Kihlstrom Temperature Indicator ((link)) -

Furthermore, modern mineralogy places a heavier reliance on optical properties viewed through a petrographic microscope or chemical analysis via X-ray fluorescence (XRF) guns. These methods provide definitive identification, whereas thermal testing is often considered a preliminary or supplementary test.

Reality: They are accurate for threshold detection . Do not use them to measure a rising temperature profile. Use a thermocouple for that. Use the Kihlstrom indicator to confirm the thermocouple was telling the truth. kihlstrom temperature indicator

: Protects transformers from excessive heat, which can deteriorate winding insulation and shorten equipment life. Furthermore, modern mineralogy places a heavier reliance on