Introducing the Treegers Quantum PAR Meter: An advanced tool for precision measurement in horticultural lighting. Designed to help gardeners optimise their yields using precision lighting and measurements, Treeger's Quantum PAR Meter is a tactical product choice to add to your growing toolbox. Accurately measures Photosynthetic Photon Flux Density (PPFD) level within the 400 to 700 nm range, essential for crop control success. A tactical product choice to add to your growing toolbox. Stores up to 99 readingsDLI ( Daily Light Integral)Remote Sensor with 1.5m Coiled Cord and 3.5m Straight CordMeasurement Range: 0-4000 μmol/m2/secDetection Range: 400 – 700nmPower Requirements: Comes with 2 x AAA batteriesOperating Temperature 32°F to 122°F (0°C to 50°C)Storage Temperature -4°F to 140°F (-20°C to 60°C)Operating & Storage RH 0-95%, non-condensingPPFD Measurement: Repeatability +/-1 μmol/m2/sec ; Measurement Range 0-3999 μmol/m2/secDisplay Resolution: 0.1 μmol/m2/sec (0-999); 1 μmol/m2/sec (1000-3999)Cut-On Wavelength: 400+/-10nmCut-Off Wavelength: 700+/-10nmWarranty: 2 Years