DescriptionThe OS37-CF/OS37-60CF Series infrared thermocouples for high emissivity targets (non-metals and coated metals) and the OS38-CF/ OS38-60CF Series for low emissivity targets (clean metals) feature an internal adjustment screw which adjusts the 2% accuracy band anywhere within the overall temperature measurement range. All of these units use a lens to produce a minimum spot at a focal point. Models with 30° optics produce a rectangular minimum spot size in the focal plane by using a masked detector. Models with 1° (60:1) optics produce a more conventional round minimum spot size at a focal point. All models feature a built-in air purge.