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
Endress+Hauser 3
Function and system design
1
2
3
4
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).
4 Endress+Hauser
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
Endress+Hauser 5
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
6 Endress+Hauser
Connect the sensor to the CM44 transmitter for operation.
‣
Turbimax CUS50D
GN
YE
GY
PK
M12
85 86
85
2DS
1
2
86
97 88 8798
97 88 8798
Sensor 1
Sensor 2
PK
GY
GN
YE
Sensor
85 86
85
1
2
86
97 88 8798
Sensor 1
PK
GY
GN
YE
BN
WH
Sensor
A0036365
4 Connection options
The following connection options are available:
• via M12 connector (version: fixed cable, M12 connector)
• via sensor cable to the plug-in terminals of a sensor input on the transmitter (version: fixed cable,
end sleeves)
A0033092
5 Sensor connection to sensor input (left) or via M12 connector (right)
Endress+Hauser 7
Connecting the cable shield
1
2
3
4
Cable sample (does not necessarily correspond to the original cable supplied)
Turbimax CUS50D
6 Terminated cable
1 Outer shield (exposed)
2 Cable cores with ferrules
3 Cable sheath (insulation)
7 Inserting the cable
4 Grounding clip
The maximum cable length is 100 m (328.1 ft).
8 Tightening the screw
(2 Nm (1.5 lbf ft))
The cable shield is grounded by the
grounding clip
8 Endress+Hauser
Turbimax CUS50D
Performance characteristics
Reference operating conditions
Maximum measured error
Repeatability
20 °C (68 °F), 1013 hPa (15 psi)
Absorption 0.5 % of the upper range value (corresponds to ± 50 mOD)
Formazine 10 % of the measured value or 10 FAU (the greater value applies in each case)
Kaolin 5 % of the upper range value; applies to sensors that are calibrated for the observed
measuring range
Sludge/auto
sludge
Product loss Not specified; very much depends on the condition of the measuring medium used
10 % of the measured value or 5 % of the upper range value (the greater value applies in
each case); applies to sensors that are calibrated for the observed measuring range
For solids, the achievable measured errors depend very much on the media that are actually
present and may differ from the specified values. Extremely inhomogeneous media cause the
measured value to fluctuate and increase the measured error.
The measured error encompasses all inaccuracies of the measuring chain (sensor and
transmitter). However, it does not include the inaccuracy of the reference material used for
calibration.
Application Repeatability
Absorption 0.001 OD or 0.2% of measured value (the greater value applies in each case)
Formazine 10 FAU for 800 FAU
Drift
Detection limits
For kaolin, sludge/autosludge and product loss, the repeatability depends very much on the
media that are actually present. It is therefore not possible to specify general values.
Working on the basis of electronic controls, the sensor is largely free of drifts.
• Formazine: drift 0.04% per day (for 2000 FAU)
• Absorption: drift 0.015% per day (for 5 OD)
Application Detection limit
Absorption 0.004 OD for 0.5 OD
Formazine 10 FAU
For kaolin, sludge/autosludge and product loss, the detection limit depends very much on the
media that are actually present. It is therefore not possible to specify general values.
Endress+Hauser 9
Installation
41
5
2
3
Detail A
Detail A
90°
5
3
2
1
Orientation Orientation in pipes
9 Permitted and unacceptable orientations in pipes
Turbimax CUS50D
A0029259
• The pipeline diameter must be at least 50 mm (2 in).
• Install the sensor in places with consistent flow conditions.
• The best installation location is in the ascending pipe (item 1).
A0036370
10 Direction of flow
Align the sensor in such a way that the medium flows through the measuring gap (self-cleaning
‣
effect).
The arrow indicates the flow direction; it runs from the 10 mm (0.39 in) path to the 5 mm (0.2 in)
path.
Installation marking
11 Installation marking for sensor alignment
1 Installation marking
The installation marking on the sensor is opposite the optical system.
Using the installation marking, align the sensor against the flow direction.
‣
A0041341
10 Endress+Hauser
Turbimax CUS50D
2
Installation options
Installation options:
• With flow assembly e.g. Flowfit CUA252 or CUA120
• with retractable assembly, e.g. Cleanfit CUA451
• with assembly e.g. Flexdip CYA112 and holder e.g. Flexdip CYH112
The installation angle is 90°.
The arrow indicates the flow direction; it runs from
the 10 mm (0.39 in) path to the 5 mm (0.2 in)
path.
