This handheld ozone monitor is the perfect tool for fast and high accuracy ozone monitoring in laboratory and outdoor environments. This portable ozone sensor is very appropriate for ozone monitoring in microarray applications. Actually fluorescent dyes used in microarray applications are degraded by ozone after exposure for periods as short as 10-30s under ozone levels as low as 5-10 ppb (ppb: part per billion). Consequently, ultra low ozone levels need to be monitored with very high precision in microarray applications. This highly sensitive Microarray Ozone Sensor was meant for ultra low ozone levels monitoring with very high precision and short response time.