A Simple Control System for Ozone Gas Generation and Its Concentration Measurement

Abstract

In this paper, for safe indoor hygiene management utilizing ozone gas, we present a simple control system that we have realized using Arduino that can control both the gas generator and the measuring sensor of the gas concentration. The hardware elements in the system consists of a silent discharge ozone generator module, an ozone sensor of tungsten trioxide (WO₃) thin film and other sensors of temperature and humidity, which are connected to a micro-processor Arduino Uno with an IoT wireless communication device of SigFox. Although they are commercially available devices, as far as we know, there is no such low-cost and simple ozone gas concentration control system. Also in this paper, illustrating the results of evaluation experiment, we show that the system can appropriately control and maintain the ozone gas concentration at the safe level (≦0.1 ppm) recommended by the Japan Society for Occupational Health.