gas thermostatic switch

gas thermostatic switch

[¦gas ′thər·mə‚stad·ik ′swich]
(electricity)
A thermostatic switch in which heat causes the pressure of gas in a sealed metal bellows to increase, thereby moving the bellows and closing the contacts of a switch.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.