COMET T6641 – PoE WebSensor with Cable Probes, CO₂, Temperature -30 to +105 °C, Humidity

COMET T6641 – PoE WebSensor with External Cable Probes for CO₂, Temperature, Humidity, Dew Point 

The COMET T6641 is a high‑performance PoE WebSensor (T‑Line) for simultaneous measurement of CO₂ concentration, temperature, and relative humidity, featuring external cable probes and Power over Ethernet (IEEE 802.3af). As a true remote CO₂ monitor, thermometer, and hygrometer with cable probe, it is the ideal solution for flexible, precise monitoring in rooms, ducts, climate chambers, production lines, warehouses, greenhouses, or anywhere the measuring points cannot be located directly on the device.

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 probes (1 meter standard) measure temperature up to +105 °C (±0.4 °C) and humidity from 5 to 95 %RH (±2.5 %RH). All humidity parameters (dew point, absolute humidity, specific humidity, mixing ratio, specific enthalpy) are automatically calculated and instantly available.

The dual‑line LCD displays CO₂, temperature, humidity, or dew point as desired and can be switched off during continuous operation. CO₂ concentration is also indicated by a color LED - immediately visible for fast response. Via Ethernet (RJ45) with PoE, the sensor integrates seamlessly into networks - power and data through a single cable. Direct connection to COMET Cloud (3 months free, then 1 Credit/year) enables charts, exports, alarms, and remote access via app or browser. Alternatively, Modbus TCP, SNMP, JSON, or XML can be used for integration with your own SCADA/BMS/IoT system.

The robust housing (IP30 electronics, IP65 probes) and an operating temperature range of –20 to +60 °C make the T6641 a reliable partner for demanding continuous operation, both indoors and outdoors. Power over Ethernet simplifies installation - cleaner, easier, and more cost‑effective, with no separate power supply required.

Why the COMET T6641 is the professional CO₂ WebSensor with PoE:

• Power over Ethernet IEEE 802.3af – power + data via one cable
• External cable probes – maximum flexibility for measurement locations
• 3‑in‑1: CO₂ + temperature + humidity – equipped with a superior NDIR sensor
• Ethernet interface – direct network integration
• COMET Cloud ready – 3 months free, then affordable
• Modbus TCP, SNMP, JSON, XML – open for third‑party systems
• Dual‑line LCD + color LED – display and status indication
• Highest precision – CO₂ ±(100 ppm + 5 %) | Temp. ±0.4 °C | Humidity ±2.5 %RH
• Dew point and all humidity parameters integrated
• Remote alarm function – e‑mail, SNMP Trap, Syslog
• IP65 probes – for humid and dusty environments
• 3‑year warranty

Technical data T6641:

• CO₂ measuring range: 0 to 10,000 ppm
• CO₂ accuracy: ±(100 ppm + 5 % of reading) at 25 °C and 1013 hPa
• Temperature range: –30 to +105 °C (±0.4 °C)
• Humidity: 5 to 95 %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
• 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 probes
• Dimensions: 136 × 117 × 45 mm
• Warranty: 3 years

Perfectly suited for:

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

Installation – ready in minutes

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

Summary:

• WebSensor with cable probes for temperature, humidity, and CO₂ with PoE functionality
• A multi‑stage CO₂ and temperature adjustment process ensures excellent CO₂ 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 resistant to contamination, maintenance‑free, and offers exceptional long‑term stability

Scope of delivery:

T6641

User manual

Traceable calibration certificate

Free TSensor software for transmitter configuration

COMET Cloud for 3 months