Thermocouples work by measuring the voltage difference that arises between two dissimilar conductors when these conductors are exposed to a temperature differential. The produced voltage is measured by an internal circuit and translated into a temperature.Continue Reading
Thermocouples are advantageous in their affordability, interchangeability and utilization of industry standardized connectors. Depending on the type of materials used in the probe and the circuit configuration, thermocouples can measure a wide range of temperatures. Thermocouples also require no external power source, making them more convenient than other types of digital thermometers. The low accuracy and responsivity of thermocouples limits their usage to industrial applications that do not require high controllability.
A junction between any two dissimilar conductors results in a potential between these conductors. The magnitude of this voltage difference is roughly linear with temperature. Special alloys are chosen for thermocouple probes to ensure that the increase in voltage that accompanies an increase in temperature is repeatable and predictable. Different probes, containing different alloys, are used for different temperature ranges. In addition to response linearity, the resistance of the probe materials to high-temperature corrosion is also important. The materials must also be nonreactive with one another at elevated temperatures. The formation of intermetallic compounds or alloys between the probe materials at high temperature interferes with measurement.Learn more about Heating & Cooling
Cracks in the boiler, pressure or temperature too high, and loose fittings may cause a boiler to leak. Some problems are easier to fix than others.Full Answer >
Oil-fired boilers burn heating oil to generate heat, which is then used to warm up water. Some boilers convert water into steam that is spread throughout pipes, while others use pumps to send the hot water through the pipes. Heat is then radiated through the structure.Full Answer >
A boiler may not work because it doesn't have power or the water level may be too low. Other problems that may cause a boiler not to work are a malfunction of the pilot or electronic burner or a malfunction in the thermostat.Full Answer >
A boiler's temperature and pressure valve might leak if it's not functioning correctly, and it might show visual signs of damage or corrosion, especially if it's an older valve. However, one of the biggest dangers of safety valves is that dangerous obstructions might not show any signs.Full Answer >