and Laboratory Moisture and Density Measuring
Exposition on Process Installations
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41. Planar Sensor at a Conveyor Belt (1)
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Measuring
units
Application
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Sensor Installation at Process Facilities
Planar Sensor at a Conveyor Belt (1)
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42. Planar Sensor in a Vibro Conveyor
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Sensor Installation at Process Facilities
Planar Sensor in a Vibro Conveyor
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43. Planar Sensor in Sliding Block above Belt Conveyor (1)
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Sensor Installation at Process Facilities
Planar Sensor in Sliding Block above Belt Conveyor (1)
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44. Planar Sensor in Silo Wall
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Sensor Installation at Process Facilities
Planar Sensor in Silo Wall
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45. Tubular Sensor in Bypass
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Measuring
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Sensor Installation at Process Facilities
Tubular Sensor in Bypass
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