PGS-100 is a spectrophotometer for the routine automated measurement of the spectrum of direct solar radiation. Direct solar measurements use an integrated solar tracker with active sun sensor correction. Wavelength range is from 350 to 1050 nm with wavelength accuracy 0.5 nm and bandwidth 3.6 nm. PGS-100 is easy to install, set up and use. The adjustable base platform has a built-in bibble level. The integrated sun sensor provides active solar tracking.

Measurement times, cycles and integration time are easily programmable. PGS-100 comes with Windows control and data logging software. The instrument must be connected via the RS 232 port to a computer (not included) running the supplied software in order to operate. The measured spectra are displayed directly on-screen and can be analysed using wavelength selection tools.

PGS-100 provides spectral data that can be post-processed by the user (software not included) to derive a variety of parameters, including: - Spectral optical depth (350 ~ 1050 nm)
- energy distribution
- absorption by atmospheric gasses