COMET T5641 – PoE WebSensor with External CO₂ Cable Probe 0–10,000 ppm

COMET T5641 – PoE WebSensor with External CO₂ Cable Probe 0–10,000 ppm, NDIR Sensor, IEEE 802.3af 

The COMET T5641 is a professional PoE WebSensor (T-Line) for precise CO₂ concentration measurement with an external cable probe, making it the ideal solution for flexible and accurate monitoring in rooms, ducts, climate chambers, production areas, warehouses, greenhouses, or anywhere the measuring point cannot be located directly at the device. Thanks to Power over Ethernet (IEEE 802.3af), it requires only a single network cable for both data and power, simplifying installation while keeping it clean and cost-efficient.

The maintenance-free dual-wavelength NDIR sensor with multipoint calibration and automatic aging compensation measures CO₂ extremely accurately from 0 to 10,000 ppm (±(100 ppm + 5 % of reading) at 25 °C and 1013 hPa). The external probe (1-meter cable) allows optimal placement in ventilation ducts, confined spaces, or critical points. CO₂ values are shown on the integrated display or indicated by a color LED, providing immediate visibility for quick response.

Via Ethernet (RJ45) with PoE, the sensor integrates seamlessly into networks. Direct connection to the COMET Cloud (3 months free, then 1 Credit/year) provides graphs, exports, alarms, and remote access via app or web browser. Alternatively, Modbus TCP, SNMP, JSON, or XML can be used for integration into your own SCADA/BMS/IoT system. The robust design (IP30 electronics, IP65 probe) and operating temperature range of –20 to +60 °C make the T5641 a reliable solution for continuous operation both indoors and outdoors.

Why the COMET T5641 is the professional CO₂ WebSensor with PoE:

• Power over Ethernet IEEE 802.3af – power + data through one cable
• External 1 m cable probe – flexible for difficult measurement points
• Extended CO₂ range 0–10,000 ppm – for demanding applications
• High-precision NDIR sensor – dual-wavelength & aging compensation
• Ethernet interface – direct network integration
• COMET Cloud ready – 3 months free, then low cost
• Modbus TCP, SNMP, JSON, XML – open for third-party systems
• LED + display – color signaling & visualization
• Remote alarm function – e-mail, SNMP trap, Syslog
• IP65 probe – for humid & dusty environments
• 3-year warranty

Technical data T5641:

• CO₂ measuring range: 0 to 10,000 ppm
• CO₂ accuracy: ±(100 ppm + 5 % of reading) at 25 °C and 1013 hPa
• Resolution: 1 ppm
• Measurement interval: 15 s
• Probe cable length: 1 meter (standard)
• 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
• Power supply: PoE IEEE 802.3af or 9–30 V DC
• Operating temperature: –20 to +60 °C
• Protection rating: IP30 electronics, IP65 probe
• Dimensions: 136 × 117 × 45 mm
• Warranty: 3 years

Perfectly suited for:

• Ventilation & air-conditioning systems (HVAC)
• Schools, offices & conference rooms
• Data centers & server rooms
• Production halls & warehouses
• Hospitals & medical practices
• Indoor air quality according to DIN 1946-6
• Flexible measuring points with cable probe
• Smart building & energy management

Installation & commissioning – done in minutes

Mount the device, connect the PoE network cable, place the probe at the desired measuring point – done! The integrated web interface guides you through setup. Online with COMET Cloud in seconds – no external power supply required.

Summary:

• CO₂ WebSensor with Power over Ethernet (PoE) and remote alarm
• A multi-level CO₂ and temperature adjustment process ensures excellent measurement accuracy over the entire temperature range
• Essential for process control and outdoor applications
• The dual-wavelength NDIR CO₂ measurement method automatically compensates for aging effects
• The CO₂ module is highly dirt-resistant, maintenance-free, and offers outstanding long-term stability
• CO₂ concentration is displayed on the screen or indicated by a color LED

Scope of delivery:

• T5641
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration
• COMET Cloud for 3 months