Type K (chromel\u2013alumel) is the most common general-purpose thermocouple with a sensitivity of approximately 41 µV/°C. It is inexpensive, and a wide variety of probes are available in its \u2212200 °C to +1350 °C (\u2212330 °F to +2460 °F) range. ... This reduces the emf output, and the thermocouple reads low.