Film thermocouples as the most effective tool are used to monitor the real-time and accurate insitu temperature in harsh environment, which will demand their electrodes with high thermal-resistant properties, high sensitivity, and stability. In this work, a series of solid solutions based on strontium lanthanum chromate were systematically investigated as new electrodes. LaCrO3 and La0.8Sr0.2CrO3 with some glass additives were chosen to fabricate high-performance thick-film thermocouple due to a bigger Fermi level difference between them. The thermocouple shows a high sensitivity (107.8V/degrees C) during static calibration, and an excellent reproducibility and stability during multicycle calibrations carried out up to 1550 degrees C, resulting in a record ultra-high temperature sensing in film thermocouples. This facile thermocouple may open up a new way to measure high temperature in air or oxidation atmosphere accurately.