A0036835
12 Installing with CUA120 flow assembly
Endress+Hauser 11
A0036837
2
13 Installing with CUA252 flow assembly
Turbimax CUS50D
The installation angle is 90°.
The arrow indicates the flow direction; it runs from
the 10 mm (0.39 in) path to the 5 mm (0.2 in)
path.
The installation angle is 90°.
The arrow indicates the flow direction; it runs from
the 10 mm (0.39 in) path to the 5 mm (0.2 in)
path.
A0036836
14 Installing with CUA262 flow assembly
A0041336
15 Installing with CYA251 flow assembly
The installation angle is 90°.
The arrow indicates the flow direction; it runs from
the 10 mm (0.39 in) path to the 5 mm (0.2 in)
path.
The installation angle is 90°.
The arrow indicates the flow direction; it runs
from the 10 mm (0.39 in) path to the
5 mm (0.2 in) path.
The medium pressure may not exceed
2 bar (29 psi) for manual assembly retraction.
A0036838
16 Installing with CUA451 retractable assembly
12 Endress+Hauser
Turbimax CUS50D
The installation angle is 0°.
The arrow indicates the flow direction; it runs from
the 10 mm (0.39 in) path to the 5 mm (0.2 in)
path.
If the sensor is used in open basins, install the
sensor in such a way that air bubbles cannot
accumulate on it.
A0036839
17 Installing with immersion assembly
Compressed air cleaning
Fit the compressed air cleaning unit onto the sensor head to the end stop. The nozzle of the
‣
compressed air cleaning unit must be located on the side of the wider 10 mm (0.4 in)
measurement gap.
Ambient temperature range
Storage temperature
Degree of protection
Electromagnetic compatibility (EMC)
Process temperature range
Process pressure range
Minimum flow
Environment
–20 to 60 °C (–4 to 140 °F)
–20 to 70 °C (–4 to 158 °F)
IP 68 (1.8 m (5.91 ft) water column over 20 days, 1 mol/l KCl)
Interference emission and interference immunity as per
• EN 61326-1:2013
• EN 61326-2-3:2013
• NAMUR NE21: 2012
Process
–20 to 85 °C (–4 to 185 °F)
0.5 to 4.5 bar (7.3 to 65.3 psi) absolute
No minimum flow required.
For solids which have a tendency to form deposits, ensure that sufficient mixing is performed.
Endress+Hauser 13
Dimensions
82.7 (3.26)
12.6
20.5
(0.8)
292.2 (11.5)
!40
(1.57)
209.5 (8.25)
24.5 (1)
NPT3/4"
GI“
36 (1.4)
(0.5)
13.4
(0.53)
82.7 (3.26)
12.6
20.5
(0.8)
292.2 (11.5)
!40
(1.57)
209.5 (8.25)
24.5 (1)
NPT3/4"
GI“
36 (1.4)
(0.5)
13.4
(0.53)
85.9 (3.38)
! 64
(2.52)
Turbimax CUS50D
Mechanical construction
A0036366
18 Dimensions. Dimensions: mm (in)
19 Dimensions with clamp. Dimensions: mm (in)
14 Endress+Hauser
A0036582
Turbimax CUS50D
61 (2.4)
64.5 (2.5)
36.9 (1.5)
4.7 (0.19)
3.8 (1.5)
Ø 40 (1.6)
Weight
Materials
Process connections
20 Dimensions for compressed air cleaning. Dimensions: mm (in)
Compressed air cleaning: 2 bar (29 psi) maximum pressure
Cable length Plastic sensor Metal sensor Metal sensor with clamp
3 m (9.84 ft) 0.46 kg (1.5 lbs) 1.15 kg (2.54 lbs) 1.21 kg (2.67 lbs)
7 m (23 ft) 0.68 kg (1.5 lbs) 1.37 kg (3.81 lbs) 1.43 kg (3.15 lbs)
15 m (49.2 ft) 1.15 kg (2.54 lbs) 1.83 kg (4.03 lbs) 1.9 Kg (4.19 lbs)
Plastic sensor Metal sensor
Sensor head: PCTFE PCTFE
Sensor housing: PPS/GF40% 1.4571/AISI 316Ti
Sensor threaded connection: PPS/GF40% 1.4404/AISI316L
O-rings: EPDM EPDM
The data refer to the wetted materials when the sensor is installed correctly in Endress+Hauser
assemblies.
• G1 and NPT ¾'
• Clamp 2" (depending on sensor version)/DIN 32676
A0036826
Endress+Hauser 15
Certificates and approvals
Turbimax CUS50D
mark
Electromagnetic compatibility
ISO 7027
EAC
Marine approvals
The product meets the requirements of the harmonized European standards. As such, it complies
with the legal specifications of the EU directives. The manufacturer confirms successful testing of the
product by affixing to it the mark.
