The Thermal Switches Experimenter’s Kit:-
The kit consist of thermal reed switch and thermal guard switch as shown in the figure 1 bellow
Figure 1
Some question that needs to be answered
What are thermal reed switch ?
Thermal Reed Switch is a highly reliable, precise temperature-sensitive switch. Its unique proprietary design features a magnet and a temperature-sensing soft ferromagnetic substance called Thermorite®. The material’s magnetic flux density decreases as the temperature increases turning it into a paramagnetic substance at the Curie temperature.
What is Thermorite ?
Thermorite is ferri-magnetic material that changes its magnetic property rapidly at its Curie temperature.
What is a reed switch ?
The reed switch is an electrical switch operated by an applied magnetic field.
Working of reed switch ?
The switching mechanism is comprised of two ferromagnetic blades, separated by only a few microns. When a magnet approaches these blades, the two blades pull toward one another. Once touching, the blades close the normally open (NO) contacts, allowing electricity to flow.
Figure 2
Working of thermal reed switch ?
Thermal reed switch are either switch on or off depending upon the temperature and the type of thermal switch. In blog 3 you will see experiment with various thermal reed switches.
What are thermal guard switch ?
Thermal Guard (OHD) are temperature-sensing switches composed of a magnet and a temperature-sensing soft ferromagnetic substance called Thermorite. This material’s saturation magnetic flux density decreases as the temperature increases, and it turns into a paramagnetic substance at its Curie temperature
Anything more looking in the kit ?
Temperature indicating paint/paper also known as thermochromic piant/paper
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