This item is an Infared Associates Model 3 Element Detector.
Per manufacturer website: InfraRed Associates, Inc. is a leading manufacturer of multi-element Photoconductive HgCdTe (MCT) arrays. These custom designed multi-element arrays are available up to 128 elements in a linear or 2x format. Element separation as small as 12um can be provided.
Applications: Thermal Imaging, Laser Spectroscopy (PPM), Imaging FTIR Spectroscopy, Gas Analysis
Note: Details for the wavelength and specs for this unit are unavailable. The surface of the lens on this unit has some coating deterioration.
This unit came from a working environment but has not been tested. Please call for more information.