EPHOTON stationary photometer for swimming pools for the analysis of pH, RX, free and (or) total chlorine in water by colorimetric method. ePHOTON is a series of modern stationary photometric controllers for the analysis of water quality in swimming pools, and especially for small children's pools.The photometric controller is designed for simultaneous analysis of electrochemical parameters: the pH level and RedOx (redox potential), and also measures the concentration of free and total chlorine in water by colorimetric method.The ePHOTON photometric system uses advanced colorimetric technology to measure the content of free and total chlorine in water, which is the most progressive and reliable method of water quality control today.