What method is commonly used to measure the temperature of fuel in storage tanks?

The thermocouple is widely used to measure the temperature of fuel in storage tanks due to its accuracy and reliability in a variety of conditions. This device consists of two dissimilar metal wires joined at one end; when this joint is heated or cooled, it produces a voltage that can be interpreted as a temperature reading. Thermocouples can provide real-time temperature data, which is essential for monitoring fuel storage conditions and ensuring safety. They can also be used in various temperature ranges, making them suitable for different types of fuels and storage conditions.

Other options, such as the infrared thermometer and digital temperature probe, serve specific purposes but may not be as ideal for continuous monitoring in large and often insulated fuel storage tanks. Infrared thermometers provide surface temperature readings rather than true internal temperatures, and while digital temperature probes can offer accurate readings, they may not be as robust or suitable for long-term installations compared to thermocouples. A barometric pressure gauge, on the other hand, is used to measure atmospheric pressure and is not designed for temperature measurement.