The LI-190R measures photosynthetically active radiation (PAR) in micromole of photons per meter squared per second. The sensor is suited for measurement of broad-spectrum light sources in greenhouses, under plant canopies, and growth chambers.
View specifications: here
LI-190SA is compatible with these loggers:
LI-COR10-Channel Light Sensor Logger LI-1400LI-COR 3-Channel Light Sensor Logger LI-1500LI-COR Quantum Radiometer Photometer LI-189LI-COR Light Meter LI-250
This sensor also requires a leveler to ensure level installation:
LI-COR Sensor Leveler