UV sensor basic circuit

Published:2011/5/5 2:51:00 Author: | Keyword: UV sensor, basic | From:SeekIC

The basic circuit of UV sensor and it's output waveform is as shown in the picture, in which R1and C1 form the charge and discharge loop circuit. It's time constant is called damping time constant.The decay time of electrode residual ion is generally 5-10ms. When the incident UV flux is below a certain value, there can be obtained a number of pulses from the output proportional to those from the incident flux, but if the flux is larger than this value, due to C1's discharge, the tube current is saturated. Therefore, the UV sensor is suitable to be used as photoelectric switch, while not suitable for precision UV measurement.



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