IRM-1, small, but indispensable for testing PV systems. By measuring solar radiation values, as well as panel and ambient temperatures, it provides the necessary data to convert the results into STC conditions. A built-in recorder with a memory of 5000 records enables the instrument to be used as a tool in the PV plant design process, as well as to diagnose panel shading problems. Features Measurement of solar radiation and temperature. The LoRa interface for communication with the PVM-1020 meter - offers a larger range than the Bluetooth technology! Automatic data synchronization with the PVM-1020 meter. Built-in compass and inclination sensor. Built-in recorder that can be used to record solar radiation before constructing PV systems, as well as to measure the shading of existing systems. Large measurement memory: 999 cache memory cells and 5000 recorder records available (one-time recording) with the option of overwriting them (continuous recording).