Macherey Nagel PF-11 photometer. Portable photometer for field and laboratory use. For the evaluation of VISOCOLOR and VISOCOLOR ECO kits and tests in NANOCOLOR cuvettes. Direct reading in mg/L. Extinction measurement. Cuvette lock for 16 mm round tubes. Easy to use. Photometric pH measurement. Manual wavelength adjustment: 380/405/470/520/605/720 nm. Light source: Tungsten lamp. Powered by four batteries. Suitcase. User manual.