Definition
A temperature sensor measures the temperature at a specific point on or within equipment, using a thermocouple, resistance temperature detector (RTD), thermistor, or similar element depending on required accuracy and range, and converts that measurement into an electrical signal used for control, protection (see motor overtemperature), or condition monitoring.
Key facts
- Measures temperature specifically, using several possible sensing technologies (thermocouple, RTD, thermistor) suited to different accuracy and range needs.
- Feeds both real-time protective functions (tripping on overtemperature) and longer-term condition-monitoring trend analysis.
- Placement matters significantly: a sensor not located at the actual hot spot may miss a developing problem.
- Distinct from thermography, which captures a full surface temperature image rather than a single point measurement.
How does Temperature sensor work or appear?
A temperature sensor converts the thermal condition at its specific measurement point (a motor winding, a bearing housing, a process fluid) into an electrical signal proportional to temperature, supporting both immediate protective response (such as tripping on motor overtemperature) and ongoing trend monitoring for condition assessment.
What should technicians inspect for Temperature sensor?
A temperature sensor provides a single-point, continuous measurement at a fixed location, well suited to real-time protection and trending. Thermography instead captures a full surface temperature image in one snapshot, useful for spotting an unexpected hot spot anywhere within the imaged area rather than only at a pre-selected sensor location.
FAQ
Frequently asked questions
Which temperature does a temperature sensor capture?
A temperature sensor captures the temperature at a specific point on or within equipment, converting it into an electrical signal used for protection and condition monitoring, distinct from a full-area thermographic image.
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