Analog temperature gauges typically use a bimetallic strip or a thermocouple to measure temperature. The bimetallic strip is made of two metals with different coefficients of thermal expansion, so when the temperature changes, the strip will bend. This bending is then converted into a temperature reading by a pointer or dial. Thermocouples work by generating a small voltage when two different metals are joined together and heated. This voltage is then converted into a temperature reading by the gauge.
Digital temperature gauges use a thermistor or a resistance temperature detector (RTD) to measure temperature. A thermistor is a semiconductor whose resistance changes with temperature, while an RTD is a metal whose resistance also changes with temperature. These changes in resistance are then converted into a temperature reading by the gauge.
The highest reach by an engine is typically limited by the temperature at which the engine's materials begin to break down. For most engines, this temperature is around 2,500 degrees Fahrenheit (1,400 degrees Celsius). However, some engines, such as those used in racing cars, can reach temperatures of up to 3,000 degrees Fahrenheit (1,650 degrees Celsius).
Temperature gauges that can show the highest reach by an engine are essential for monitoring the health of engines and preventing them from overheating. By keeping a close eye on the temperature, operators can take steps to prevent damage to the engine and ensure that it operates safely and efficiently.
