COMET T6545 – PoE Duct-Mounted WebSensor for CO₂, Temperature (-30 to +60 °C), and Humidity

COMET T6545 PoE Duct-Mount CO₂ + Temperature + Humidity Sensor 

The COMET T6545 is a professional PoE duct-mount WebSensor (T-Line) for precise measurement of CO₂ concentration, temperature, and relative humidity directly in the ventilation duct – featuring integrated sensors and Power over Ethernet (IEEE 802.3af). As a true remote CO₂ monitor, thermometer, and hygrometer for HVAC systems, ventilation, air-conditioning technology, clean rooms, production halls, and industrial applications, it is the ideal solution for continuous monitoring of air quality in ducts and pipes.

The maintenance-free dual-wavelength NDIR sensor with multipoint calibration and automatic aging compensation accurately measures CO₂ from 0 to 5000 ppm (±(50 ppm + 3 % of reading) at 25 °C and 1013 hPa). The capacitive polymer sensor ensures excellent long-term stability for temperature (–30 to +60 °C, ±0.4 °C) and humidity (0 to 100 %RH, ±2.5 %RH). All humidity parameters (dew point, absolute humidity, specific humidity, mixing ratio, specific enthalpy) are automatically calculated and immediately available.

The dual-line LCD optionally displays CO₂, temperature, humidity, or dew point and can be switched off during continuous operation. Via Ethernet (RJ45) with PoE, the sensor integrates seamlessly into networks – power and data through a single cable! Direct connection to the COMET Cloud (3 months free, then 1 credit/year) enables graphs, data exports, alarms, and remote access via app or browser. Alternatively, Modbus TCP, SNMP, JSON, or XML allow integration into your own SCADA/BMS/IoT system.

The robust duct-mount housing and the operating temperature range of –30 to +60 °C make the T6545 a reliable partner for demanding continuous use in ventilation systems. PoE simplifies installation – cleaner, faster, and more cost-efficient – no separate power supply needed.

Why the COMET T6545 is the professional PoE duct-mount CO₂ sensor:

• Power over Ethernet IEEE 802.3af – power and data via one cable
• Duct-mount design – direct installation in ventilation ducts
• 3-in-1: CO₂ + temperature + humidity – with premium NDIR sensor
• Ethernet interface – direct network integration
• COMET Cloud ready – 3 months free, then affordable credit
• Modbus TCP, SNMP, JSON, XML – open to third-party systems
• Dual-line LCD – switchable
• High accuracy – CO₂ ±(50 ppm + 3 %) | Temp. ±0.4 °C | Humidity ±2.5 %RH
• Dew point and all humidity parameters integrated
• Remote alarm function – E-mail, SNMP Trap, Syslog
• 3-year warranty

Technical data T6545:

• CO₂ measuring range: 0 to 5000 ppm
• CO₂ accuracy: ±(50 ppm + 3 % of reading) at 25 °C and 1013 hPa
• Temperature measuring range: –30 to +60 °C (±0.4 °C)
• Humidity: 0 to 100 %RH (±2.5 %RH)
• Dew point: –60 to +80 °C (±1.6 °C at T<25 °C and RH>30 %)
• Resolution: 1 ppm / 0.1 °C / 0.1 %RH
• Interface: Ethernet (RJ45) with PoE IEEE 802.3af
• Cloud: COMET Cloud (3 months free)
• Protocols: WWW, Modbus TCP, SNMPv1, SOAP, XML
• Alarm protocols: E-mail, SNMP Trap, Syslog
• Display: Dual-line LCD, switchable
• Power supply: PoE IEEE 802.3af or 9–30 V DC
• Operating temperature: –30 to +60 °C
• Warranty: 3 years

Perfectly suited for:

• Ventilation and air-conditioning systems (HVAC)
• Data centers and server rooms
• Clean rooms and pharmaceutical production
• Production halls and warehouses
• Meteorological and environmental monitoring stations
• Building automation and BMS systems
• Duct installations without separate power supply
• Integration into existing networks

Installation & commissioning – done in minutes

Mount the sensor directly into the ventilation duct, connect the PoE network cable – done! The integrated web interface guides you through setup. With COMET Cloud you’ll be online in seconds – no external power supply required.

Summary:

• WebSensor with integrated CO₂, temperature, and relative humidity sensors for duct installation
• Multi-step adjustment process for CO₂ and temperature ensures excellent measurement accuracy across the entire operating temperature range
• Essential for process control and outdoor applications
• Dual-wavelength NDIR CO₂ measurement automatically compensates for sensor aging
• The CO₂ module is highly resistant to contamination, maintenance-free, and features outstanding long-term stability
• CO₂ concentration is displayed or indicated by a color LED.

Scope of delivery:

• T6545
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration
• COMET Cloud for 3 months
• Power adapter not included