Originally stuctured around development of test and measurement technology for the solar photovoltaics industry, Atonometrics, Inc. offers soiling and irradiance measurement products for long-term outdoor use on PV installations worldwide. Products include Mars Soiling Sensor for PV Installations: Maintenance free, no water, no moving parts, easy installation * No site-specific calibration is necessary * Easy integration with SCADA system or dataloggers; PV Device Soiling Measurement Systems for PV Installations: Measures both soiling and irradiation * Measures uniform and non-uniform soiling * Automatic washing system available * PV Reference Cell; High accuracy irradiance measurements for PV installations * Analog and/or digital outputs available * Integrated Pt-100 RTD for temperature measurement