Industrial Automation

Ethernet Sensors for Temperature, Humidity, Pressure and CO₂ with OPC UA and MQTT

Measure temperature, humidity, air pressure and CO₂ and send the values directly to OT and IT systems. W&T industrial Ethernet sensors provide measured values via OPC UA, MQTT, REST API and Modbus TCP. Built-in data logging stores measurements locally during communication outages, while alarms and reporting functions help you react quickly when a configured limit is exceeded.

Temperature, humidity, pressure and CO₂ OPC UA, MQTT, REST API and Modbus TCP Built-in data logger Alarms, e-mail and SNMP FOXON implementation and support
Help with sensor selection

What do you need to measure, and where should the data be sent?

We will discuss the measured variables, required accuracy, number of measuring points, installation location, data-logging interval, communication protocol, alarms, calibration and connection to SCADA, MES, a database or cloud platform.

Help me choose a sensor
More about industrial Ethernet sensors, data logging and communication

Environmental measurements directly on the Ethernet network

W&T sensors combine measurement, local data logging, a web interface and standard industrial communication in one compact device. The measured values can be displayed in a browser, stored in internal memory and transferred to SCADA, MES, ERP, databases, monitoring systems or cloud applications without an additional PLC.

1. Measurement Temperature, humidity, pressure or CO₂

A connected Pt100, Pt1000 or NTC sensor, or an integrated environmental sensor, continuously measures the selected variable.

2. Local processing Ethernet sensor and data logger

The device evaluates the value, stores the measurement locally and checks configured alarm limits.

3. Communication OPC UA, MQTT, REST and Modbus TCP

Standard interfaces make the data available to industrial, building-management and IT applications.

4. Data use SCADA, MES, databases, BI and cloud

Monitoring, trends, reporting, energy management, quality control, alerts and long-term analysis.

Which variables can be measured?

Temperature Pt100, Pt1000 and NTC sensors

Select one, two or eight measuring points according to the application, installation and required temperature range.

Temperature and humidity Thermo-hygrometers

Monitor the indoor environment, storage conditions, condensation risk and the operation of technical rooms.

Air pressure Thermo-hygro-barometer

Measure temperature, relative humidity and atmospheric pressure in one device for environmental monitoring.

High accuracy Precision temperature and humidity

Suitable for demanding applications where higher measurement accuracy and documented monitoring are required.

Air quality Carbon dioxide concentration

Monitor CO₂ concentration in production halls, laboratories, offices, warehouses and other enclosed spaces.

Multiple measuring points Up to eight temperature inputs

Monitor several cabinets, rooms, machines or measuring locations using one Ethernet device.

What can the sensors do with the measured data?

Live values Continuous measurement and trends

Current measured values and trends can be viewed directly through the device web interface.

Data logging Internal measurement archive

The built-in data logger retains values locally, helping to prevent data loss during a network or server outage.

Alarms Reaction to exceeded limits

Selected models support e-mail notifications, reporting functions, SNMP polling and alarm traps.

Integration Direct connection to OT and IT systems

OPC UA, MQTT, REST API and Modbus TCP simplify integration without proprietary middleware.

Power supply PoE or external DC supply

Depending on the model, the device can be powered through Ethernet or from an external power supply.

Documentation Optional calibration

Selected measuring solutions can be supplied with factory or accredited calibration for documented measurement traceability.

Typical applications

Production halls and warehouses

Monitor storage and production conditions, identify temperature fluctuations and document the environment over time.

Server rooms and network cabinets

Detect overheating, insufficient cooling, high humidity or unfavourable environmental conditions.

Laboratories and quality control

Record environmental values for process documentation, testing and quality requirements.

Electrical cabinets and machines

Monitor temperatures inside cabinets, near power electronics or at selected machine locations.

Buildings and technical rooms

Measure indoor climate and air quality and provide the values to BMS or monitoring applications.

Cloud and central reporting

Send measurements by MQTT or REST API to dashboards, cloud applications and central analytical systems.

Available communication interfaces

Interface Typical purpose Suitable target system
OPC UA Standard industrial data access SCADA, HMI, MES and OPC clients
MQTT Publishing measurements to a broker IoT platforms, cloud and dashboards
REST API Reading values from web applications Custom software, web and IT integration
Modbus TCP Simple industrial communication PLC, SCADA, gateways and controllers
Web interface Configuration, live values and trends Browser-based local administration
Internal data logger Local storage of measurements Data recovery and long-term documentation

Select the right sensor

Temperature 1× Pt100 / Pt1000 via connector

One external resistance temperature sensor connected through a plug connector.

View Pt100 / Pt1000 thermometer
Temperature 1× NTC via connector

Compact Ethernet thermometer with an external NTC temperature sensor.

View NTC thermometer
Temperature 1× Pt100 / Pt1000 via terminal block

One resistance temperature input connected directly to a terminal block.

View 1-channel thermometer
Two temperatures 2× Pt100 / Pt1000

Monitor two independent measuring points using one Ethernet thermometer.

View 2-channel thermometer
Multiple temperatures 8× Pt100 / Pt1000

Central temperature monitoring for up to eight independent measuring points.

View 8-channel thermometer
Temperature and humidity Ethernet thermo-hygrometer

Combined environmental monitoring of temperature and relative humidity.

View thermo-hygrometer
Temperature, humidity and pressure Ethernet thermo-hygro-barometer

Three environmental variables measured and communicated by one device.

View thermo-hygro-barometer
High accuracy Precision thermometer and hygrometer

High-precision temperature and humidity monitoring for demanding applications.

View high-precision sensor
Air quality Ethernet CO₂ sensor

Measure carbon dioxide concentration and provide the values to monitoring and OT/IT systems.

View CO₂ sensor
Complete sensor or Ethernet I/O module?

Choose a complete Ethernet sensor when you need a ready-to-use solution for temperature, humidity, pressure or CO₂. When you already have an analogue or digital sensor and only need to connect its signal to Ethernet, see OPC UA / MQTT I/O modules .

How can FOXON help?

  • We select the correct measured variable and sensor type.
  • We determine the required number of measuring points.
  • We check the measurement range, accuracy and installation conditions.
  • We recommend OPC UA, MQTT, REST API or Modbus TCP.
  • We assist with data logging, alarm limits and notifications.
  • We design the connection to SCADA, MES, databases or cloud.
  • We help with calibration requirements and documentation.
  • We provide commissioning, training and technical support.
Official distribution and technical support: FOXON is the official W&T distributor for the Czech Republic and Slovakia. We help you select, configure and integrate industrial Ethernet sensors into higher-level OT and IT systems.

Question or Inquiry

Are you looking for a spare part, a repair, one of our products, or do you need to check availability or get advice on a technical solution? Send us the order number, a photo of the nameplate, or a brief description of your request. We will usually get back to you within one hour during business hours.

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