Several decades have passed since the appearance of the first Lovibond® PC 100 photometer system. Since that time, Tintometer has become a world-famous name as the manufacturer of photometer systems sold under the brand name of Lovibond®. Their range of photometer systems extends from the MD 100 as hand-held model over the multi parameter photometer MD 200 as desktop model to the SpectroDirect spectrophotometer for laboratories. The multi-functional PM 600 & 620 photometers provide the answer to all requirements relating to the analysis of water used in modern swimming pools and baths. They offer a wide variety of pre-programmed methods and are therefore suitable for the demands of modern water analysis. All the parameters which can be measured with Lovibond® photometer systems are set out in the table. This table also explains what parameters can be measured with which photometer.