Web Thermometer Relay

Precise Temperature Monitoring and Control with the Web Thermometer Relay from Wiesemann & Theis

In a connected world where precise monitoring and control of environmental conditions are crucial, the Web Thermometer Relay from Wiesemann & Theis offers an innovative solution. This advanced measuring device records temperatures with high accuracy and makes the values available over a network. A unique feature is the integrated digital solid-state relay output, which enables automatic switching of devices when threshold values are exceeded.

With an integrated data logger, comprehensive network services, and a user-friendly interface, the device is ideal for use in server rooms, industrial environments, and offices. This article highlights the technical features, application possibilities, and benefits of this versatile device, which combines temperature monitoring with relay switching to meet the requirements of Industry 4.0.

Accurate Measurements with Pt100 Sensor

The Web Thermometer Relay is equipped with a high-quality Pt100 sensor that measures temperatures in the range of -50 °C to +180 °C (with W&T sensors). The measuring input supports an extended range of -200 °C to +650 °C, making the device suitable for a wide variety of applications, from server room monitoring to industrial process control. The Pt100 sensor is known for its high accuracy and stability, providing precise temperature data that is essential for preventing equipment damage and improving energy efficiency. The ability to switch the relay output at temperature thresholds enables direct control of devices such as fans or air conditioning systems, increasing operational safety.

Intuitive Operation and Network Connectivity

The Web Thermometer is exceptionally user-friendly thanks to its intuitive web interface. Users can access real-time temperature data, analyze trends, and adjust settings through a web browser without needing additional software. The graphical display of temperature trends simplifies identifying patterns and potential problems, making temperature monitoring more efficient. Seamless network integration allows for flexible integration into existing systems, making the device ideal for both experienced IT administrators and newcomers. The combination of a network thermometer and relay switching provides a unique solution for automated control tasks.

Flexible Alarm and Reporting Functions

The Web Thermometer Relay offers extensive alarm and reporting capabilities. Up to 12 individually configurable alarms can be created that automatically send notifications when defined temperature limits are exceeded. These alarms can be delivered via email, SNMP trap, or Syslog, which is especially beneficial in critical environments such as server rooms, where fast reaction to temperature fluctuations is essential. Additionally, the reporting function enables regular email delivery of temperature summaries, which can be used for audits, energy analysis, or documentation of operating conditions. The digital solid-state relay output expands functionality by automatically switching devices such as air conditioners or warning systems in case of an alarm.

Seamless Integration into Industry 4.0 and IoT

The Web Thermometer Relay is well-equipped to meet Industry 4.0 requirements. It supports modern protocols such as OPC UA, REST, and MQTT, allowing for easy integration into existing automation systems. In addition, it offers interfaces like SNMPv1, SNMPv2c, SNMPv3, Modbus TCP, OPC DA, and Sensobase for database integration via ODBC. Developers can access measurement data directly via TCP or UDP sockets to create custom solutions. The HTTP interface allows direct access to current readings, for example via JavaScript (AJAX), to dynamically embed them into other websites or applications. This comprehensive connectivity makes the device an indispensable tool for connected environments.

Long-Term Data Storage and Global Access

An integrated data logger stores temperature data for a period ranging from at least 16 weeks up to 20 years, depending on the selected storage interval (15 seconds to 1 hour). The data can be exported in various formats such as FTP, Excel files, or email attachments, enabling flexible further processing. Connection to the W&T Cloud allows worldwide access to the stored measurement data anytime, anywhere. An internal battery-backed clock ensures precise timestamps, which can be further refined by synchronization with a time server. These features ensure reliable documentation and analysis of temperature trends, which is especially advantageous for server room monitoring.

Versatile Applications

The Web Thermometer Relay is designed for a wide range of applications. In server rooms and network cabinets, it monitors ambient temperature to prevent overheating and extend hardware lifetime. The digital solid-state relay output enables automatic switching of devices such as fans, air-conditioning units, or alarm systems when temperature thresholds are exceeded, improving operational safety. In office environments, it supports optimization of climate control, increasing comfort and reducing energy costs. In industrial settings, the device is suitable for monitoring processes where precise temperature control is critical. In the context of Green IT, the Web Thermometer helps improve the efficiency of air conditioning in server rooms by providing accurate data for cooling optimization.

Flexible Power Supply and Standards Compliance

The Web Thermometer is powered via Power-over-Ethernet (PoE), supporting both phantom power over data pairs and power over unused wire pairs. Alternatively, an external power supply can be used, expanding deployment possibilities in environments without PoE infrastructure. The device is compliant for use in office and industrial environments and offers high immunity to interference according to EN 61000-6-2 as well as low emission levels according to EN 55032:2015 + A1 Class B, EN 61000-3-2, and EN 61000-3-3. These characteristics ensure reliable and interference-free operation, even in demanding environments.

Please note: No power supply is included in the delivery.

Durability and Reliability

The Web Thermometer Relay is designed for continuous operation and is delivered with a five-year warranty. Its robust design and DIN rail mounting option make it ideal for use in industrial environments. The internal clock, backed by a battery, provides precise timekeeping, optimized by synchronization with a time server. These features underline the device’s durability and reliability, even under demanding conditions.

An Indispensable Tool for Temperature Monitoring and Control

The Web Thermometer Relay from Wiesemann & Theis is a state-of-the-art solution for accurate temperature monitoring and automatic control in a wide variety of scenarios. With its Pt100 sensor, integrated data logger, and comprehensive networking capabilities, it offers a flexible and reliable solution for server rooms, offices, and industrial applications. The unique feature of the digital solid-state relay output enables automatic switching at temperature thresholds, increasing operational safety. Support for modern protocols such as OPC UA, REST, and MQTT as well as integration with the W&T Cloud makes it ideal for the needs of Industry 4.0.

Whether for optimizing energy efficiency, recording measurement data, or preventing equipment damage—this device is an indispensable tool for professional users.