Abstract: A temperature measurement system for free turbine type gas turbine engines comprising first temperature sensing means located in the engine exhaust area for sensing the engine exhaust temperature and providing an electrical signal representative thereof. A second temperature sensing means is located in the intake area of the engine for sensing the engine intake temperature and providing a further electrical signal representative thereof. Both of these electrical signals are connected to a compensator circuit having a function to produce a resultant output signal which is directly proportional to the temperature in the inlet area of the turbine of the engine.