Sensair S8 Residential CO₂ Sensor
The Sensair S8 is a compact, high-performance CO₂ sensor designed for accurate and reliable indoor carbon dioxide monitoring.Using advanced NDIR (Non-Dispersive Infrared) technology, the S8 delivers stable, long-term CO₂ measurements with low power consumption and minimal maintenance. Designed as a plug-in CO₂ sensor for the Smart Temp Viking RS-SSD Smart Sensor and SMT-850 Halo thermostat, it enables accurate CO₂ monitoring to help improve indoor air quality and support demand-controlled ventilation.
Features
- Operating principle non-dispersive infrared (NDIR)
- Measured gas CO₂
- Measurement range 400–10 000ppm
- Accuracy ±40 ppm ±3% of reading1
- Operating range RH <85 % RH
- Operation range °C <50 °C
- Warm-up time <60s
- Response time ≤30s
- Power supply 4.5 – 5.25 V
- Peak current 300 mA
- Average current 18mA
- Communication Modbus protocol, UART
- Outputs Digital
- Compliance ANSI/ASHRAE Standard 62.1-2022, RESET Standard Grade B, WELL Building Standard® (WELL v2™)
- Maintenance free
- Life expectancy >15 years
- Dimensions 33.9 x 19.8 x 8.7 mm (L x W x H)
- Weight 8 g
- Storage conditions -40–70 °C