Interference emission and interference immunity as per
• EN 61326-1:2013
• EN 61326-2-3:2013
• NAMUR NE21: 2012
The measuring method used in the sensor corresponds to the turbidimetric method (principle of
attenuation of light) according to ISO 7027-1:2016.
The product has been certified according to guidelines TP TC 004/2011 and TP TC 020/2011 which
apply in the European Economic Area (EEA). The EAC conformity mark is affixed to the product.
A selection of sensors have type approval for marine applications, issued by the following
classification societies: ABS (American Bureau of Shipping), BV (Bureau Veritas), DNV-GL (Det
Norske Veritas-Germanischer Lloyd) and LR (Lloyd’s Register). Details of the order codes of the
approved sensors, and the installation and ambient conditions, are provided in the relevant
certificates for marine applications on the product page on the Internet.
Ordering information
Product Configurator
Scope of delivery
On the product page there is a Configure button to the right of the product image.
1. Click this button.
The Configurator opens in a separate window.
2. Select all the options to configure the device in line with your requirements.
In this way, you receive a valid and complete order code for the device.
3. Export the order code as a PDF or Excel file. To do so, click the appropriate button on the right
above the selection window.
For many products you also have the option of downloading CAD or 2D drawings of the
selected product version. Click the CAD tab for this and select the desired file type using
picklists.
The delivery comprises:
• 1 Turbimax CUS50D sensor, version as ordered
• 1 Operating Instructions BA01846C
Accessories
The following are the most important accessories available at the time this documentation was
issued.
For accessories not listed here, please contact your Service or Sales Center.
‣
Assemblies
FlowFit CUA120
• Flange adapter for mounting turbidity sensors
• Product Configurator on the product page: www.endress.com/cua120
Technical Information TI096C
16 Endress+Hauser
Turbimax CUS50D
Ø 53 (2.09)
30 (1.18)
36 (1.42)
Ø 64 (2.52)
Flowfit CUA252
• Flow assembly
• Product Configurator on the product page: www.endress.com/cua252
Technical Information TI01139C
Flowfit CUA262
• Weld-in flow assembly
• Product Configurator on the product page: www.endress.com/cua262
Technical Information TI01152C
Flexdip CYA112
• Immersion assembly for water and wastewater
• Modular assembly system for sensors in open basins, channels and tanks
• Material: PVC or stainless steel
• Product Configurator on the product page: www.endress.com/cya112
Technical Information TI00432C
Cleanfit CUA451
• Manual retractable assembly made of stainless steel with ball valve shut-off for turbidity sensors
• Product Configurator on the product page: www.endress.com/cua451
Technical Information TI00369C
Holder
Mounting material
Flowfit CYA251
• Connection: See product structure
• Material: PVC-U
• Product Configurator on the product page: www.endress.com/cya251
Technical Information TI00495C
Flexdip CYH112
• Modular holder system for sensors and assemblies in open basins, channels and tanks
• For Flexdip CYA112 water and wastewater assemblies
• Can be affixed anywhere: on the ground, on the coping stone, on the wall or directly onto railings.
• Stainless steel version
• Product Configurator on the product page: www.endress.com/cyh112
Technical Information TI00430C
Weld-in adapter for clamp connection DN 50
• Material: 1.4404 (AISI 316 L)
• Wall thickness 1.5 mm (0.06 in)
• Order number: 71242201
21 Weld-in adapter. Dimensions: mm (in)
A0030841
Endress+Hauser 17
60 ... 64
(2.36 ... 2.52)
> 100 (3.94)
36
(1.42)
22 Pipe connection with weld-in adapter. Dimensions: mm (in)
Turbimax CUS50D
A0030819
Compressed air cleaning
Calibration kit
Compressed air cleaning for CUS50D
• Connection: 6 mm (0.24 in)
• Pressure: 1.5 to 2 bar (21.8 to 29 psi)
• Materials: POM, PE, PA 6.6 30% glass fiber
• Order number: 71395617
Compressor
• For compressed air cleaning
• 230 V AC, order number: 71072583
• 115 V AC, order number: 71194623
CUS50D kit, solid state reference
• Calibration tool for CUS50D turbidity sensor
• Easy and reliable inspection of CUS50D turbidity sensors
• Order number: 71400898
18 Endress+Hauser
www.addresses.endress.com
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