COMET T5545 – WebSensor for CO₂ 0–5000 ppm, Duct Mount

COMET T5545 PoE Duct Mount, CO₂ Sensor, Ethernet 

The COMET T5545 is a professional PoE duct-mount WebSensor (T-Line) for precise measurement of CO₂ concentration directly in the ventilation duct – with an integrated NDIR sensor and Power over Ethernet (IEEE 802.3af). As a true remote CO₂ monitor for HVAC systems, ventilation units, air-conditioning technology, clean rooms, production halls, or industrial processes, it is the ideal solution for continuous air quality monitoring in ducts, pipes, and flow systems.

The maintenance-free dual-wavelength NDIR sensor with multipoint calibration and automatic aging compensation measures CO₂ extremely accurately from 0 to 5000 ppm (±(50 ppm + 3% of reading) at 25 °C and 1013 hPa) and can optionally be extended up to 10,000 ppm. The sensor is highly resistant to contamination and offers long-term stability – perfect for process control and outdoor applications. CO₂ values are shown on the integrated display or indicated by a color LED – visible at a glance for quick response.

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) for charts, exports, alarms, and remote access via app or browser. Alternatively, use Modbus TCP, SNMP, JSON, or XML for your own SCADA/BMS/IoT solution. The T5545 is robust, maintenance-free, and designed for continuous operation in ventilation systems.

Why the COMET T5545 is the professional duct CO₂ sensor with PoE:

• Power over Ethernet IEEE 802.3af – power + data via one cable
• Duct-mount design – direct installation in ventilation duct
• Pure focus on CO₂ – 0 to 5000 ppm
• Accurate NDIR sensor – dual-wavelength & aging compensation
• Ethernet interface – direct network connectivity
• COMET Cloud ready – 3 months free, low cost afterward
• Modbus TCP, SNMP, JSON, XML – open for third-party systems
• LED + display – color signaling & visual indication
• Remote alarm function – email, SNMP trap, syslog
• 3-year warranty

Technical data T5545:

• CO₂ measuring range: 0 to 5000 ppm
• CO₂ accuracy: ±(50 ppm + 3% of reading) at 25 °C and 1013 hPa
• Resolution: 1 ppm
• Measuring interval: 15 s
• Interface: Ethernet (RJ45) with PoE IEEE 802.3af
• Cloud: COMET Cloud (3 months free)
• Protocols: WWW, Modbus TCP, SNMPv1, SOAP, XML
• Alarm protocols: Email, SNMP Trap, Syslog
• Power supply: PoE IEEE 802.3af or 9–30 V DC
• Operating temperature: –30 to +60 °C
• Protection class: IP30 electronics, IP20 sensor
• Dimensions: 89 × 73 × 240 mm; probe length 130 mm
• Weight: approx. 260 g
• Warranty: 3 years

Perfectly suited for:

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

Installation & commissioning – done in minutes

Install the sensor directly into the ventilation duct (probe length 130 mm), connect the PoE network cable – done! The integrated web interface guides you through setup. Online with COMET Cloud in seconds – no extra power adapter needed.

Summary:

• WebSensor with integrated CO₂ concentration sensor for duct installation
• A multi-stage CO₂ and temperature adjustment process ensures excellent CO₂ measurement accuracy across the entire operating temperature range
• This is essential for process control and outdoor applications
• The dual-wavelength NDIR CO₂ measurement method automatically compensates for aging effects
• The CO₂ module is highly resistant to contamination, maintenance-free, and features outstanding long-term stability
• The CO₂ concentration is displayed on the screen or indicated by a color LED.

Scope of delivery:

• T5545
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration
• COMET Cloud for 3 months
• Power supply not included