The way an industrial thermometer works depends upon the type of temperature sensor it uses. Sensor options include bimetal, liquid or gas-filled, electronic, or infrared (IR). Liquid or gas-filled thermometers use a gas or liquid as the temperature-sensing element. The liquid expands as the temperature rises in the tube and indicates the temperature. The basic design for this type of thermometer is a small-bore glass tube with a thin-walled glass bulb at the lower end.
Resizing involving cutting probably in the $50-100 range for silver or for reducing a gold ring, enlarging a gold ring with added metal could run $100-250 depending on how large the ring is - a real hefty men's ring will obviously take more metal, so more cost, than a thin wedding band.
When a Ring Cannot Be Resized. There is a limit to how much the size of a ring can be changed, if at all. If the desired increase or decrease is more than one or two sizes, then it is unlikely that resizing would be possible without putting the ring at risk of damage.