Portable Photometers

WTW’s line of portable pHotoFlex photometers and Turb 430 turbidimeters now comprises five instruments whose capabilities are shown in the table below:









pHotoFlex Turb




pHotoFlex STD




Turb 430 IR


x (IR range)


Turb 430 T


x (vis range)



The instruments have been designed to extract the optimum performance from the latest generation optics with state-of-the-art LED technology.

Using these optics and an intuitive easy-to-use software, the units offer best-in-class performance.

Remarkable features include:

  • Low power consumption
  • Robust
  • Display-driven user interface
  • Waterproof
  • Integrated smart cuvette adapter
  • Hand held opation


The pHotoFlex and pHotoFlex Turb are true all-rounders, allowing the use of a wide range of test reagents with 16 and 28 mm cuvettes. An integrated variable smart adapter allows easy change over from one cuvette type to another.

The pHotoFlex Turb has been designed specifically for the drinking water industry. Advanced features including a “light trap” to minimise stray light for accurate readings even with low concentration samples. Performing one of the advanced calibration methods further improves accuracy.

Both the pHotoFlex and pHotoFlex Turb are equipped with a pH function, measuring the full pH range from –2.00  to +16.00.  The pH measurement is simplicity itself, offering automatic temperature compensation and auto buffer recognition.

For turbidity measurement the Turb 430 IR offers a large range from 0-1100 NT/FNU. Outstanding features include: Automatic 3-point calibration, GLP compliant data export via RS 232, calibration record and the setting of a calibration interval. The instrument complies to DIN 27027/ISO 7027. A second version, the Turb 430 T is available to comply to US EPA 180.1.

The exceptional versatility of the pHotoFlex, pHotoFlex STD, pHotoFlex Turb and Turb 430 IR makes them ideal for use in process control, water analysis and beverage industry.



Xylem Analytics Germany Sales GmbH & Co., WTW
Dr.-Karl-Slevogt-Str. 1
82362 Weilheim
Phone: +49 881 183 0
Telefax: +49 881 183 420

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