“Virtual” make Handheld Pyranometer (Solar Radiation Recorder) reflect state of the art in micro controller based instrumentation design. The Pyranometer sensor can be attached with this handheld terminal for the collection of real time data Manually/automatically (user selectable). The terminal has its internal memory along with, a real time clock with an LCD (16 X 2) to display the instrument status. It is a self-contained power source system, fitted with 2XAA Alkaline type batteries with battery level display, complete with sensor mounted on a levelling Base Plate. Sensor powered directly from Handheld terminal and no need of external power source. 4 x 2 keypad is provided for programming data logger and monitoring sensor reading at site without the help of computer. Can store up-to 9 different sites data with Site ID. USB port is provided for data downloading from terminal to Computer/Laptop. Data file is saved in Microsoft’s Excel Format.