Opto Diode’s PbS detectors (lead sulfide, A-Series) deliver stable, high-performance infrared detection across the 1 µm to 3 µm spectral range, with peak response between 2.2 µm and 2.7 µm depending on model and cooling. The line spans uncooled AP-series detectors and thermoelectrically cooled AT-series models with element temperatures down to −45 °C, in active areas from 1 mm × 1 mm to 6 mm × 6 mm and hermetic TO-5, TO-8, and TO-37 packages. Featuring low noise, high detectivity, and excellent long-term stability, these detectors are optimized for infrared applications such as gas sensing and spectroscopy, flame detection, moisture monitoring, and remote temperature measurement. Custom configurations are available, and every detector is manufactured at Opto Diode’s Camarillo, California facility under ISO 9001:2015 quality control.

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