The combined room sensor NLII-CO₂+TVOC-R-5-RS485 is used for continuous monitoring of indoor air quality in buildings and for subsequent control of the performance of ventilation (HVAC) systems according to the current level of air pollution. The sensor monitors the concentration of Carbon Dioxide (CO₂) and the concentration of total Volatile Organic Compounds (VOCs) in the air (known as TVOC = Total VOC). It is suitable for offices, classrooms, shopping centers, homes, restaurants, fitness centers, commercial properties, etc.

• measures CO₂ and TVOC
• TVOC measurement in accordance with EPA and UBA standards
• three TVOC measurement ranges and additionally an eCO₂ range compatible with CO₂ standard
• 2x output relays – 2x switching contacts, relays switch according to the selected measurement range
• three-level LED indication
• does not disturb at night – automatic LED shutdown at night
• communication via RS485 bus with Modbus RTU protocol
• requires no maintenance during operation
• wide range of power supply voltage