Profile: PV Measurements, Inc. offers solar cell measurement equipment. Our spectroradiometer measures the spectral irradiance of sunlight and solar simulators. It includes an optical pickup head with a diode-array spectrometer to measure light, a calibration lamp to ensure accurate measurements, and a notebook computer for portability. The customized software included in the spectroradiometer interprets signals from the spectrometer, maintains calibration information, calculates solar simulator spectral classification, and displays & saves test data. Our uniformity tester uses an array of solar cells to assess the uniformity of light on its surface. Our reference cells are used to set the intensity of a light source to a particular test condition for I-V measurements. They include a rugged enclosure, solar cell, temperature sensor, and protective window.