The portable Photoflex™ STD with energy-efficient LED optics is equipped with six wavelengths and a foldable adapter for diverse applications with 16 mm and 28 mm cuvettes, even for the smallest concentrations. With over 180 programs for standard parameters and colorimetry, as well as a wide range of test kits, from batch-certified cuvettes to cost-effective powder reagents, it is suitable for monitoring in healthcare facilities, environmental monitoring, and service laboratories. A favorites list for frequently used tests, sample ID numbers, and over 3,000 measurements per battery set facilitate field measurements. An elegant folding mechanism allows for easy switching between the two cuvette sizes without changing the cuvette holder. The optional LSdata PC software offers GLP-compliant data evaluation with data filters and the ability to input up to 10 user-defined programs, automatically calculate them as a method, and save them to the Photoflex™. For convenient fieldwork, a mobile laboratory kit is available, complete with a work surface and storage compartment, as well as a wide range of accessories such as pipettes, cuvettes, and spare batteries. For laboratory use, the photometer can be used with an optional LabStation powered on-site and equipped with an external barcode reader.