COMET T5540 – WebSensor for CO₂ 0–5000 ppm

COMET T5540 WebSensor CO₂ Ethernet 

The COMET T5540 is a compact and precise Ethernet WebSensor (T‑Line) designed for CO₂ concentration measurement – the ideal solution for monitoring indoor air quality in offices, schools, conference rooms, server rooms, production halls, hospitals, theaters, or any other environment where increased CO₂ levels can lead to fatigue, lack of concentration, and health risks. The maintenance‑free dual‑wavelength NDIR sensor with multipoint calibration and automatic aging compensation measures very accurately from 0 to 5000 ppm (±(50 ppm + 3 % of reading) at 25 °C and 1013 hPa) and is optionally extendable up to 10 000 ppm.

CO₂ values are shown on the integrated display or indicated by a color LED – instantly visible for all room occupants. Via Ethernet (RJ45), the sensor integrates seamlessly into networks – with direct connection to COMET Cloud (3 months free, then 1 credit/year) for charts, 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 solution.

The robust housing and operating temperature range from –30 to +60 °C make the T5540 a reliable partner for demanding continuous operation – indoors or outdoors. No dedicated server required – COMET Cloud manages all data processing. The sensor is maintenance‑free, long‑term stable, and delivered with a traceable calibration certificate – guaranteeing top quality.

Why the COMET T5540 is the professional CO₂ WebSensor:

• Dedicated CO₂ measurement – 0 to 5000 ppm
• High‑precision NDIR sensor – dual‑wavelength & aging compensation
• Ethernet interface – direct network connection
• COMET Cloud included – 3 months free, then affordable credit
• Protocols: Modbus TCP, SNMP, JSON, XML – open to third‑party systems
• LED indicator – color signal for quick visual reference
• Integrated display – real‑time values immediately visible
• Remote alarm function – E‑mail, SNMP Trap, Syslog
• IP30 protection – for indoor environments
• 3‑year warranty

Technical data T5540:

• CO₂ measuring range: 0 to 5000 ppm
• CO₂ accuracy: ±(50 ppm + 3 % of reading) at 25 °C and 1013 hPa
• Resolution: 1 ppm
• Measurement interval: 15 s
• Interface: Ethernet (RJ45)
• Cloud: COMET Cloud (3 months free)
• Protocols: WWW, Modbus TCP, SNMPv1, SOAP, XML
• Alarm protocols: E‑mail, SNMP Trap, Syslog
• Power supply: 9–30 V DC (PoE optional)
• Operating temperature: –30 to +60 °C
• Protection class: IP30
• Dimensions: 88.5 × 72.5 × 39.5 mm
• Weight: approx. 140 g
• Warranty: 3 years

Perfectly suited for:

• Schools, kindergartens & lecture halls
• Offices & open‑plan offices
• Conference & meeting 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 network and power cables, assign an IP address via DHCP or set it statically – done. The integrated web interface guides you through setup. With COMET Cloud, you’ll be online within seconds – no server required.

Summary:

• CO₂ WebSensor for reliable carbon‑dioxide measurement
• Remote alarm functionality
• Multi‑stage adjustment process for CO₂ and temperature ensures stable accuracy across the entire temperature range
• Essential for process control and outdoor applications
• Dual‑wavelength NDIR measurement automatically compensates for sensor aging
• The CO₂ module is highly resistant to contamination, maintenance‑free, and provides excellent long‑term stability
• CO₂ concentration is displayed or indicated via a colored LED

Scope of delivery:

• T5540
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration
• COMET Cloud for 3 months
• Power adapter not included