Platinum 13 wt% Rhodium wire, 0.5mm (0.02in) dia is used as thermocouples and heat flux gauges. It can be used for high temperature measurements because high cost and low sensitivity.
Costa, F. F.; Wang, G.; Costa, M. Combustion kinetics and particle fragmentation of raw and torrified pine shells and olive stones in a drop tube furnace. Proc. Combust. Inst. 2015, 35 (3), 3591-3599..
Costa, F. F.; Costa, M. Particle fragmentation of raw and torrefied biomass during combustion in a drop tube furnace. Fuel 2015, 159, 530-537.