Photosynthetic Light (PAR) Smart Sensor | Onset's HOBO and InTemp Data Loggers
Determining Grow Light Position Using a PAR Meter - Apogee Instruments, Inc.
PAR-sensor LI-190-R-BL-5 with amplifier (0,4) | Royal Brinkman
Photosynthetic Active Radiation (PAR) Sensor - Independence Science
400-700 nm Quantum PAR Light Meter with Built in DLI and Scan Mode Accurate for All Light Sources, Grow Light meter, Indoor/Outdoor Plants meter, Quantum Separate Waterproof Sensor with Handheld Meter: Amazon.com: