You are using a version of Internet Explorer (version 8 and / or older) or the compatibility mode, which does not support some functionalities of the site you're viewing. This page can be displayed correctly you therefore may not. In order to use the full functionality of the site is a current Internet Explorer or another browser (eg: Google Chrome, Firefox) necessary.

Portable colorimeter pHotoFlex® Turb

WTW portable photometer pHotoFlex® Turb
WTW portable photometer pHotoFlex® Turb open
WTW's portable colorimeter as Set pHotoFlex® Turb/SET in field case with table

pHotoFlex® Turb: portable multi-parameter photometer with full value pH, ORP and turbidity measurement for water analytics and environmental monitoring

  • Versatile with special methods NH3 and CO2
  • Unique combination with pH and turbidity measurement
  • Turbidity measurement of 0.01 - 1,100 NTU according to DIN ISO 27027

With its unique combination of photometric, electro-chemical pH and turbidity measurement with lab precision, the pHotoFlex® Turb is the most versatile meter for extensive work - from the environmental and process monitoring at changing sites, via fish hatcheries all the way to drinkingn water analytics and monitoring by health offices and service labs.

The energy-efficient LED optics with 6 wavelengths and a smart adapter for a variety of applications with 16 and 28 mm cuvettes allows the measurement of the smallest concentration with more than 150 programs for standard parameters, special methods and coloration. There is a large selection of test sets of lot-certified cuvettes all the way to economic powder reagents available. A list of favorites for the most commonly used tests, sample ID numbers and more than 3,000 measurements per battery set facilitate field measurements.

The integrated pH function is a complete electro-chemical pH measurement of pH 0-16 with automatic buffer recognition (TEC/NIST) by using the comprehensive WTW selection of pH measuring chains. The temperature compensation automatically takes place in the admissible measuring ranges from -5 … 100 °C. The WTW MultiCal® routine allows the automatic calibration with up to 3 calibration points. or field use, there is, for instance, the maintenance-free SenTix® 41 is recommended, for precision measurements in the lab, the glass electrode SenTix® 81 is frequently used.
The pHotoFlex®Turb also has an infrared light source (IR) for the nephelometric turbidity measurement (90°) according to DIN 27027 / ISO 7027. In combination with th e long-term stable AMCO Clear® standard, the highest possible precision is also warranted for the sensitive drinking water area.

The optional PC software LSdata offers a GLP-compliant data evaluation with data filter and allows the input of up to 100 user-defined programs, automatically calculate these as methods and save them to the pHotoFlex®.

For the convenient use in the field, there is a case set available, including the pH probe SenTix® 41 and turbidity standards as a mobile lab with work surface and storage compartment as well as a lot of accessories, such as pH standards, tripod, pipettes and replacement batteries. For lab use, the photometer can be used in conjunction with a LabStation (optional) with site-supplied power and fitted with an external barcode reader.


Model Description Order no.
pHotoFlex® Turb Portable LED photometer with 6 wavelengths for 16 and 28 mm cuvettes in combination with electro-chemical pH and DIN/ISO-compatible turbidity measurement (IR) 251110
pHotoFlex® Turb/SET Like the single unit, but in a field case with tabel insert, pH probe SenTix® 41, turbidity standard set, PC software LSdata, cable and accessories 251210

Technical Data

Light source LED
Wavelength nm 436, 517, 557, 594, 610, 690 + 860
Own methods 100
Data memory 1,000 measurements
pH/Redox pH 0-16 with automatic temperature control (ATC)
Turbidity 0-1100 NTU/FNU, nephelometric, DIN ISO conform
Accuracy Photometry: <2 nm Wellenlängengenauigkeit, 0,005 Abs Reproduzierbarkeit
pH: ±0.01 pH
Turbidity (NTU / FNU):0.01 NTU/FNU or ±2% of the measured value


Model Description Order no.
LSdata Flex/430 PC software for GLP-compliant data management and programming of you own methods 902762
LS Flex/430 LabStation for the easy operation and evaluation in the lab, with PC software LSdata for GLP-compliant data evaluation, zero modem cable, battery and universal power supply, RS232 interface for the use of a barcode reader 251301
RB Flex/430 Battery with universal power plug 251300
FC pHotoFlex®/Turb® 430 Field case with table insert for device, tripod and cuvettes for convenient work in the field. Additionally: Pipette holder and storage room for utensils, empty 251304
LK28-Set 12 replacement cuvettes, round 28 x 60 mm 251302
RK 14/25 25 round cuvettes, outer diameter 16 mm, empty 250621
Kal.Kit.Turb® 430 IR Calibration set for Turb® 430 / photoFlex® Turb 600560


Are you interested
in signing up for the free
WTW newsletter?

WTW Newsletter Registration

Any Question?
We advise
you gladly!

WTW Contact

Would you like to know more?

Basics and principles for water, routine and general analysis – we share our know how: 

WTW Photometry Compendium in cooperation with the G.I.T. Laboratory Journal

in cooperation with the G.I.T. Laboratory Journal.

  • applied tips 
  • additional information
  • even more

Take a look!