TEMPERATURE SENSOR Russian patent published in 1994 - IPC

FIELD: system for maintaining a predetermined temperature in hot-houses. SUBSTANCE: sensor has ahousing comprising N cavities communicating with each other and filled with different-grade paraffins, an initial melting temperature each subsequent grade being close to full-melting temperature to ptovide a wide temperature range. The device is characterized by the use of a damping bellows to regulate an initial operation temperature. The bottom of damping bellows interacts with a controllable temperature-setting device. The latter is mounted on a power threshold element. The temperature sensor is coupled with a hydraulic system to provide failure-free operation. An elastic filler is used for transmitting force. Upon elevating temperature the eleastic filler is disposed into the hydraulic drive resulting in displacement of a rod and a load (air vent, etc.) coupled with it. EFFECT: enhanced reliability. 6 dwg