Measured Midday Sunlight — Apogee MQ-500 and AquaHorti AH-Quantuv Agree, Danoplus DP-355 Doesn’t
Автор: Luis Yin
Загружено: 2026-03-08
Просмотров: 1439
Описание:
I put three PAR meters side by side today to measure direct midday sunlight.
Clear sky, around noon, sensors placed right next to each other.
Here’s what they showed:
Apogee MQ-500: 1495 µmol/m²/s
AquaHorti AH-Quantuv: 1510 µmol/m²/s
Danoplus DP-355: 1684 µmol/m²/s
MQ-500 and DP-355 landed almost exactly in the same range, right around what you’d expect for strong full sun.
Danoplus DP-355 read quite a bit higher under the exact same conditions.
Made me curious how much variation people see between different PAR meters.
Has anyone else compared multiple meters under natural sunlight?
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