urn:nasa:pds:context:instrument:multi-host.generic_insp_hsp 1.0 1.14.0.0 Product_Context 2020-09-23 1.0 Initial submission Generic InSb High Speed Photometer Photometer This is a generic high speed photometer which uses an indium antimonide (InSb) crystal in a low temperature, strong magnetic field environment as the detector. In this environment, InSb which is a narrow-gap semiconductor, is sensitive to the intensity of infrared light. The nominal operating wavelength range is 2000nm to 2400nm. A large number of these were produced by several manufacturers and were in wide use in the 1960's and 1970's. Some were still in use in the early 21st century.