COMET T6640 – PoE WebSensor for CO₂, Temperature (-30 to +80 °C), and Humidity

COMET T6640 – PoE WebSensor for CO₂, Temperature –30 to +80 °C, Humidity, Dew Point, IEEE 802.3af 

The COMET T6640 is a high-performance PoE WebSensor (T‑Line) for simultaneous measurement of CO₂ concentration, temperature, and relative humidity, featuring integrated sensors and Power over Ethernet (IEEE 802.3af). As a true remote CO₂ monitor, thermometer, and hygrometer, it is the ideal solution for professional indoor air quality monitoring in offices, schools, conference rooms, server rooms, production halls, hospitals, theaters, or anywhere good air quality is critical for health, concentration, and productivity.

The maintenance-free dual-wavelength NDIR sensor with multipoint calibration and automatic aging compensation measures CO₂ accurately from 0 to 5000 ppm (±(50 ppm + 3 % of reading) at 25 °C and 1013 hPa). The capacitive polymer sensor guarantees excellent long-term stability for temperature (–30 to +80 °C, ±0.6 °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 can display CO₂, temperature, humidity, or dew point and can be switched off during continuous operation. CO₂ concentration is also indicated by a color LED, providing instant visibility for fast reactions. Via Ethernet (RJ45) with PoE, the sensor integrates seamlessly into networks—power and data over 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, use Modbus TCP, SNMP, JSON, or XML for integration into your own SCADA/BMS/IoT system.

The robust housing and operating temperature range of –30 to +60 °C make the T6640 a reliable partner for continuous operation, both indoors and outdoors. Power over Ethernet simplifies installation - cleaner and more cost-effective - with no separate power supply required.

Why the COMET T6640 is the professional CO₂ WebSensor with PoE:

• Power over Ethernet IEEE 802.3af – power + data through one cable
• 3‑in‑1: CO₂ + temperature + humidity – with high‑grade NDIR sensor
• Ethernet interface – direct network connection
• COMET Cloud ready – 3 months free, then low‑cost
• Modbus TCP, SNMP, JSON, XML – open for third‑party systems
• Dual‑line LCD + color LED – display and indication
• Highest precision – CO₂ ±(50 ppm + 3 %), Temp. ±0.6 °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 T6640:

• CO₂ measuring range: 0 to 5000 ppm (optional up to 10,000 ppm)
• CO₂ accuracy: ±(50 ppm + 3 % of reading) at 25 °C and 1013 hPa
• Temperature range: –30 to +80 °C (±0.6 °C)
• Relative 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
• Power supply: PoE IEEE 802.3af or 9–30 V DC
• Operating temperature: –30 to +60 °C
• Protection: IP30
• Warranty: 3 years

Perfectly suited for:

• Schools, kindergartens & lecture halls
• Offices & open‑plan offices
• Meeting & conference rooms
• Server rooms & data centers
• Hospitals & medical facilities
• Production & storage halls
• Indoor air quality per DIN 1946‑6
• Smart building & energy management

Setup – completed in minutes

Connect the PoE network cable – done! The integrated web interface guides you through setup. Online with COMET Cloud in seconds – no external power supply required.

Summary:

• Temperature, humidity, and CO₂ WebSensor with Power over Ethernet (PoE) and remote alarm
• A multi‑stage CO₂ and temperature adjustment process ensures excellent CO₂ measurement accuracy across 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 shown on the display or indicated by a color LED

Scope of delivery:

• T6640
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration
• COMET Cloud for 3 months