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FRC Fuji Electric temperature transmitter with industrial housing and front display mounted in field configuration

FRC Fuji Electric temperature transmitter with industrial housing and partially dimmed front display on a light background

Industrial temperature measurement

Temperature measurement is essential for monitoring, controlling, and ensuring the safety of industrial processes. Fuji Electric offers a comprehensive range of temperature measurement devices...

Temperature measurement is essential for monitoring, controlling, and ensuring the safety of industrial processes. Fuji Electric offers a comprehensive range of temperature measurement devices, transmitters, signal converters, indicators, and sensors designed for demanding environments.Temperature measurement is used in numerous industrial applications: process control, energy monitoring, plant safety, quality traceability, thermal regulation, and equipment monitoring. To obtain a reliable temperature reading, it is essential to select a device suited to the process, the fluid, the temperature range, the environment, and the monitoring system in use.A temperature measurement system is not limited to the sensor alone. It may include an industrial temperature probe, a transmitter, a temperature converter, a local indicator, a digital display, or a signal conditioner. The objective is to measure temperature, convert the signal from the field, and then transmit actionable information to a PLC, a DCS, a data logger, or a control system.

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Temperature transmitter - FRC
Ref: FRC
Retail price
depending on configuration
567,00 €
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DIN-rail analog signal converter - type B3
Ref: B3
Retail price
depending on configuration
260,00 €
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HART® din rail analog signal converter - type B3HU
Ref: B3HU
Retail price
depending on configuration
338,00 €
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Universal transmitter - type M3
Ref: M3
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depending on configuration
307,00 €
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Galvanic insulator - TYPE M6
Ref: M6DSN
Retail price
depending on configuration
205,00 €
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Sensor head temperature converter - type 27
Ref: 27U
Retail price
depending on configuration
166,00 €
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Analog temperature converter HART® sensor head - type 27HU
Ref: 27HU
Retail price
depending on configuration
276,00 €
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PT100 temperature probe
Ref: PT100

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Thermocouple temperature probe

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Thermowell
Ref: D7

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Technologies

PT100 temperature probe
A range of resistance thermometers and PT100 temperature sensors, custom-built from single units to small series, adapted to your specific needs.
Thermocouple probe
Looking for a thermocouple probe? We manufacture probes for temperature measurement with a high degree of accuracy and stability.
PT100 table
Find out how to read a table of ohmic values as a function of temperature, and the importance of this data in industrial applications.
Signal conditioners
Isolate, convert, amplify a field signal from your sensors or manage your alarms and regulation with Fuji Electric signal converters.
Field mounted HART temperature transmitter
Convert and display your temperature measurement into a current output signal with Fuji Electric's HART temperature transmitter indicator.
Digital panel meter
Visualize and measure your industrial process with ease! Our most comprehensive range of digital displays covers a variety of physical measurements.

Industrial temperature measurement: a comprehensive buying guide

A safety helmet-wearing technician checking a tablet at an industrial facility with piping and process equipment

In industrial processes, temperature directly affects product quality, equipment safety, energy consumption, and operational stability. Reliable temperature measurement enables control of heating, cooling, chemical reactions, sterilization, combustion, steam generation, and control loops.

Choosing a temperature measurement device involves more than just selecting a sensor.

Whether you want to measure ambient temperature, air temperature, or the temperature of a liquid, gas, steam, solid, or industrial furnace, it is essential to choose a measuring device suited to the operating conditions and the required level of accuracy. Depending on the application, an industrial thermometer, transmitter, or converter may be used to obtain reliable measurements. The entire measurement chain must be taken into account: the measurement point, the signal type, conversion, transmission, display, compatibility with automation systems, and installation conditions. An industrial temperature sensor must provide stable, accurate, and actionable data, even in harsh environments.

What is temperature measurement?

Digital interface displaying a temperature trend graph with a hand interacting with a touchscreen

Temperature measurement is one of the most important physical parameters in industry. It enables process control, optimizes energy consumption, ensures product quality, and guarantees plant safety.

Temperature measurement involves determining the thermal value of a medium, fluid, surface, material, or piece of equipment. In industry, this measurement is used to monitor a process, control a system, protect a facility, or ensure production compliance.

The measured temperature may come from a liquid, a gas, steam, a furnace, a pipe, a tank, a heat exchanger, or mechanical equipment. Depending on the industry, temperature can be measured in liquids, gases, solids, ambient air, or even the ground. Each application requires a suitable measurement method to ensure accurate and reproducible readings. In addition, the measurement can be taken locally, transmitted remotely, recorded, displayed, or integrated into an automated control loop.

Insulated industrial pipe equipped with sensors and measuring instruments on a process line labeled "Primary Air"

Temperature is generally expressed in degrees Celsius (°C), the most commonly used unit in industry, in accordance with the International System of Units (SI). Some scientific applications also use the kelvin (K), which is defined as absolute zero—the theoretical temperature at which particle motion ceases.

A temperature measurement system generally consists of:

an industrial temperature sensor or probe;
a connection to the process;
a transmitter or converter;
a standardized output signal;
a display, monitoring, or control system.

