SQ-422-SS: Modbus sun and electric calibration quantum sensor

The SQ-422 sensor outputs a digital signal using Modbus RTU protocol over RS-232 and RS-485. The sensor is calibrated for sunlight and electric lights, selectable through Modbus commands, and has a command that automatically applies the immersion effect correction factor for underwater measurements. The sensor features a rugged, self-cleaning sensor housing design. Typical applications include PPFD (Photosynthetic Photon Flux Density) measurement over plant canopies in outdoor environments, greenhouses, and growth chambers, and reflected or under-canopy (transmitted) PPFD measurements in the same environments. Quantum sensors are also used to measure PAR (Photosynthetically Active Radiation)/PPFD in aquatic environments, including salt water aquariums where corals are grown.