Turbidity

Quality Control Using Turbidity Measurements

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WTW Quality Control Using Turbidity Measurements

4 models to choose from:
2 portable models, each with either IR or tungsten light source, and 2 laboratory meters with IR or Tungsten light source:

  • Turb® 355 T/IR – Portable field meter
  • Turb® 430 IR/T – Portable field meter
  • Turb® 550/Turb® 550 IR – lab meters
  • Turb® 555/Turb® 555 IR – lab meters

Performing quality control, turbidity is an indicative parameter for many applications. Turbidity measurements are of extreme importance in quality monitoring in water, drinking water, wastewater, beverage production, electroplating and petrochemical applications.
Light passing through liquid that contains undissolved solids, such as algae, mud, microbes and other insoluble particles, is both absorbed and scattered. Turbidity increases with the amount of undissolved solids present in the sample; the shape, size and composition of the particles also influence the degree of turbidity. In the past, turbidity has been determined by simply measuring light passing through the sample. However, measuring the scattered light at an angle of 90° has proven to be a more accurate method particularly at lower measuring ranges. Instruments that use this method are also referred to as nephelometers.

 

Portable Turbidity Meters

Turb® 430 IR/Turb® 430 T – Lab accuracy & comfort in portable field instrument

 

  • Scattered light characteristics according to Pharmacopeia 5.0
  • Multifunctional LabStation
  • GLP/AQA conform documentation

Accurate measurements in the lower range, e.g. in drinking water, are easily achieved. With the turbidimeters Turb® 430 T and Turb® 430 IR, the user has the choice to perform nephelometric measurements at 90° scattered light, according to the application and standard required.
The Turb® 430 IR meets the DIN 27027/ISO7027 requirements, the Turb® 430 T those of US EPA 180.1. The measuring range is from 0 to 1100 NTU/ FNU and is identified automatically. 
All measurements and menu driven 3-point calibration along with the easy functions for accurate and precise measurements require minimal training. The calibration is performed via an AMCO Clear® standards set (0.02-10-1000 NTU). Up to 1000 data sets with ID numbers can be stored and output using the LabStation and powerful LSdata software. 
The quality of the measurement results is supported by adjustable calibration intervals with documentation.
The Turb® 430 is not only a field measuring instrument (especially with the practical field case), but also a “small lab instrument” for applications up to 1100 NTU/FNU and with optimum data management.
Optional: single meter, field case with LSdata, accessories.

Measuring range NTU
FNU
0 … 1100 / 0-1100
0 … 1100
Resolution   0.01 from 0.00 … 9.99
0.1 from 10 … 99.90
1 from 100 … 1100

Turb® 355 T/Turb® 355 IR – Small portable turbidity meter for control purposes

 

  • 0 – 1100 NTU/FNU
  • Easy operation
  • Convenient

Battery-operated portable turbidity meter with Tungsten lamp according to US EPA or infrared LED (860 nm) for nephelometric measurements according to ISO 7027 / DIN / EN 27 027 (EN ISO 7027): Handy, lightweight and easy-to-operate. 
The Turb® 355 T / IR comes in a handy carrying case. All necessary accessories (calibration standards 0,02 – 10,0 and 1000 NTU, empty cuvettes and batteries) are included. The instrument is powered by 4 AAA batteries.

Measuring range NTU
FNU
0 … 1100
0 … 1100
Resolution  

0.01 NTU from 1 … 9.99
0.1 NTU from 10.0 ... 99.9
1 NTU from 100 ... 1000

 

 

 

Lab Turbidity Meters

Turb® 550/Turb® 550 IR – The professional turbidity meter – Up to 1 000 NTU

 

  • Measuring range 0.01 ... 1 000 NTU with autoranging
  • Automatic 1-3 point calibration
  • Flow-through measurement

Laboratory turbidity meters for nephelometric measurements with automatic 1-3-point calibration and calibration interval monitoring. Measuring range selection from 0.01 ... 1 000 NTU is carried out automatically, and for comparative measurements the current and previous values can be shown on the 2-line display. 
Standard equipment includes instrument with built-in short operating instructions, 3 cuvettes and 3 standards: 0.02 – 10.0 – 1 000 NTU, AMCO Clear® standards with approval for drinking water as primary standards according to US EPA, and according to EN ISO 7027. 
An unpressurized flow-through adapter is available for continuous measurements.

    Turb® 550 Turb® 550 IR
Measuring range NTU
FNU
EBC
Nephelos
FAU
0 ... 1000



0 ... 1000
0 ... 1000


Resolution   0.01 NTU from 0.00 ... 9.99
0.1 NTU from 10.0 ... 99.9
1 NTU from 100 ... 1000
0.01 NTU from 0.00 ... 9.99
0.1 NTU from 10.0 ... 99.9
1 NTU from 100 ... 1000

Turb® 555/Turb® 555 IR – The ADVANCED professional meter – measuring range up to 10 000 NTU

 

  • Measuring range 0.0001 to 10 000 NTU with AutoRange function
  • Automatic 1 ... 5 point calibration
  • Values displayed in
    – NTU
    – EBC
    – FNU, FAU (Turb® 555 IR)
    – Nephelos (Turb® 550)
  • Flow-through measurement

High-precision laboratory turbidity meter with a wide measuring range of 0.0001 to 10 000 NTU (automatic measuring range switching) for all turbidity measuring applications from ultrapure and drinking water measurements, through quality assurance in soft drinks and wastewater treatment. The measuring system with its 4 detectors allows not only nephelometric (90° scatter) measurements and transmittance measurements, but also ratio measurements in which the influences of stray light and sample color are reduced. Comprehensive AQA functions such as monitoring the calibration interval or password protection for calibration and setup access fulfill quality assurance requirements for measured values, and are all also included in the documentation of the measurements. 
Continuous flow-through measurements are possible up to a pressure of 4 bar with FLOW-THRU-TURB vessel. Come complete with 4 AMCO Clear® standards for calibration up to 4000 NTU. For applications up to 10 000 NTU a further standard is available. Due to the precise manufacturing accuracy and long-time stability, the AMCO Clear® standards are preferred compared to Formazin.

    Turb® 555 Turb® 555 IR
Measuring range NTU
FNU
EBC
Nephelos
FAU
0 ... 10000

0 ... 2450
0 ... 67000
0 ... 10000
0 ... 10000
0 ... 2450

0 ... 10000
Resolution   0.0001 NTU from 0.0001 ... 9.9999 NTU
0.001 NTU from 
10.000 ... 99.999 NTU
0.01 NTU from 
100.00 ... 999.99 NTU
0.1 NTU from 
1000.0 ... 9999.9 NTU
0.0001 NTU from 0.0001 ... 9.9999 NTU
0.001 NTU from 
10.000 ... 99.999 NTU
0.01 NTU from 
100.00 ... 999.99 NTU
0.1 NTU from 
1000.0 ... 9999.9 NTU