The multi-function conductivity tester circuit consists of a detector electrode, a resistor divider, a snubber circuit, and a dichroic diode, as shown. The detecting electrode senses the resistance of the object to be tested, and controls the two-color LED to emit light according to the magnitude of the resistance of the object to be tested. When the detecting electrode senses that the resistance of the measured object is greater than 300kΩ and less than 1000kΩ, the green indicator light is bright; when the resistance of the detected object is less than 300kΩ, the red indicator light is bright, so that the two colors are synthesized into orange-red light; when the resistance of the measured object is greater than 1000kΩ , two-color indicator light VL3, V14. does not emit light. Adjusting the potentiometer RP can change the sensing range of the detecting electrode.
In the near-infrared, the wide spectrum of the infrared spectrum, the total reflection mirror is coated with a high reflectivity gold film.
In order to enhance the adhesion of the gold film, a very thin chromium base film is plated.
The gold film of the silicon substrate has strong adhesion, high thermal conductivity (the thermal conductivity is about 111 times that of glass), and the heat resistance is much better than that of the glass substrate.
Because it is a metal film, the reflectance or reflectance wavelength characteristics will not change greatly with the incident angle.
·The gold film has a high reflectivity in the infrared spectrum. The light that is not reflected is completely absorbed by the film and will not pass through.
Gold Mirror,Gold Reflector,Protected Gold Reflector,Protected Gold Mirror
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