HydroRad-E1 Single-channel Radiometer System
The HydroRad-E1 measures irradiance or radiance through a light collector mounted on the end of its case. Typically used to measure downwelling solar irradiance, it can also be used to measure irradiance or radiance in any orientation or location, above or below water. Like all HydroRad models, it is a completely self-contained measurement system with sophisticated data logging and interfacing capabilities.