If you monitor, install, maintain or monitor the performance of solar panels or a photovoltaic system, the Fluke IRR1-SOL Radiation Meter gives you the 4 critical measurements you need in one easy-to-use instrument. Take direct measurements to determine the number of watts per square meter of solar radiation, as required by the IEC 62446-1 standard. Measure the temperature by placing the meter directly on the panel or by connecting the external probe. Find the wind direction with the compass and check the slope of a roof or panel with the tilt function. Get all the essential photovoltaic measurements needed to install, monitor and report on the performance of a photovoltaic system, in one instrument.