- TSM clamp-on RTD
- Performance
TSM clamp-on RTD: Performance
In temperature monitoring applications, response time and accuracy are crucial for reliable performance. The TSM clamp-on RTD offers exceptional accuracy and rapid response across its -25°C to 160°C measuring range.
- Accuracy of ±0.25°C (±0.45°F)
- T05 response time of 7.5 seconds and T09 of 25 seconds
Below is the test data comparing a clamp-on RTD with in-process temperature probes.
Response time & accuracy:
clamp-on vs direct insertion vs thermowell insertion
Test conditions
When insertion-style temperature sensors are top-mounted on a pipe, air gaps form in the tee where the units are installed. This ambient air interferes with the temperature measurement by exposing a larger surface area to ambient conditions. In contrast, when bottom-mounted, the tee fills with media, preventing air from acting as a thermal insulator. The TSM clamp-on RTD's technology eliminates these issues, ensuring accurate measurements regardless of the sensor orientation.
The table below lists the products used in the testing above and the conditions within the pipe.
| Clamp-on vs direct vs thermowell | Clamp-on vs high-speed thermowell |
|---|---|
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Test results summary
Clamp-on vs direct insertion vs thermowell insertion
In the testing data graphs above, you can see that the TSM clamp-on RTD has a faster response time than a thermowell-installed temperature sensor as temperatures rise, regardless of top or bottom mounting. When top mounted, in which air bubbles are more susceptible, the thermowell setup never reaches the final temperature. Similarly, with decreasing temperatures, the TSM achieves about 95% of the final measurement approximately 2 minutes faster than the thermowell installation.
As shown in the accuracy graph, the TSM maintains consistent accuracy whether or not air bubbles are present, and it is more accurate than the thermowell installation at lower temperatures.
Clamp-on vs high-speed thermowell
The thermowell installation used in the high-speed testing above is designed for a high-speed temperature sensor with a 3 mm probe diameter. While the TSM was still comparable to this high-speed thermowell setup in terms of response time, the thermowell demonstrated slightly better accuracy.