COMET H5524 – WebSensor CO₂, NDIR, 2 Relay Outputs

COMET H5524 – Ethernet CO₂ Sensor 0–5000 ppm, NDIR, 2 Relay Outputs

The COMET H5524 is a professional Ethernet CO₂ sensor with two relay outputs and an integrated NDIR module – the smart all-in-one solution for precise CO₂ monitoring and direct control in offices, schools, conference rooms, server rooms, production halls, hospitals, theatres, or any environment where air quality needs to be actively maintained.

The maintenance-free dual-wavelength NDIR sensor with multipoint calibration and patented auto-calibration measures CO₂ with exceptional precision in the range 0 to 5000 ppm (±(50 ppm + 3% of reading) at 25 °C and 1013 hPa). The sensor automatically compensates aging, requiring no field calibration, and remains stable and reliable for many years. The CO₂ concentration is shown on the integrated display or indicated by a color LED, visible at a glance. In addition, an adjustable acoustic alarm (buzzer) warns when threshold levels are exceeded.

The two relay outputs (max. 50 V / 2 A / 60 VA) can be freely configured by CO₂ thresholds – ideal for direct control of fans, humidifiers, dehumidifiers, alarms, dampers, or emergency shut-off systems. Via Ethernet (RJ45), the sensor integrates seamlessly into networks, enabling direct connection to COMET Cloud (3 months free, then 1 credit/year) for graphs, exports, alarms, and remote access via app or browser. Alternatively, Modbus TCP, SNMP, JSON, or XML can be used for integration into your own BMS/SCADA/IoT system.

The robust housing and operating temperature range of –30 to +60 °C make the H5524 a reliable partner for continuous operation, indoors or outdoors. No dedicated server is required – COMET Cloud handles all data processing and alarm management.

Why the COMET H5524 is the professional CO₂ sensor with relays:

• NDIR CO₂ sensor 0–5000 ppm – patented auto-calibration
• 2 relay outputs – 50 V / 2 A – for direct control
• Ethernet interface – direct network integration
• COMET Cloud included – 3 months free, then low-cost credit
• Modbus TCP, SNMP, JSON, XML – open to third-party systems
• Color LED + acoustic alarm – instant warning
• Integrated display – real-time value visualization
• Remote alarm function – E-mail, SNMP Trap, Syslog
• IP30 protection – for indoor use

Technical Data H5524:

• 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
• Relays: 2 × max. 50 V / 2 A / 60 VA
• 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 rating: IP30
• Warranty: 3 years

Perfectly suited for:

• Schools, kindergartens & lecture halls
• Offices & open-plan workplaces
• Conference & meeting rooms
• Server rooms & data centers
• Hospitals & medical facilities
• Production & storage halls
• Demand-controlled ventilation
• Smart building & energy management

Setup – done in minutes

Connect network and power cables, assign an IP address via DHCP or manually – done. The integrated web interface guides you through setup and relay configuration. With COMET Cloud, you are online in seconds – no server setup required.

Summary:

• CO₂ transmitter with two relay outputs
• CO₂ measurement based on dual-source dual-beam principle
• Proven non-dispersive infrared (NDIR) cell ensures long-term CO₂ measurement stability
• Patented autocalibration compensates infrared source aging, guaranteeing high reliability and long-term stability
• No regular on-site recalibration required
• CO₂ concentration displayed on-screen or indicated by a color LED

Scope of delivery:

• H5524
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration
• COMET Cloud access for 3 months