Request InfoTerahertz Technologies Inc.The PDA-750 from Terahertz Technologies Inc. is a low-noise, high-gain transimpedance amplifier that provides direct digital readout of the current generated from a photodiode or photomultiplier. Applications include unity quantum-efficient detectors, characterization of detector dark current, a readout interface for spectrometers and spectral calibration of detectors. Full-scale input ranges from ±20 nA to ±20 mA, with a noise level of <1 pA. Features include variable bias supply, background cancellation, a bidirectional RS-232 port and rechargeable batteries. A 4.5-digit...See full productRelated content from Photonics MediaPRODUCTSPhotonics.com 2/23/2024PIN PhotodiodeThe VEMD2704 from Vishay Intertechnology is a silicon PIN photodiode that can be used with green LEDs for optical heart rate detection and red LEDs for pulse oximetry applications. 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