2.8-inch color LCD display with 320 x 240 resolution provides clear ozone readings at a glance Alarm and safety: user adjustable O3 threshold to trigger alerts when residual ozone exceeds safe levels What it does: detects residual ozone in offices, indoor spaces, outdoors, and after disinfection processes; helps protect occupants and verify cleaning effectiveness How it works: integrated fan pulls ambient air through the sensor for faster real time results and more reliable readings Why it matters: enables quick decisions to ventilate or pause activities, supports compliance with safety guidelines, and reduces exposure risk Design and build: compact, robust unit suitable for desktop placement or portable use in a range of settings Performance and convenience: real time monitoring with rapid response thanks to direct air sampling Use scenarios - After ozone based cleaning in an office or clinic, verify safe levels before reentry - Monitor classrooms, gyms, or shared spaces following disinfection in schools or public facilities - Track outdoor work zones near ozone generating equipment to ensure ambient levels stay within limits