Wisualarm DHI-HY-GC20C Wi-Fi CO2 Monitor with NDIR Sensor, Battery Powered, App Alerts

Poor indoor air quality can cause fatigue, headaches, and reduced concentration—often without any visible sign. The Wisualarm DHI-HY-GC20C carbon dioxide monitor gives you real-time insight into CO2 levels, so you know exactly when to ventilate. Using a precise NDIR sensor, it measures from 400 to 5000 ppm and alerts you via a loud 85 dB siren and LED indicator when thresholds are exceeded. With built-in Wi-Fi, readings and alarms are sent straight to the Dahua DMSS app on your phone, even when you're away.

Who is it for

This monitor is ideal for homes, offices, classrooms, and any enclosed space where air quality matters. It’s especially useful for families with children, elderly members, or anyone sensitive to stale air. Because it runs on two AA batteries, you can place it anywhere—wall-mounted or on a desk—without worrying about power outlets.

Main features

• NDIR (non-dispersive infrared) sensor for accurate CO2 detection
• Wi-Fi connectivity (2.4 GHz) with app alerts via Dahua DMSS
• Battery-powered with 2x AA batteries, lasts up to one year
• Loud ≥85 dB alarm and clear LED indicator
• Segment LCD display shows current CO2 level
• Configurable alarm thresholds through the app
• Wall-mounted or desktop installation, white ABS housing

Specifications

• Detection range: 400–5000 ppm
• Accuracy: ±50 ppm + 5% of reading
• Response time: under 120 seconds
• Operating temperature: 0°C to +50°C
• Operating humidity: 0% to 95% RH (non-condensing)
• Power source: 2x AA batteries (DC 3V)
• Sound level: ≥85 dB

Tips

Place the monitor at breathing height in rooms where people spend the most time, such as bedrooms, living rooms, or offices. Avoid direct sunlight, drafts, or sources of heat or steam to ensure accurate readings. For best battery life, use high-quality alkaline batteries and check the app regularly for firmware updates.