This circuit uses a bridge circuit. When the temperature sensitive resistor Rt is subjected to different temperatures, the resistance value changes with temperature, the bridge loses balance, and the two input terminals of the OP07 of the comparator are not equal, so that the output changes, the through-type meter The magnitude of the change can be observed to calculate the amount of change in temperature.
Sapphire is a single crystal of alumina, also known as corundum. As an important technical crystal, sapphire has been widely used in many fields of science and technology, national defense and civil industry. Sapphire glass has good thermal properties, excellent electrical and dielectric properties, and is resistant to chemical corrosion. It has high temperature resistance, good thermal conductivity, high hardness, infrared transparency, and good chemical stability. Therefore, it is often used to replace other optical materials to make infrared-transmitting optical windows, and is widely used in infrared and far-infrared military equipment, such as: used in night vision infrared and far-infrared sights, night vision cameras and other instruments and satellites, In space technology instrumentation, as well as windows for high-power lasers, optical windows, UV and IR windows, and observation ports for low-temperature experiments, they are fully used in high-precision instrumentation for navigation, aerospace and aviation.
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