Thermostat with mercury switch

Thermostat with mercury switch

H130/0246 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 50.5MB

Downloadable file size: 6.5MB

Price image Pricing

Please login to use the price calculator


Credit: CHARLES D. WINTERS/SCIENCE PHOTO LIBRARY

Caption: Home thermostat. The dial at lower left is used to determine the temperature at which the central heating system will turn itself off. To do this, a vial of mercury (centre right) is attached to a bimetallic strip (coiled, upper left). The strip contains two metals that expand at different rates on heating. This means that the strip as a whole bends during heating, with the metal that bends more on the outside of the curve. In this thermostat, the dial rotates the entire mechanism. When the temperature in the room rises to the set point, the mercury flows away from the contacts, breaking the electrical circuit and thus switching off the heating.

Release details: Model release not required. Property release not required.

Keywords: bi-metallic, bimetallic strip, central heating, close-up, coil, coiled, dial, domestic, domestic items, home, household goods, mercury switch, physical, physics, setting, thermostat

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.