The goal is to convert a physical quantity—temperature—into information that is reliable, easy to read, and usable by the operator or the control system.

Why is temperature measured in industrial settings?

Two personal protective equipment technicians analyzing data on a tablet during a service call at an industrial facility

Temperature measurement plays a central role in industrial process control. Temperatures that are too high, too low, or unstable can lead to a decline in quality, excessive energy consumption, premature equipment wear, or safety hazards.

In industrial settings, temperature measurement is used, among other things, to:

manage manufacturing processes;
monitor chemical reactions;
control heat transfer;
protect machines from overheating;
optimize energy efficiency;
ensure the quality of the finished products.

In demanding industrial environments, temperature measurements must remain stable despite vibrations, humidity, rapid fluctuations, mechanical stress, or hazardous atmospheres.

How does a temperature measurement chain work?

Industrial control cabinets installed on a production line with stainless steel tanks, piping, and process equipment

The principle remains the same regardless of the type of instrument: a sensor detects a change in temperature and converts it into a usable signal.

Depending on the method used, the measurement can be performed:

through contact with the process;
by detecting thermal radiation;
by varying the electrical resistance;
by the thermoelectric effect.

The resulting data is then converted and transmitted to a PLC, a supervisory control system, or a digital display. This feature ensures reliable transmission of temperature values to control systems.

An abstract illustration of glowing dots forming waves that evoke a digital visualization of temperature data

The accuracy of the measured temperature depends on many factors:

the location of the measurement point;
the process temperature;
atmospheric pressure or process pressure, depending on the application;
the fluid flow velocity;
the presence of vibrations;
the sensor's response time.

What devices can be used to measure temperature?

There are several types of devices used to measure temperature. The choice of device depends on the process constraints, the desired performance, and the expected features, such as digital communication, a local display, or diagnostic functions.

Industrial temperature transmitter with digital display and blue field housing for process installations

Temperature transmitters

Temperature transmitters measure, convert, and transmit signals from resistance probes or thermocouples to digital or analog devices. They may include a local display, HART communication, configuration functions, and diagnostics.

They are particularly well-suited for applications where signal reliability, measurement accuracy, and integration with automation systems are essential.

Connection head for a temperature transmitter with six screw terminals labeled "Supply" and "Input"

Temperature converters

Temperature converters are used to convert a field signal into a standard signal. They allow a temperature measurement to be adapted for use with a PLC, a supervisory control system, or a data logger.

They are useful when the sensor signal needs to be isolated, amplified, linearized, or converted to ensure reliable transmission.

DIN-rail electronic modules for conditioning and transmitting measurement signals in industrial environments

Signal conditioners

Signal conditioners provide galvanic isolation, amplification, conversion, or protection for signals from industrial sensors. They improve signal quality and ensure reliable transmission in environments with interference.

Industrial digital display with red LEDs showing a temperature value for process control

Digital indicators and displays

Indicators allow for the local display of a measured temperature. They facilitate the operation of facilities, particularly when operators need a direct reading as close as possible to the process.

Industrial temperature probe with a blue connection head and a stainless steel thermowell

Industrial temperature probes

Probes are the components used to measure temperature. They can be used in liquids, gases, steam, furnaces, tanks, or pipes. A separate page will be dedicated to the detailed selection of temperature probe types, covering technologies, configurations, materials, and measurement ranges.

Industrial applications of temperature measurement

Temperature measurement is used across the entire industrial sector. Each sector has its own specific requirements, whether in process control, storage, the transport of fluids or goods, or the monitoring of buildings and infrastructure.

Requirements vary depending on processes, temperature levels, safety constraints, and traceability needs.

Network of insulated piping and process equipment in an industrial facility for fluid transport

Chemical and petrochemical industry

In chemical processes, temperature directly affects reaction rate, product stability, and plant safety. Accurate temperature measurement enables the control of exothermic reactions, heat transfer, columns, reactors, and transfer lines.

Network of insulated industrial piping with a control valve and stainless steel process lines

Energy, steam, and industrial utilities

Facilities that generate power, steam, or hot water require reliable measurement to optimize efficiency, monitor equipment, and ensure the safety of systems. Temperature plays a key role in monitoring boilers, heat exchangers, turbines, cooling systems, and distribution networks.

Production floor operator monitoring stainless steel tanks at an industrial food processing facility

Food and pharmaceuticals

In the food and pharmaceutical industries, temperature determines product quality, hygiene, and compliance. It plays a role in cooking, sterilization, pasteurization, cleaning-in-place, storage, and production in controlled environments.

Industrial furnace with molten metal at high temperatures, illustrating a high-temperature thermal process in a production environment

Metallurgy, cement manufacturing, and industrial furnaces

High-temperature processes require robust equipment capable of operating in harsh environments. Temperature measurement is used to control furnaces, heat treatment processes, dryers, grinders, and combustion systems.

