Why check resistance sensors?

Question

Electronics

I wanted to know about temperature sensors (thermal resistance), they are checked every four years. Do physical properties change during this time?

Answer 1

everything ages :(
see the documentation for a particular sensor, the check interval must be indicated there. Also, the aging parameters of the measuring device are applied there.
it all depends on the type of sensor. semiconductor is less accurate and ages faster.
platinum is more accurate and ages less.

Answer 2

1. Research, development and production in a broad sense are only possible on the basis of measurements.
2. Measurements can be trusted when made with accurate measuring instruments. In addition to them, there are also indicators with an accuracy of plus or minus felt boots (for example, a wooden school ruler).
3. You can make sure that the measuring tool is accurate by comparing it with a known accurate standard. This is what verification is . But the indicators are allowed not to be verified, for obvious reasons.
4. If your thermistors are verified, then they belong to the class of a measuring tool, and not indicators. It is possible to attribute some tool to a certain class by the combination of many parameters - ask the metrologists, they will explain.

Answer 3

Yes, they change, sometimes so much that they do not pass verification and they are changed to new ones. Well, the operating conditions have an effect, they are not always ideal and there is a chance that the readings will float away.