Apogee Instruments PAR & ePAR Meters

About

Apogee Instruments makes the light meters that horticultural research actually runs on. If you have read a study quoting PPFD figures, there is a good chance an Apogee sensor took them. For growers, they are the difference between guessing your light levels from a manufacturer claim and knowing what is reaching your canopy. PAR meters: MQ-500 and MQ-510 full-spectrum quantum meters with wand, measuring 400-700nm PPFD - see all PAR and grow light meters . ePAR meters: MQ-610 and MQ-650 extended-range meters covering 400-750nm, which captures the far-red that standard PAR meters miss. DLI meters: DLI-500 and DLI-600 for daily light integral - total light delivered over a day rather than intensity at one moment. Sensors: The PQ-612 ePAR sensor for permanent installation and logging. Accessories: The AA-100 protective carry case and AC-100 communications cable. Why choose Apogee Instruments? Because manufacturer PPFD maps are measured in ideal conditions and your room is not ideal. An Apogee reading tells you what is actually hitting the canopy at the edges as well as the centre, which is usually where the yield is being lost. Apogee Instruments FAQs PAR or ePAR? Standard PAR (400-700nm) is the long-established measure. ePAR extends to 750nm to include far-red, which is photosynthetically active in combination with red light. If you run LEDs with far-red, ePAR gives a truer picture. What is DLI and why does it matter? Daily Light Integral is the total number of photons delivered over 24 hours. It matters more than peak intensity - the same DLI can be delivered gently over long hours or hard over short ones. Do I need a meter if my light has a PPFD chart? The chart tells you what the fixture does at a given height in a test rig. It cannot account for your reflective walls, hanging height, or the second fixture next to it. Why buy Apogee Instruments from The Hydro Bros? We stock the Apogee Instruments range in full, ship discreetly across the UK and Europe, and know these