Web Thermometer 2x

Web Thermometer 2x by Wiesemann & Theis

The Web Thermometer 2x by Wiesemann & Theis is a powerful, network-enabled measuring device with two independent Pt100/Pt1000 measurement inputs for the range of -200 °C to +650 °C. It allows simultaneous acquisition of two temperature values – ideal for monitoring supply and exhaust air, indoor and outdoor temperatures, or differential temperature measurement in server rooms, production halls, and building systems.

The device features an integrated data logger with up to 20 years of storage capacity, an intuitive web interface, and modern Industry 4.0 protocols such as MQTT, REST, and OPC UA.

Thanks to Power-over-Ethernet (PoE), galvanic isolation, high noise immunity, and optional DAkkS calibration, it meets the highest standards of precision and reliability. With a 5-year warranty and extensive alarm and integration capabilities, the Web Thermometer 2x is the perfect solution for professional multi-point temperature monitoring.

Technical Highlights at a Glance

• Two independent Pt100/Pt1000 measurement inputs (-200 °C … +650 °C)
• Supplied W&T Pt100 probe: -50 °C … +180 °C (1 piece included)
• Integrated data logger: min. 16 weeks to max. 20 years
• PoE (Class 1) or external power supply 12–48 V DC
• Support for MQTT, REST, OPC UA, Modbus TCP, SNMP v3
• Up to 12 individual alarms per measurement input
• Dynamic integration via AJAX/JavaScript
• Optional DAkkS or ISO factory calibration with certificate
• 5-year manufacturer warranty

Two Independent Pt100/Pt1000 Inputs

The Web Thermometer 2x features two galvanically isolated measurement inputs, each supporting Pt100 and Pt1000 sensors in 2-, 3-, or 4-wire configuration.

Each input covers the full range from -200 °C to +650 °C and automatically compensates for lead resistance.

One high-quality Pt100 probe (-50 °C … +180 °C, 2 m cable) is included; the second probe can be freely selected. Typical applications include simultaneous monitoring of supply/exhaust air in HVAC systems, indoor/outdoor temperatures, or differential temperature measurement for optimizing climate control.

Powerful Data Logger and Cloud Connectivity

Both temperature channels are recorded independently. The internal data logger stores measured values depending on the sampling rate (15 s to 60 min) between 16 weeks and 20 years. The battery-buffered real-time clock remains synchronized even during power outages (NTP synchronization). Measurement data can be automatically uploaded via FTP, email attachment, or directly to the W&T Cloud – providing worldwide access to historical data at any time.

Modern Industry 4.0 Interfaces

The Web Thermometer 2x is fully prepared for Industry 4.0:

• MQTT – direct connection to IoT platforms
• REST API – easy integration into custom applications
• OPC UA – standard in industrial automation
• Modbus TCP – connection to PLC and SCADA systems
• SNMP v1/v2c/v3 – integration into existing monitoring systems
• Syslog, TCP/UDP sockets, FTP, Sensobase (ODBC)

Current measurement values from both channels can be dynamically integrated into dashboards or building management systems using JavaScript (AJAX).

Flexible Alarming – Including Differential Alarms

Up to 12 individual alarms per channel can be freely configured (threshold, hysteresis, delay). In addition, combined alarms (e.g., difference between channel 1 and 2) can be defined. When thresholds are exceeded, the device automatically sends:

• Email notifications (including periodic reports)
• SNMP traps
• Syslog messages
• MQTT publish
• TCP/UDP messages

Especially in data centers, differential temperature monitoring enables precise climate control and contributes to a Green IT strategy.

Easy Installation and Reliable Power Supply

The device is preferably powered via Power-over-Ethernet (PoE Class 1, max. 3.84 W) – ideal for cabinet or ceiling installation.

Alternatively, external power via 12–48 V DC through pluggable screw terminals is available. The RJ45 network interface is galvanically isolated (≥ 1500 V) and supports 10/100 Mbit/s with Auto-MDIX.

Standards, Calibration, and Warranty

The Web Thermometer 2x meets the highest quality standards:

• High noise immunity according to EN 61000-6-2
• Low emissions according to EN 55032:2015 + A1 Class B
• Optional ISO factory calibration or DAkkS calibration with certificate
• 5-year manufacturer warranty

Typical Applications

• Supply/exhaust air monitoring in server rooms and data centers
• Indoor/outdoor temperature measurement in building management
• Differential temperature measurement for climate optimization
• Production halls and warehouses with two measurement points
• Cooling and deep-freeze rooms
• Process monitoring using two temperature sensors
• Green IT projects and energy management

The Web Thermometer 2x by Wiesemann & Theis is the ideal solution for simultaneous, high-precision monitoring of two temperature points.

Whether used as a differential measurement device for climate control optimization, a dual-sensor setup in production, or an IoT node with MQTT and OPC UA – it stands out for its flexibility, accuracy, and long-lasting quality.

With optional DAkkS calibration, PoE power supply, and a 5-year warranty, it sets new standards in professional multi-point temperature monitoring.