Menu
Close
Close
Instruments

Absolute temperature radiation thermometer

Low uncertainty, high temperature measurement

Introduction of high temperature reference standards opens the door to low cost radiation thermometers for establishing a traceable temperature scale above 1000 °C. The Absolute Temperature-Kelvin (AT-K) radiation thermometer provides a stable base for calibration using high temperature fixed-points from 1000 °C to 2750 °C.

Key features:

  • The optics are mounted to a precision machined titanium framework.
  • Aluminium lens tubes hold the optics so that the thermal expansion is balanced to give a fixed optical path from the field stop to the Lyot stop that defines the aperture of the instrument.
  • The field stop which defines the measurement spot is low thermal expansion molybdenum.
  • Temperature sensitive components are thermally stabilised.
  • The detector is an 18 mm by 18 mm silicon photodiode with only the central 10 mm diameter used as this improves stability and linearity.
  • The amplifier is NPL designed and manufactured specifically for the detector and is based on a high quality op-amp and stable resistor pack.

High temperature blackbody sources: 1153 °C to 2748 °C

Don’t see what you are looking for? Our diverse skill set enables us to provide bespoke solutions. Please contact us to discuss your requirements.

Contact the Instruments team

Work with us

Our research and measurement solutions support innovation and product development. We work with companies to deliver business advantage and commercial success.
Contact our Customer Services team on +44 20 8943 7070