Temperature Sensors

There are various types of temperature sensors that exist, but the most common type, which is designed here at MSC, operates in direct contact with the object being monitored. The direct contact temperature sensor here at MSC is designed using thermistors which are either Negative Temperature Coefficient (NTC) or Positive Temperature Coefficient (PTC). As the temperature changes, it directly changes the resistance of the thermistor and can be converted to an output signal. This is achieved when the sensor measures the surrounding temperature and converts the input data into electronic data. This can be converted to a temperature to determine any changes to the device being monitored such as an engine coolant temperature sensor, jet turbine, or a residential thermostat.

Temperature sensors are devices used to measure temperature readings through an electric output signal. Typically, the sensors are made up of internal components that generate voltage or resistance as it detects changes of temperature in the surrounding environment. The four most common types of temperature sensors in electronics are resistance temperature detectors (RTD’s), thermocouples, thermistors, and semiconductor based integrated circuits. MSC’s temperature sensors mostly consist of resistance temperature detectors which requires internal components for the sensor to function properly. A resistance temperature detector (RTD) functions by providing variation in resistance in response to the temperature change. There are two main types of RTD’s which consist of positive temperature coefficient resistors and negative temperature coefficient resistors. For positive temperature coefficient sensors, the resistance value increases as temperature increases and for negative temperature coefficient sensors, the resistance value decreases as the temperature increases.

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