66L090-0429

Series:	6600
Part Status:	Active
Circuit:	SPST-NC
Switching Temperature:	194°F (90°C)
Reset Temperature:	140°F (60°C)
Current Rating - AC:	1A (120V)
Current Rating - DC:	1A (48V)
Tolerance:	±9°F (±5°C)
Switching Cycles:	25K
Termination Style:	PC Pins
Mounting Type:	Through Hole
Package / Case:	8-DIP (0.300", 7.62mm), 4 Leads

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Temperature Sensors - Thermostats - Mechanical : 66L090-0429 application field and working principle

Temperature sensors are devices designed to measure temperatures in a particular environment. Thermostats, for instance, are temperature sensors with added control capabilities. A 66L090-0429 thermostat is a bimetallic mechanical thermostat designed to operate in HVAC and refrigeration applications. This article will explain the 66L090-0429 application field and working principle.

Application Field

The 66L090-0429 thermostat is typically used for temperature control in heating, ventilation, and air conditioning systems. It is designed to work with all types of system components including furnaces, boilers, and air conditioners.This thermostat is also suitable for use in commercial refrigeration systems. Its wide adjustment range and quick make-break properties make it suitable for applications such as defrost cycles in refrigerators, chillers, and freezers.

Working Principle

The 66L090-0429 thermostat is a bimetallic mechanical thermostat. It consists of two metal strips, each made out of a different metal, which are bonded together. The two metals expand and contract at different rates when exposed to heat, creating a mechanical force. This mechanical force pushes against a spring-loaded plunger. When the temperature increases, the plunger presses against a switch, activating it. The switch then closes, sending a signal to the HVAC or refrigeration system to either turn on or off the unit. When the temperature decreases, the plunger is released, and the switch opens, sending a signal to stop the unit.

Conclusion

The 66L090-0429 thermostat is a bimetallic mechanical thermostat designed to provide temperature control in HVAC and refrigeration system components. The thermostat consists of two metal strips which expand and contract at different rates when exposed to heat, creating a mechanical force which pushes against a spring-loaded plunger. At certain temperatures, the plunger presses against a switch, activating or deactivating the system.

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