The P-9801 series optometers are one of the most powerful light measurement instruments available for multiple light detector head applications. For use in those applications the P-9801 features:
Industries most powerful & fastest multichannel light meter
simultaneous measurement of all eight detector channels
wide linear detector signal dynamic range
short rise time with variable sampling rate
fast multi-channel data-logging
manual and remote control operation
RS232 and IEEE488 interface
powerful 16 bit microprocessor with large memory
external trigger input with pre-trigger function