Hydrofarm LGBQM Quantum PAR Meter Micromol Sensor
 
Data logging capability using standard mini-USB cable and proprietary data logging software available at Hydrofarm
Low power consumption with built-in low Battery power Indication
Constant linear response curve (as opposed to other meters' Gaussian response) yields higher accuracy independent of wavelength - perfect for measuring LED light output
No assembly required
Logging software compatible with Windows XP, 7 & 10 only