In IT infrastructures, industrial processes, and sensitive environments, operational safety critically depends on stable climate conditions. The Wiesemann & Theis Web‑Thermo‑Hygrobarometer delivers precise measurements for temperature, humidity, and air pressure – combined in a single network‑enabled measuring device. Through integration into modern Industry 4.0 and IoT environments, it provides a continuous overview of critical climate parameters in real time, even across distributed locations.

This multifunctional monitoring system offers a wide temperature range from ‑40 °C to +85 °C, measures relative humidity between 0 and 100 % RH, and simultaneously records air pressure values in the range of 10 to 1100 hPa. With automatic dew point detection, the device identifies condensation risks early – a crucial advantage for preventing damage to IT hardware, production equipment, or stored goods.

Thanks to integrated W&T Cloud connectivity, all measurements are stored centrally and can be accessed worldwide. Flexible network protocols such as MQTT, OPC UA, and REST simplify integration into existing monitoring and automation systems. With a battery‑backed real‑time clock and long‑term data logging functions, the device provides full transparency over current conditions and historical developments – for periods ranging from weeks to several decades.

Precision Sensors for Three Core Climate Parameters

The Web‑Thermo‑Hygrobarometer integrates three highly accurate sensors in one system:

• Temperature sensor: Measures values between ‑40 °C and +85 °C with high resolution.
• Humidity sensor: Records relative humidity from 0 to 100 % RH (non‑condensing), temperature‑compensated for reliable readings.
• Air pressure sensor: Precise measurement of atmospheric pressure in the range 10 to 1100 hPa, essential for process, environmental, and meteorological applications.

This combination covers a wide range – from server room monitoring to industrial process climate control, to environmental data acquisition and scientific research. Dew point calculation complements these readings and provides another critical measurement for preventive moisture protection.

Integrated Network Technology and IoT Compatibility

As a fully network‑enabled device, the Web‑Thermo‑Hygrobarometer supports standard IoT and industrial protocols:

• MQTT: For real‑time transmission in IoT architectures.
• OPC UA: Compatible with Industry 4.0 and SCADA environments.
• REST API: Direct access to raw data for custom applications.
• Modbus‑TCP and SNMP: For industrial control and network integration.

These interfaces can be quickly configured via the intuitive web interface. Developers also have access to HTTP and TCP/UDP sockets as well as export options via FTP or ODBC. The device can thus be operated as a standalone monitoring solution or integrated directly into higher‑level control systems.

Data Logger and Long‑Term Archive

The integrated data logger of the Web‑Thermo‑Hygrobarometer stores measurements for periods ranging from 7 weeks to 20 years, depending on the configured logging interval. Complete documentation is especially important for:

• Quality management in production and storage
• Audit and compliance verification
• Long‑term climate analysis for energy optimization

The battery‑backed clock ensures that timestamps remain precise even during power or network outages. This guarantees reliable and audit‑ready datasets.

Technical Specifications

• Temperature range: ‑40 °C to +85 °C
• Humidity range: 0–100 % RH (non‑condensing)
• Air pressure range: 10–1100 hPa
• Dew point measurement: Integrated for condensation protection
• Data logger: Records from 7 weeks to 20 years
• Protocols: OPC UA, REST API, MQTT, SNMP, Modbus‑TCP
• Interfaces: HTTP, TCP/UDP sockets, Sensobase, ODBC
• Alarms: Up to 12 definable thresholds
• Mounting: DIN rail or wall mounting
• Power supply: PoE or external power adapter
• Certifications: EN 61000‑6‑2, EN 55032 Class B

Practical Application Areas

• Server room monitoring: Prevents overheating, moisture, or pressure damage.
• Industrial manufacturing: Controls climate conditions for quality assurance.
• Office and administrative buildings: Optimized climate for comfort and energy efficiency.
• Green IT: Provides data for demand‑driven cooling and reduced energy consumption.
• IoT networks: Integration into smart building or SCADA systems.
• Meteorology & research: Combined climate and air pressure data collection.
• Storage of sensitive goods: Moisture protection in archives, museums, or pharmaceutical storage.

Advantages at a Glance

• Combined measurement of temperature, humidity, and air pressure
• Real‑time data access via web interface and APIs
• Multiple alerting options for quick response
• Long‑term storage and audit‑compliant data recording
• Easy integration into IoT and automation systems
• Energy‑efficient through PoE
• Standards‑compliant and interference‑resistant for industrial environments
• Five‑year warranty and robust design

Tips for Optimization

• Place the device centrally to provide representative readings for all parameters.
• Define combined alarm limits (e.g. dew point + air pressure) for complex scenarios.
• Perform regular data backups and exports to analyze trends.
• Integrate the system into automated controls via MQTT.
• Conduct annual sensor checks or calibration.

High‑Precision Multitool for Climate Monitoring

The Wiesemann & Theis Web‑Thermo‑Hygrobarometer is a complete system for comprehensive measurement and monitoring of essential climate parameters. With precise measurement of temperature, humidity, and air pressure, flexible network connectivity, cloud integration, and dew point calculation, it meets the highest standards in IT, industry, and facility management. Its robust construction, long‑term data storage, and ease of use make it an indispensable tool for any application requiring safe and efficient climate monitoring.