Megger 1002-548 Irradiance Meter, PVM210
The PVM210 irradiance meter provides the solar/photovoltaic engineer with a compact, pocket-sized instrument that is easy to use. Indeed, single-handed operation is possible because the solar detector and meter are housed in one unit, which makes it ideal when using the instrument on a sloping roof or at the top of a ladder.
With the easy-to-read display and measurement hold feature, the meter gives fast, accurate readings of solar power so you can choose the inital optimum position for the photovoltaic panel.