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Suitable for a variety of pulsewidth measurement and pulse profiling applications. ET Series photodetectors use PIN photodiodes and a reverse bias. These photodiodes utilize the photoelectric effect to convert light energy into a electrical current. The reverse bias consists of either 3V lithium cell(s) or a wall plug in power supply, depending on the amount of bias voltage needed and the intended application of the photodetector. All photodetectors contain their own BNC or SMA output connector. Connecting the photodetector to an oscilloscope and terminating into 50Ω at the oscilloscope is all that is required for operation. Most of EOT's photodetectors can be fitted with FC fiber optic connectors for use with fiber pigtailed light sources.