Endress+Hauser CUS50D Specifications
TI01395C/07/EN/04.20
71473152
2020-02-10
Products Solutions Services
Technical Information
Turbimax CUS50D
Absorption sensor for turbidity and solids measurements
Application
Turbimax CUS50D is an absorption sensor for measuring
turbidity or solids content. The sensor ensures reliable
measurements and efficient process monitoring, even in
aggressive media:
• Industrial wastewater and utilities:
• Measurement of solids content in process sludges and
wastewater sludges
• Flocculant dosing
• Measurement of concentration of dairy products in
wastewater
• Process media:
Concentration measurement in the product, e.g. in titanium
dioxide
• Highly absorptive media:
Concentration measurement in very dark media, e.g.
activated carbon concentration in the 4th treatment step of
wastewater treatment plants
[Continued from front page]
Your benefits
• Turbidity measurement according to the principle of light
attenuation as per ISO7027
• Glass-free, non-adhesive sensor head with 2 path lengths (5
mm and 10 mm)
• Standardized communication (Memosens technology)
enables "plug and play"
• Sensor head made of a PTFE derivative is easy to keep clean
using the air cleaning unit
• Long service life of sensor thanks to resistant materials used
in sensor shaft and head
• Sensor is precalibrated ex works and includes different
application models
• Automatic sludge model independently selects the optimum
signal characteristics for each type of sludge
• 1-point calibration suffices in most applications
Turbimax CUS50D
Table of contents
Function and system design ................... 4
Measuring principle ............................ 4
Measuring system ............................. 4
Sensor monitoring ............................. 5
Applications ................................. 5
Input ..................................... 6
Measured variable ............................. 6
Measuring range .............................. 6
Power supply .............................. 6
Electrical connection ........................... 6
Performance characteristics ................... 9
Reference operating conditions .................... 9
Maximum measured error ....................... 9
Repeatability ................................ 9
Drift ...................................... 9
Detection limits ............................... 9
Installation ............................... 10
Orientation ................................ 10
Environment .............................. 13
Ambient temperature range ..................... 13
Storage temperature .......................... 13
Degree of protection .......................... 13
Electromagnetic compatibility (EMC) ............... 13
Compressed air cleaning ........................ 18
Calibration kit ............................... 18
Process .................................. 13
Process temperature range ...................... 13
Process pressure range ......................... 13
Minimum flow .............................. 13
Mechanical construction .................... 14
Dimensions ................................ 14
Weight ................................... 15
Materials .................................. 15
Process connections ........................... 15
Certificates and approvals ................... 16
mark ................................... 16
Electromagnetic compatibility .................... 16
ISO 7027 .................................. 16
EAC ..................................... 16
Marine approvals ............................ 16
Ordering information ....................... 16
Product Configurator .......................... 16
Scope of delivery ............................. 16
Accessories ............................... 16
Assemblies ................................. 16
Holder .................................... 17
Mounting material ........................... 17
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Function and system design
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2
3
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Turbimax CUS50D
Measuring principle
Measuring system
The sensor operates on the principle of light attenuation and meets the requirements of turbidity
measurement according to the principle of light attenuation as per ISO 7027. The measurement is
performed with a wavelength of 860 nm.
It is suitable for measurements in the average to high turbidity range and for the measurement of
solids content.
A complete measuring system comprises:
• Turbimax CUS50D turbidity sensor
• Liquiline CM44x multi-channel transmitter
• Direct installation in a pipe connection (Clamp 2" ) or
• Assembly:
• Flow assembly e.g. Flowfit CUA252 or CUA120 or
• Assembly e.g. Flexdip CYA112 and holder e.g. Flexdip CYH112 or
• Retractable assembly, e.g. Cleanfit CUA451
A0036713
1 Measuring system with CUA252 flow assembly
1 Liquiline CM44x multi-channel transmitter
2 Turbimax CUS50D turbidity sensor
3 CUA252 flow assembly
4 Direction of flow
Sensor structure
The sensor features a sensor head with 2 path lengths of 5 mm (0.2 in) and 10 mm (0.39 in).
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Turbimax CUS50D
3
4
A
B
A0036825
2 CUS50D sensor head
1 Light sources 10 mm (0.39 in)
2 Light sources 5 mm (0.2 in)
3 Light receiver 5 mm (0.2 in)
4 Light receiver 10 mm (0.39 in)
A0036368
3 Versions
A With clamp
B With compressed air cleaning
Sensor monitoring
The optical signals are continuously monitored and analyzed for plausibility. If inconsistencies occur,
an error message is output via the transmitter. The function is disabled by default.
Applications
The "Absorption" and "Formazine" applications are calibrated at the factory. The absorption factory
calibration is used as the basis for precalibrating additional applications and optimizing them for the
different media characteristics.
Application Specified operating range
Factory calibration for absorption 0.000 to 5.000 AU or
0.000 to 10.000 OD
Factory calibration for formazine 40 to 4,000 FAU
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Turbimax CUS50D
Application Specified operating range
Application: Kaolin 0 to 60 g/l
Application: Sludge 0 to 25 g/l
Application: Auto sludge 0 to 25 g/l
Product loss 0 to 100 %
To adapt to a specific application, it is possible to perform customer calibrations with up to 10 points.
Application: Formazine
Factory calibration for the formazine application is carried out with the formazine turbidity standard.
Sensor measured values in the unit [FAU] are only comparable to the measured values of any
other sensor e.g. scattered light sensor with the unit [FNU] or [NTU] in this standard medium.
In any other medium, the measured values will be different to those obtained when measuring
with another scattered light sensor.
Input
Measured variable
Measuring range
• Turbidity
• Absorption
• Solids content
• Product loss
• Temperature
Application Specified operating range Maximum operating range
Absorption factory calibration 0.000 to 5.000 AU or
0.000 to 10.000 OD
Factory calibration for
formazine
Application: Kaolin 0 to 60 g/l 500 g/l
Application: Sludge 0 to 25 g/l 500 g/l
Application: Auto sludge 0 to 25 g/l 500 g/l
Product loss 0 to 100 % 1000%
Measuring range with solids content:
For solids, the achievable ranges depend very much on the media that are actually present and
may differ from the recommended operating ranges. Extremely inhomogeneous media may
cause fluctuations in measured values, thus narrowing the measuring range.
40 to 4,000 FAU 10000 FAU
Power supply
Electrical connection
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Connect the sensor to the CM44 transmitter for operation.
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