Page 1
Technical Information
Turbimax CUE25 / CUE26
Handheld turbidimeter for field measurement
Application
Turbimax CUE25 / CUE26 are compact handheld meters for
the measurement of turbidity in the field. They are suitable for
the following fields of application
• Drinking water
•Process water
•Wastewater
TI397C/07/en/07.06
71001156
Your benefits
• Rugged carrying case containing everything needed
– battery pack
– calibration standards
– manual
• Waterproof case provides use in any wet environment
• Versions with white light source and infrared light source
available
• Auto ranging 0.01 to 1100 NTU / FNU
• Simple calibration procedures
• Reusable calibration standards
• Long-life batteries
Page 2
Function and system design
Measuring principle Turbidity measurement
For turbidity measurement a light beam is sent through the medium and is diverted from its original direction
by optically denser particels, e.g. solid matter particles.
Measuring methods 90° WL scattered light method
The measurement uses the standardised 90° scattered light method acc. to U.S. EPA 180.1.
The turbidity of the medium is determined by the amount of scattered light. The transmitted white light beam
is scattered by the solid matter particles in the medium. The scattered beams are detected by scattered light
receivers which are arranged at an angle of 90° to the white light source.
90° NIR scattered light method
The measurement uses the standardized 90° scattered light method acc. to ISO 7027 / EN 27027.
The turbidity of the medium is determined by the amount of scattered light. The transmitted light beam with
a wavelength in the near-infrared range is scattered by the solid matter particles in the medium. The scattered
beams are detected by scattered light receivers which are arranged at an angle of 90° to the infrared light
source.
Turbimax CUE25 / CUE26
90° scattered light method
Functions IR or white light measurement
The Turbimax is available as infrared version, CUE25, to meet the design criteria specified in ISO 7027 and
DIN 27027. The white light version, CUE26, meets the design criteria on turbidity measurement specified by
the US EPA 180.1. Both versions have long life lamps.
Auto ranging 0.01 to 1100 NTU
Turbimax CUE25/26 senses the turbidity level of a sample and automatically adjusts to the appropriate
measuring range.
Simple calibration procedures
Calibration initiated with the push of a button ensures accurate readings.
Reusable calibration standards
The calibration standards allow quick and easy calibration across all ranges without the need to mix Formazin.
The standards have a minimum shelf life of 12 months.
a0004442
2 Endress+Hauser
Page 3
Turbimax CUE25 / CUE26
Measuring system The measuring system comprises:
• Turbimax CUE25 / CUE26 turbidimeter
• Sample cuvette with light shield cap
• Indexing ring
1
2
3
v
4
Turbimax CUE25 system (example)
Black light shield
1
Indexing ring
2
Sample cuvette
3
Input
Measured variables Turbidity
Measuring range 0.01 to 1100 NTU/FNU
Power supply
Batteries 4 AAA alkaline batteries
(over 5000 tests)
Supply voltage 4 x 1.5 V
4
5
6
6
Optical well
Display
Touch pad
5
a0004364
Performance characteristic
Response time < 14 s
Reference temperature 25 °C (77 °F)
Resolution 0.01 NTU below 100 NTU
0.1 NTU in the range 100.0 to 999.9 NTU
1.0 NTU in the range 1000 to 1100 NTU
Maximum measured error
Repeatability ±2 % of reading
Endress+Hauser 3
0 to 500 NTU: ±2 % of reading or 0.01 NTU
500 to 1100 NTU: ±3 % of reading
Page 4
Environment
Ingress protection IP 67 / NEMA 4x
Insulation rating Pollution degree 2
Relative humidity max. 90%, non-condensing
Process
Process temperature 0 to 50 °C / 32 to 122 °F
Medium temperature range 0 to 50 °C / 32 to 122 °F
Sample size 10 to 15 ml
Turbimax CUE25 / CUE26
Mechanical construction
Dimensions
Weight 1.2 kg (2.7 lbs.)
Materials
Light source
Instrument:
H x W x L: 48 x 70 x 165 mm (1.875" x 2.75" x 6.50")
Instrument in carry case
H x W x L: 63 x 250 x 216 mm (2.50" x 10" x 8.50")
Instrument housing: ABS, injection molded
Sample cuvette: Borosilicate glass
Carry case: High density polyethylene blow molded
Turbimax CUE25: Infrared LED, 860 nm
Turbimax CUE26: Tungsten lamp, ~600 nm, 2250 °K
4 Endress+Hauser
Page 5
Turbimax CUE25 / CUE26
E
Operating elements
Human interface
1
3
Display
2
CAL
Operating elements
1 key used to turn the Turbimax on or off
2
V W keys used to set numerical values and to scroll through the list
3
F key used to index a sample when pressed and held and to start a reading or calibration when released
4
Ï key used to enter or exit calibration mode
12
CAL
ERR
8.8.8.8
4
Display
1 Icon indicating calibration mode
2 Icon indicating error conditions
3 Icon indicating low battery
4 Display of turbidity levels and user guidance in calibration routine
3
NTU
FNU
4
a0003588
a0003589
Certificates and approvals
4 symbol Declaration of conformity
The product meets the legal requirements of the harmonized European standards.
The manufacturer confirms compliance with the standards by affixing the 4 symbol.
EMC compatibility Interference emission and interference immunity complies with EN 61326: 1997 / A1: 1998
Endress+Hauser 5
Page 6
Ordering information
Turbimax CUE25 / CUE26
CUE25 handheld, infrared
CUE25- complete order code
CUE26 handheld, white light
CUE26- complete order code
Scope of delivery The scope of delivery comprises:
• 1 Turbimax CUE25 /CUE26 turbidimeter with 4 AAA alkaline batteries
• 1 Calibration kit CUE25 / CUE26 including
– 0.02 NTU standard
– 10.0 NTU standard
– 1000 NTU standard
• 2 Empty cuvettes and Kimwipes
• 1 Operating Instructions BA397C/07/en
• 1 Instruction card
Version
AStandard
Version
AStandard
®
Accessories
Calibration standards Calibration kit CUE25 / CUE26, full range
• 0.02 NTU
• 10.0 NTU
• 1000 NTU
Order no.: 51518582
Cuvettes • Sample cuvettes CUE25 / CUE26
incl. caps, 3 pcs.
Order no.: 51518583
6 Endress+Hauser
Page 7
Turbimax CUE25 / CUE26
Endress+Hauser 7
Page 8
TI397C/07/en/07.06
71001156
Printed in Germany / FM+SGML 6.0 / DT
Loading...