Apogee’s new DLI meters are a cost-effective tool for making research-grade measurements. Designed to measure photosynthetically active radiation (PAR) and extended PAR (ePAR) beyond the traditional 400–700 nm range. In addition to measuring PAR and ePAR, the DLI meters calculates daily light integral (DLI) and photoperiod.
The meters have two different screen modes: stored data and live view data. In the stored data screen, it shows the DLI measurement, photoperiod, and which day the data was collected (up to 99 days ago). The live view data screen displays a running average of PPFD or ePPFD from the last 2.5 seconds.
- DLI-400: accurate for measuring 400-700 nm only in sunlight and under some broadband light sources.
- DLI-500: 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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