The multi-parameter photometer is a portable measuring device for liquid analysis. It allows for a wide range of measurements. With this photometer, it is possible to determine alkalinity, chlorine, cyanuric acid, and pH levels, for example. To perform a measurement, a 10 ml water sample must be placed in a cuvette. The built-in LED generates a test light at wavelengths of 503 nm, 570 nm, and 620 nm. A photodiode detects the value to be measured based on the light transmittance of the sample. Each measurement is automatically saved. The stored measurement values can be read via a mobile device using the integrated Bluetooth interface. A free app is available for analyzing the measurement values. It is also possible to establish a Bluetooth connection between the photometer and a computer. Free software is also provided for analyzing the measurement data. Another special feature is that the measurement data can be uploaded to a cloud via both methods and accessed from anywhere. This service is also free.