The HW group temperature, humidity, and CO₂ sensor is an innovative multi‑sensor device that enables comprehensive monitoring of key indoor climate parameters. Designed for professional use in IT environments, modern office buildings, and educational institutions, this compact unit precisely measures temperature, relative humidity, and CO₂ concentration in real time. It provides the foundation for sustainable control of heating, ventilation, and air conditioning (HVAC) systems, ensuring a healthy and energy‑efficient indoor climate.

Equipped with advanced NDIR CO₂ sensing technology, the combined sensor offers reliable readings between 300 and 40,000 ppm CO₂. These precise values help optimize ventilation strategies and directly improve concentration, productivity, and overall well‑being. Whether in schools, universities, data centers, or healthcare facilities, the HW group CO₂ sensor enhances indoor air quality, reduces health risks, and supports compliance with regulatory requirements.

With a temperature measurement range from 0 to +50 °C and an accuracy of ±0.8 °C, this sensor ensures reliable control of environmental conditions. The humidity measurement range from 0 % to 95 % RH protects against air that is too dry or too humid. In IT environments, maintaining proper humidity prevents electrostatic discharge and corrosion damage to sensitive hardware.

Integration is straightforward via RJ11 (1‑Wire UNI), using a single cable for both power and data transmission. This allows the sensor to be quickly connected to devices such as HW group Poseidon2, Ares, or STE2 R2, making it ready for operation immediately. The compact design and lightweight IP30 plastic housing with a 3 m cable simplify installation on walls, ceilings, or desktops.

Technical Specifications of the HW group Multi‑Sensor

• Temperature range: 0–50 °C (±0.8 °C)
• Humidity range: 0–95 % RH
• CO₂ range: 300–40,000 ppm
• NDIR technology for precise CO₂ measurement
• Interface: RJ11 (1‑Wire UNI)
• IP30 plastic housing, compact size
• Includes 3 m RJ11 cable
• Easy wall, ceiling, or tabletop mounting

Integration with HW group Monitoring Systems

The sensor is fully compatible with a wide range of HW group devices. Once connected to a Poseidon2, Ares, or STE2 system, it is automatically detected and operational. Users can configure individual thresholds and alarms via the web interface. When defined limits are exceeded or undershot, the system sends notifications via email, SMS, or SNMP trap to prompt immediate corrective action.

When connected to the SensDesk.com IoT portal, centralized online management becomes possible. Users can consolidate data from multiple locations, analyze historical readings, and generate air quality reports. These features are particularly valuable for large building management systems or organizations operating across several sites.

Typical Applications

• Data center monitoring to prevent climate‑related hardware damage
• Building management for intelligent HVAC control
• Schools and universities – maintaining healthy learning environments through air quality control
• Medical institutions – ensuring optimal climate conditions for staff and patients
• Residential buildings – improving comfort and energy efficiency

Practical Benefits

• Combined measurement of temperature, humidity, and CO₂
• Improved indoor air quality for enhanced health and productivity
• Flexible use in IT, education, healthcare, and residential environments
• Simple integration into the HW group monitoring ecosystem
• NDIR technology for long‑lasting and precise CO₂ detection
• Real‑time alarm notifications via email, SMS, or SNMP

Real‑Time Monitoring for Energy Efficiency

Through direct RJ11 connectivity, the sensor continuously transmits data to the monitoring system. HVAC systems can then automatically adjust operation based on real‑time readings, reducing energy consumption and operational costs. In schools, for example, cooling and ventilation can be reduced at night while automatically increasing during daytime when CO₂ levels rise.

The HW group temperature, humidity, and CO₂ sensor is a professional solution for indoor air quality monitoring. Its precise measurement of temperature, humidity, and CO₂, combined with simple integration into existing HW group systems and reliable NDIR technology, make it an ideal choice for modern building automation. Operators of data centers, educational facilities, healthcare institutions, and residential buildings gain a reliable, energy‑saving, and health‑enhancing monitoring tool.