In modern IT infrastructures, production environments, and office buildings, precise control of climate data plays a crucial role. The Web-Thermo-Hygrometer SPE from Wiesemann & Theis combines advanced measurement technology with state-of-the-art network communication, providing a future-proof solution for temperature and humidity monitoring. With innovative Single Pair Ethernet (SPE) technology, data is transmitted efficiently and reliably – with minimal cabling and without complex infrastructure requirements. This solution enables real-time measurements and seamless integration into modern monitoring, IoT, or building automation systems.

The device combines a high-precision temperature sensor with stable humidity measurement technology to consistently record all climate variables. These values can be visualized locally or accessed worldwide via the cloud. Thanks to standard protocols such as MQTT, HTTP, or TCP, the system can be easily integrated into existing platforms and automation systems. The intuitive web interface allows graphic visualization of trends and events without additional software installation. Thus, the Web-Thermo-Hygrometer SPE provides both professionals and beginners with easy access to precise climate data.

With a wide temperature measuring range from ‑40 °C to +85 °C and a humidity range from 0 to 100 % RH, the device is universally applicable – from server room monitoring to production halls and archive storage environments. At the same time, the SPE connection supports energy-efficient data transmission with minimal power consumption, emphasizing sustainability and Green IT. Through integration with the W&T Cloud, a globally accessible and secure monitoring system is available that stores and organizes all measurements long-term.

This combination of precision, scalability, and energy efficiency makes the Web‑Thermo‑Hygrometer SPE one of the most advanced devices in the field of digital climate monitoring. It fulfills Industry 4.0 requirements through standardized communication interfaces and the ability to interact directly with other IoT systems. In short: the device combines physical measurement precision with digital intelligence.

Technical Innovation through Single Pair Ethernet

The foundation of the system is Single Pair Ethernet – a future-oriented technology that transmits both data and power via a single twisted pair. This reduces cabling effort by up to 50 percent compared to traditional Ethernet installations and enables high transfer rates over long distances. For buildings with complex infrastructure or large server networks, this offers significant cost advantages and greater flexibility in planning and installation.

The device connects directly to an SPE network via a 3‑pole screw terminal. This simplifies initial installation and makes maintenance significantly more cost‑efficient. Additionally, it supports Power over Data Line, eliminating the need for a separate power source. In many applications – for example in server rooms, control cabinets, or automated production lines – this proves to be a major advantage over conventional sensor solutions.

Precise Measurement of Temperature and Relative Humidity

The Web‑Thermo‑Hygrometer SPE operates with high‑resolution sensor technology. Its measurement electronics record temperature and humidity in real time, delivering stable and reproducible readings. The humidity sensor is temperature‑compensated, providing accurate results even in harsh conditions and rapid temperature fluctuations. The long‑term stability of the sensors reduces calibration intervals and operating costs. Measurement errors remain minimal – allowing reliable data even in critical applications such as clean rooms or storage areas.

As a result, the Web‑Thermo‑Hygrometer SPE is ideal for companies that demand high data quality standards. Application areas range from temperature‑sensitive industrial processes to room climate control in smart buildings. Through its web interface, the device provides clear information on current status, history, and alarms in structured graphs. This data can be downloaded at any time or synchronized with the cloud.

Cloud Integration and Data Security

Integration with the W&T Cloud offers a major advantage: measurement data is automatically stored, visualized, and made accessible worldwide. Users can define thresholds for temperature and relative humidity and receive instant notifications via push message or e‑mail when these are exceeded or undercut. Through the MQTT protocol, IoT devices can also be automatically controlled or internal scripts triggered.

All communication processes are encrypted and meet current security standards. The cloud offers extensive user management options and monitors device integrity, system status, and measurement accuracy. For organizations with high compliance requirements, this enables full auditability of environmental conditions.

Technical Specifications of the Web‑Thermo‑Hygrometer SPE

• Temperature measuring range: -40 °C to +85 °C (non-condensing)
• Humidity measuring range: 0 to 100 % RH (relative), high long-term stability
• Connection: Single Pair Ethernet via 3‑pole screw terminal
• Protocols: HTTP, TCP, MQTT, REST API
• Alerts: MQTT events, push notifications via ntfy.sh, e‑mail
• Data storage: Local up to 2 days, cloud unlimited
• Synchronization: Integrated RTC with time synchronization via time server
• Accuracy: ±0.3 °C (temperature), ±2 % RH (humidity)
• Certification: EN 61000‑6‑2, EN 55032 Class B
• Power supply: Power over Data Line (SPE) – no separate power source required

Practical Application Scenarios

• Server and technical rooms: Preventive protection against overheating and condensation through continuous temperature and humidity monitoring.
• Offices and administration: Optimized climate control for greater comfort and energy savings.
• Industrial facilities: Precise monitoring of production conditions to ensure product quality.
• Healthcare and pharma: Reliable compliance with climate conditions in laboratories or medicine storage rooms.
• Transport and storage: Long-term monitoring of cold logistics and storage conditions.
• Research and education: Accurate measurement of climate parameters in test environments or laboratories.
• Green IT projects: Energy management through temperature trend analysis and optimization of cooling systems.
• Archiving and museums: Early warning function against high humidity to protect valuable collections.

Key Performance Features

• High measurement accuracy with minimal wiring effort
• Modern SPE technology for simplified installation
• Web-based configuration and visualization without software
• MQTT integration for flexible IoT monitoring
• Alerts via cloud, ntfy.sh, or e‑mail
• Long-term stable sensors with low maintenance requirements
• Energy-efficient operation for sustainable IT infrastructure
• Robust industrial housing with high electromagnetic resilience
• Compliance with all EMC requirements according to EN standards
• Five-year manufacturer warranty for long-term reliability

Everyday User Benefits

In server rooms, the device enables continuous climate monitoring to detect temperature spikes and humidity rises early. Offices benefit from stable climate conditions, enhancing comfort while reducing energy consumption for heating and cooling. In industrial environments, it provides reliable ambient data for digital quality assurance systems. Thanks to open interfaces, programming can be customized and integrated into existing IoT infrastructures.

Optimization Tips for Users

• Install the device in the center of the room for homogeneous measurements.
• Define individual alarm levels for different humidity thresholds.
• Combine the device with other IoT sensors for complex monitoring scenarios.
• Regularly export collected data for long-term analysis.
• Synchronize the internal clock regularly with NTP servers for accurate timestamps.
• Use the W&T Cloud to centrally manage and monitor multiple devices.

Modern Climate Monitoring Made Easy

The Wiesemann & Theis Web‑Thermo‑Hygrometer SPE is an intelligent fusion of precision, digitalization, and sustainability. It enables comprehensive measurement and analysis of temperature and humidity values via a single network cable while ensuring maximum reliability. Whether in industry, server rooms, research facilities, or smart buildings – this device is the key to efficient and automated climate monitoring. It supports companies worldwide in saving energy, reducing costs, and extending the lifespan of their equipment. With the Web‑Thermo‑Hygrometer SPE, Wiesemann & Theis sets a new standard for networked climate monitoring of the future.