Enterprise Flasher Company

Your Traffic Safety Is Our Business




Pavement temperature is an important variable to measure during winter weather events and helps decision-makers determine when pavements will freeze. Vaisala's thermo-Q provides a non-intrusive solution for measuring pavement temperature. The thermo-Q uses infrared technology to accurately measure pavement temperature and provides stationary, single target monitoring. Vaisala also offers a cutting-edge design of the thermo-Q with adjustable features (pan and tilt) and the ability to measure multiple surface temperatures. This version is known as the thermo-Q 360.

The thermo-Q is a smart alternative to an invasive sensor that requires lane closures and cutting of the roadway. The thermo-Q is easy to install and has low maintenance requirements; maintenance personnel can be safely on the side of the road while installing or maintaining it. The sensor has the ability to be mounted on an existing road weather station or other structure where a clear, unobstructed view of the pavement is available.


  • Helps determine when the surface will freeze
  • Economical
  • Easy to install with no lane closures required
  • Low maintenance cost
  • Saves chemical
  • Use with existing SSI® Linux RWIS network


  • Remote locations
  • Bridge decks
  • Problem areas
  • Proactive anti-icing operations
  • Runways and/or taxiways


  • Non-intrusive
  • Accurate infrared sensor
  • Stationary, single target monitoring
  • Multiple surface reading available with the thermo-Q 360
  • Measures temperatures in any weather condition
  • rugged weather shield

Key Specifications

Model Numbers IRQ-2400 (thermo-Q); IRQ-2400-360 (thermo-Q 360)
Sensor Radiation pyrometer measures radiation emitted from the surface target. The measured radiation is focused onto the internal thermopile
Measuring Distance Maximum 75 feet (22.86 meters) from lens to surface
Installation Angle 30° to 85° from horizontal line
Measuring Area Diameter 2.6 feet at 33 feet (.79 meters at 10 meters)
Lateral Scan Angle 53°
Sensor Cable Length Maximum 30 feet (9.14 meters) from RPU to sensor
Power 12 VDC at 10 mA (nominal);24 VDC at 10 mA (maximum)
Surface/Operating Temperature Range -67°F to + 140°F (055°C to +60°C)
Lateral Area Diameter Maximum 33 feet (10 meters)
Optics Germanium precision lens
communication Cable Serial RS-485
Data Transmission Times Once per second (thermo-Q); 10 - 45 seconds (thermo-Q 360)
Targets 16 maximum
CE Compliant EN-61326

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