Check out this awesome Portable Handheld Quantum PAR Meter from Hydrofarm. This package includes 2 meters. This fancy little gadget measures Photosynthetially Active Radiation (PAR) and features a highly-accurate, integrated Quantum Sensor. It measures from 400 to 700 nm with a range of 0 to 10,000 umol and can record up to 99 readings. It shows off built-in battery power indication so you'll always be aware of its life status and how long it can be of use. It has a constant linear response curve and yields incredibly high accuracy that's perfect for measuring LED light output. For the most precise readings in the horticultural world, keep this Hydrofarm Quantum PAR Meter on hand.
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