Hydraulic turbines in operation at a hydroelectric power plant, with water flow and industrial equipment

Water, environment, and fluid processing

Temperature affects the performance of treatment processes, the quality of related measurements, and equipment operating conditions. It is used in treatment plants, cooling systems, industrial water systems, and environmental monitoring systems.

How do you choose a temperature measuring device?

The choice of a temperature measurement device depends on several technical criteria. Making the right choice ensures the accuracy, stability, and service life of the measurement system.

Industrial electrical cabinet with a digital temperature display in front of a process facility and its equipment

Temperature range

The device must cover the entire temperature range of the process, including transient phases, start-ups, shutdowns, and any temperature spikes. A safety margin is often necessary to prevent drifts or premature degradation.

Industrial temperature probe with a blue connection head mounted on an insulated process pipe

Accuracy and stability

The required accuracy depends on the application. Critical control, quality validation, or safety measurements require greater accuracy than a simple local display. Long-term stability is also essential for reducing maintenance requirements.

Industrial temperature transmitters mounted on insulated process pipes in an industrial facility

Response time

Some applications require a rapid response to temperature changes. Others prioritize stability and ruggedness. The response time depends on the sensor, the mounting, the thermowell, the fluid, and the flow conditions.

Blue-head temperature transmitter installed on an insulated industrial pipe for process monitoring

Process conditions

Pressure, vibration, corrosion, moisture, dust, steam, explosive atmospheres, high temperatures, or cold conditions can influence the choice of equipment.

The materials, housing, connections, and protective features must be compatible with the operating environment.

Temperature transmitter with a digital display installed on an industrial pipe within a process facility

Output signal and integration

The signal must be compatible with the control system: 4–20 mA, HART, voltage, relay, digital communication, or local display. Converters and transmitters allow temperature measurements to be adapted to existing automation architectures.

A safety helmet-wearing technician adjusting an industrial controller while consulting a tablet in a storage area

Maintenance and accessibility

The system must allow for the inspection, replacement, or calibration of instruments without unnecessarily disrupting production. Sheaths, field enclosures, and configurable transmitters facilitate maintenance operations.

FAQ on temperature measurement

What device is used to measure temperature in industrial settings?

An industrial temperature measurement device can be a probe, an industrial thermometer, a sensor, a transmitter, a converter, or an indicator. In a complete system, the probe measures the temperature, and then the transmitter or converter converts the signal into information that can be used by a PLC, a display, or a supervisory control system.

Unlike thermometers intended for the general public, industrial instruments are designed to operate in demanding environments where pressure, vibration, corrosion, and temperature conditions are particularly severe.

What is the difference between a temperature sensor, a temperature probe, and a temperature transmitter?

The sensor or probe measures the temperature at the measurement point. The transmitter then converts the signal from the probe into a standard signal—such as 4–20 mA—to transmit the measured temperature to a control system. The transmitter may also provide display, configuration, and diagnostic functions.

How do you choose a temperature sensor?

When selecting a sensor, you must consider the temperature range, the required accuracy, the fluid being measured, the pressure, the environment, the response time, the mounting type, and the required output signal.

Why use a temperature converter?

A temperature converter is used to adapt the signal from a probe or sensor to a PLC, DCS, display, or data acquisition system. It can convert, isolate, amplify, or linearize the signal to ensure a more reliable measurement that is easier to interpret.

How Can You Ensure the Reliability of an Industrial Temperature Measurement?

To ensure the reliability of a temperature measurement, you must select a device suitable for the application, install the measurement point correctly, protect the sensor if necessary, use a signal compatible with the control system, and schedule periodic calibration. The quality of the wiring, signal isolation, and protection against electrical interference are also important.

In which industries is temperature measurement used?

Temperature measurement is used in the energy, chemical, petrochemical, food processing, pharmaceutical, metallurgical, and water treatment industries, as well as in industrial utilities, furnaces, boilers, steam systems, cooling systems, and manufacturing processes that require precise thermal control.

What are the units of temperature?

Temperature can be expressed in several units.

The Celsius degree (°C)

The Celsius degree is the standard unit in industry. This scale is based on two physical points:

the freezing point of water (0 °C);
the boiling point of water (100 °C) at normal atmospheric pressure.

The kelvin (K)

The kelvin is the official unit of the International System of Units. It is defined as absolute zero (-273.15 °C), the theoretical limit at which the thermal energy of particles is minimal.

Some laboratory, research, or cryogenics applications use this unit directly.

A Fuji Electric technician observing an industrial facility equipped with tanks and process piping from a walkway

Fuji Electric, your partner for temperature measurement

Fuji Electric offers a comprehensive range of industrial temperature measurement instruments: transmitters, converters, signal conditioners, indicators, displays, probes, and accessories. These solutions enable the measurement, conversion, display, and transmission of temperature in a variety of industrial environments.

Whether you're looking for a temperature measurement device for a new installation, a replacement, an automation upgrade, or a specific application, our teams will help you choose the solution best suited to your process requirements.

Our teams will help you choose the solution best suited to your application, the features you need, and the performance you expect, so you can obtain reliable temperature readings over the long term.

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