The UVB-1 and UVA-1 Pyranometers measure total irradiance from 280 to 320 nm and 320 to 400 nm, respectively. The instruments produce a high level 0-4 VDC output signal and are thermally stabilized for long term reference-grade measurements. The UVB-1 is field proven in networks throughout the world. Solar dose modeling software, UV-Calc, is included with the instrument. The UVPS power supply (shown) or the YESDAS-2 datalogger are available as accessories.