Thermalert 4.0

Category: Thermalert 4.0 series/Fluke Process Instruments

Key features

Thermalert 4.0 infrared sensor (Thermalter series)
Thermalert 4.0 infrared sensor
  • Conforms to Industry 4.0 standards
  • Integrated laser sighting
  • Galvanic isolated outputs
  • Plastic lens option for food application
  • Analog input for ambient compensation and adjusting emissivity setting
  • USB for easy setup
  • Simple, two-wire or digital installation
  • Backward compatibility to old Raytek® and Ircon® in class sensors and accessories
  • Fieldbus interface options: Ethernet, EtherNet / IP and PROFINET IO
  • 1M & 2M Devices CQI-9 Rev. 4 conform

Technical Specifications

  • Wide temperature ranges from -40 °C to 2300 °C (-40 ºF to 4172 °F)
  • Advanced signal processing
  • Wide choice of focus distances

Product overview

The Thermalert 4.0 series of integrated infrared temperature sensors provide accurate temperature measurement for a wide variety of process control applications. These pyrometers conform to Industry 4.0 standards, combine innovative digital technology and standard two-wire installation for all setups. With various types of communications, the Thermalert 4.0 IR sensor with laser aiming, provides the features you need to control your process in a compact, integrated package that is easy to install and operate.


DataTemp® Multidrop software provides you with the tools you need to configure your sensors - then monitor temperatures on a real-time graphical display. The bar graph feature shows temperature profiles across a web or at various spots along a process. Use the program to record and archive your process temperatures. High and low alarms are shown, making it easy to identify out of range conditions.


A wide variety of options and accessories are available to customize the installation of your Thermalert 4.0 sensors. Lens protectors and air purge collars offer protection in harsh environments. The water-/air-cooled housings can be specified for operation in ambient temperatures up to 175°C (315°F). For extremely harsh environments, the ThermoJacket is recommended. This rugged cast aluminum housing protects the sensors in ambient temperatures to 315 °C (600 °F). It completely encloses the sensor, combining thermal and mechanical protection with air purging of the lens. The Thermalert 4.0 sensor can be installed or removed while the ThermoJacket is in its mounted position.

Model overview
Spectral response
Temperature range Optical resolution Applications
8...14 µm
-40...1000°C up to 70:1 Low temperature applications, such as thick plastics, asphalt, carpeting, coated paper, thermoforming and food
5,0 µm
250...2550°C up to 70:1 Glass surface temperature for bending, tempering, annealing and sealing
7,9 µm
300...900°C up to 70:1 Ultra-thin drawn glass
3,43 µm
25...450°C 20:1 Extrusion and converting of thin films: polyethylene, polypropylene, and polystyrene
7,9 µm
10...360°C 33:1 Production and converting of films of polyester (PET), fluoroplastic, Teflon®, acrylic, nylon (polyamide)
3,9 µm
200...2250°C up to 70:1 Furnace refractory, flame hardening and brazing
2,2 µm
500...2000°C 60:1 Ferrous and nonferrous metals, induction heating, furnaces, laboratory research
1,0 µm
500...2300°C 150:1 Semiconductor, metals forging, molten glass
1,6 µm
250...1400°C 150:1 Non ferrous and unoxidized metals, galvanizing lines and steel annealing
2,3 µm
100...600°C 70:1 Rolling mills, wire coating and annealing, laser welding, plastic tubing extensions