COMET T6440 CO₂ + Temperature + Humidity RS485

COMET T6440 CO₂ + Temperature + Humidity RS485

The COMET T6440 is a powerful 3-in-1 transmitter designed for professional indoor air quality monitoring. It simultaneously measures CO₂ concentration (0–5000 ppm), temperature (–10 to +50 °C), and relative humidity (5–95 %RH). Thanks to the large 3-color LED indicator, you can instantly see the air quality status: Green = good (≤1000 ppm), Yellow = moderate (1001–1200 ppm), Red = take action (≥1201 ppm).

Perfect for all places where many people gather: schools, kindergartens, offices, conference rooms, lecture halls, medical practices, gyms, restaurants, and all locations where demand-controlled ventilation saves energy and supports health at the same time.

Through the RS485 interface with Modbus RTU protocol, the T6440 can be easily integrated into any building automation, ventilation control, or SCADA system. The maintenance-free NDIR CO₂ sensor with automatic calibration ensures long-term precision without periodic adjustment.

The robust housing is designed for continuous operation from –30 to +60 °C – ideal for unheated technical areas or corridors.

Why the COMET T6440 is the No. 1 for indoor air quality:

• 3 measurements in one device: CO₂ + Temperature + Humidity
• Accurate NDIR CO₂ sensor 0–5000 ppm (±50 ppm + 3 %)
• 3-color LED indicator – air quality visible at a glance
• RS485 Modbus RTU – ideal for BMS and ventilation control
• Dew point calculation integrated
• Maintenance-free thanks to automatic CO₂ calibration
• Rugged housing – operating temperature –30 to +60 °C
• Optional range up to 10,000 ppm (available upon request)
• Easy wall mounting
• 3-year warranty

Technical Data:

• CO₂ measuring range: 0 to 5000 ppm (optional up to 10,000 ppm)
• CO₂ accuracy: ±(50 ppm + 3 % of reading) at 25 °C
• CO₂ resolution: 1 ppm
• Temperature: –10 to +50 °C (±0.5 °C), resolution 0.1 °C
• Humidity: 5 to 95 %RH (±2.5 %RH), resolution 0.1 %RH
• Dew point: –60 to +80 °C (±1.6 °C at T < 25 °C and RH > 30 %)
• LED indicator: Green ≤1000 ppm | Yellow 1001–1200 ppm | Red ≥1201 ppm
• Communication: RS485, Modbus RTU (other protocols on request)
• Operating temperature: –30 to +60 °C
• Power supply: 9–30 V DC
• Protection rating: IP30 (indoor use)
• Mounting: Wall mounting
• Warranty: 3 years

Ideal for:

• Schools, kindergartens, universities
• Offices, open-plan offices, call centers
• Conference and meeting rooms
• Hospitals, medical practices, nursing homes
• Restaurants, gyms, wellness facilities
• Demand-controlled ventilation (HVAC)
• Building automation and energy management
• CO₂ traffic light systems according to current guidelines

Installation – easy as can be

Simply fix two screws to the wall, connect power and RS485 – ready to operate in minutes. The LED indicator immediately shows the current air quality status.

Summary:

• Sensor for temperature, humidity, and CO₂ concentration
• Suitable for indoor and covered outdoor use
• Green LED on: CO₂ 0–1000 ppm
• Yellow LED on: CO₂ 1001–1200 ppm
• Red LED on: CO₂ ≥1201 ppm

Scope of Delivery:

• T6440 unit
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration