OHD3-85M

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Temperature Sensors - Thermostats - Mechanical are used to measure temperature. OHD3-85M is one such temperature sensor, used to detect and measure temperatures in any environment. It is primarily used to ensure safety and to accurately monitor the temperature of various objects and systems. The OHD3-85M is a heat sensitive, mechanical thermostat that includes a bimetallic disc, a switch assembly, a case and a capillary tube.

Bimetal Disc

The OHD3-85M uses a bimetallic disc that responds to temperature with a predictable and repeatable range of motion. The thermostat consists of two different metals, fused together at one end. Due to their different thermal expansion rates, the fusion point will move when heated. This is what causes the disc to bend or expand.

Switch Assembly

This thermostat features a switch assembly that tracks and responds to the changes in the bimetallic discs. The switch is open when the temperature is below a certain predetermined setting (the set point), and it closes when the temperature rises above the set point. When this occurs, current will flow through the switch and provide an indication that the predetermined set point has been met.

Case and Capillary Tube

The OHD3-85M also includes a case and a capillary tube. The case houses the bimetallic disc and the switch assembly, and the capillary tube is filled with a heat exchange fluid (usually liquid or gas). The capillary tube is used to transfer heat from the object being monitored to the bimetallic disc, allowing the disc to accurately sense the temperature.

Application Fields and Working Principle

The OHD3-85M is used in a variety of applications, including heating and air conditioning systems, automotive cooling systems, electrical appliances, and industrial processes. In these applications, it is used to detect and measure temperatures in order to ensure safety and maintenance of the objects or systems.

The working principle of the OHD3-85M is simple. The bimetallic disc is heated by the heat exchange fluid, and as it expands, it pushes against the switch assembly. When the predetermined set point is met, the switch closes and current is allowed to flow. In this way, the OHD3-85M is able to accurately sense and detect changes in temperature.

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