Temperature measurement systems

Radiation pyrometer

Meggitt’s radiation pyrometer is a non-intrusive sensor to directly measure the turbine blade temperature within a gas turbine engine. Meggitt’s radiation pyrometer is qualified and in service on the EJ200 engine for the Eurofighter Typhoon.

The radiation pyrometer consists of three main sections

  • radiation pyrometerThe head assembly, mounted into the engine casing, incorporates a patented purge air system to maintain lens cleanliness. This receives the infrared (IR) radiation given off by the rotating turbine blades.

  • The fiber optic bundle, made from nuclear-hard glass fibers and encased in a convoluted tube with protective stainless steel over-braid, transmits the IR signal to the electronics assembly.

  • The electronics assembly converts the IR signal into two electrical signals which are amplified, temperature compensated, and fed directly into the DECU or FADEC.

Meggitt’s radiation pyrometer is light-weight, highly accurate, and highly reliable

  • Accurate to ±4°C at 950°C (±7.5°F at 1740°F)
  • Measures blade temperature from 600°C to 1100°C (1110°F to 2010°F)
  • Removable shroud for quick lens inspection
  • Mass less than 1.2 Kg (3 lbs)