Quantum sensors measure light energy at the specific wavelengths plants actually use for photosynthesis. Research indicates that older lux and foot-candle meters could have error rates up to 45% when used to estimate light quantum available for plant growth. Start taking more meaningful light level measurements yourself with a Field Scout light meter combined with quantum sensor bar.

All quantum sensors here measure Photosynthetic Photon Flux (PPF) as µmol m-2 s-1 for Photosynthetically Active Radiation (PAR) in the range of 400 to 700 nm. The Field Scout External Sensor Meter can be teamed with either the 6 sensor or 3 sensor handheld quantum sensor bars to provide a spatial averaged PAR (Photosynthetically Active Radiation) reading. PAR averages are a more comprehensive indicator of light quantity reaching your plants, and serve as a powerful tool to manage lighting.

Quantum meters can be used in the field, laboratory, above or below plants, in growth rooms and greenhouses. The meter measures radiation between 400 and 700 nanometers(PAR) as umol m-2s-1.

Click to view light guidelines for popular greenhouse plants.

Related Links: Measuring Light Brochure