3450RC 81890021

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The 3450RC 81890021 is a temperature sensor and thermostat designed to measure and control the temperature in a wide range of applications. This device is considered to be a mechanical thermostat as it relies on mechanical action to detect and control the temperature. Its operating principle centers on a temperature sensing device, such as a bi-metallic thermometer or thermistor, that detects fluctuations in temperature and causes the mechanical thermostat to open or close.

The 3450RC 81890021 is a versatile device and can be used in a variety of applications. It is used in heating, ventilation, air conditioning (HVAC) systems as a means to detect temperature and turn appliances on or off as the temperature rises or falls. This device is also used to turn off lights when the temperature reaches a certain level, as an industrial and commercial temperature regulator, as well as in aquariums and greenhouses.

The thermostat features a temperature sensing device that is connected to a controller with a sensing element. As the temperature of the environment increases or decreases, the sensing element will detect the change in temperature and cause the mechanical thermostat to open or close. This action will then cause the controller to activate either an appliance or turn off a light.

The operating range of the 3450RC 81890021 corresponds to the temperature ranges in which the sensing element is used. The common sensing element for the thermostat is a bimetallic thermometer which has an operating range of up to 250°F (121°C). Additionally, a thermistor can also be used if a wider temperature range is required.

The mechanical thermostat typically features manual reset functionality which allows the user to reset the device after an event such as a power outage. The reset is accomplished by turning the knob which pushes a pin back into the sensing element causing the thermostat to reset. This reset feature gives the user greater control and enhances the thermostat’s performance.

In summary, the 3450RC 81890021 is a mechanical thermostat device designed to measure and control temperatures within a range of applications. It operates based on a sensing element, such as a bi-metallic thermometer or thermistor, which is connected to a controller and opens or closes based on changes in temperatures. Additionally, the thermostat has manual reset functionality, making it suitable for a variety of applications.

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