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Portable colorimeter pHotoFlex® STD

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

pHotoFlex® STD: portable LED photometer for environmental monitoring and extensive water and routine analytics in (mobile) service labs

  • Intuitive and easy operation
  • Captive adapter for two cuvette sizes
  • Robust and waterproof

The portable pHotoFlex® STD with energy-efficient LED optics is equipped with 6 wavelengths and a foldable adapter for various applications with 16 mm and 28 mm cuvettes, for even the smallest concentrations. With more than 180 programs for standard parameters and coloration as well as a multitude of test kits - from lot-certified cuvettes to economic powder reagents, it is suitable for monitoring by health offices via environmental monitoring all the way to service labs. 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.

An elegant folding mechanism allows the easy switch between the two cuvette sizes without the need to exchange the cuvette holder.

The optional PC software LSdata offers GLP-compliant data evaluation with data filters and the input of up to 10 user-defined programs, calculate them as a method automatically and save them to pHotoFlex®.

For convenient work in the field, a case set is a available as a mobile lab with a work surface and storage compartment as well as a lot of accessories, such as pipettes and cuvettes and spare 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® STD Portable LED photometer with 6 wavelengths for 16 and 28 mm cuvettes 251105
pHotoFlex® STD/SET Like the single unit, but in the field case with table insert, PC software LSdata, cable and accessories 251205

Technical Data

Light source LED
Wavelength nm 436, 517, 557, 594, 610, 690
Own methods 10
Data memory 100 measurements
Accuracy Photometry <2 nm wavelength accuracy, 0.005 abs. reproducibility


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
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 compartment for utensils, empty 251304
LK28-Set 12 spare cuvettes, round, 28 x 60 mm 251302
RK 14/25 25 round cuvettes 16 outer diameter, empty 250621

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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

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WTW - pHotoFlex® special offer