Needle stock behind the stopper on temperature gauge?

The needle stock behind the stopper on a temperature gauge typically indicates the maximum temperature reached by the gauge, serving as a visual reference for monitoring temperature changes. When the temperature exceeds a certain level, the needle moves and can become stuck due to thermal expansion or a malfunction. To reset or adjust the gauge, it may be necessary to carefully manipulate the stopper or recalibrate the gauge according to the manufacturer's instructions. Regular maintenance can prevent this issue and ensure accurate temperature readings.