66L065-0273

Temperature Sensors – Thermostats – Mechanical

Mechanical thermostats use a physical component, such as a bimetallic strip or a mercury switch, to detect temperature and enable or disable the operation of a device. The 66L065-0273 is an example of such a thermostat.

66L065-0273 Application Field

The 66L065-0273 is a precision mechanical thermostat with temperature control accuracy (plus or minus 5°F). It is used to control furnace fan motors, limit control operations in wall-mounted heating systems, condenser fan motors, electric heaters, and many other related thermal applications. The 66L065-0273 has an adjustable temperature differential or “set range” and is available in different temperature settings and ranges.

66L065-0273 Working Principle

The 66L065-0273 operates on the principle of bimetallic temperature sensing. When the temperature exceeds the set range, a bimetallic strip inside the thermostat responds to the temperature change by calming down and activating a set of contacts which in turn triggers the heating or cooling cycle.

When the temperature falls below the set range, the bimetallic strip responds to the temperature change by opening the contacts which in turn stops the heating/cooling cycle. The differential or “set range” can be adjusted to provide better control in different applications.

Conclusion

The 66L065-0273 precision mechanical thermostat is an example of a thermally activated switch based on the bimetallic strip technology. It is designed for use in many home and commercial applications, such as furnace fan motors, condenser fan motors, limit control operations in wall-mounted heating systems, and electric heaters. The 66L065-0273 offers an adjustable temperature differential (set range) and is available in different temperature settings and ranges.