Apogee DLI Meters
Research grade spot measurements of PPFD, DLI and photoperiod
The Apogee PAR, Daily Light Integral, and Photoperiod Meters can take instant readings of PAR or ePAR, whilst automatically recording the daily light integral (DLI) as total photons in mols, and hours of light (photoperiod in 0.1 hours) for upto 99 days.
This stored data can then be accessed via the button on the device, or the DLI, photoperiod, and 30 minute PPFD averages can be downloaded as CSV files via a USB-C cable to a computer.
Designed to fit a standard tripod fitting, these meters can be installed in many situations for accurate, long term measurement of growing conditions.
Apogee’s DLI meters take spot measurements of PPFD, while also recording daily light integral (DLI) and photoperiod with only one handheld instrument.
- DLI-400: for measuring 400-700 nm only in sunlight and under some broadband light sources.
- DLI-500:Â Full-spectrum is accurate for measuring 400-700 nm under all light sources including LEDs.
- DLI-600:Â ePAR is accurate for measuring the newly discovered extended PAR (ePAR) 400-750 nm range under all light sources.
Apogee DLI Meters
Three Models
Three models are available, with full details found on the Apogee website:
- DLI-400: for measuring 400-700 nm only in sunlight and under some broadband light sources.
- DLI-500:Â Full-spectrum is accurate for measuring 400-700 nm under all light sources including LEDs.
- DLI-600: ePAR is accurate for measuring the newly discovered extended PAR (ePAR) 400-750 nm range under all light sources
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