The Colorimetry Research CR-250-RH Spectroradiometer / Spectrophotometer is constructed of machined aluminum and stainless steel to be rugged and provide a long lifetime of use. It has been designed specifically for the professional calibrator, and it provides a large spot size on contact measurements and a small divergence angle that keeps the measurement spot size within desired dimensions for display panel and projector calibrations. Fixed optical elements resist vibration, and they can withstand shock and high acceleration/deceleration for use in the most demanding motion positioning systems and environments. Remotely control the CR-250-RH via USB 2.0 from host software running on any personal computer, laptop, or net book running Windows, macOS, or Linux.