{"product_id":"apogee-instruments-dli-600-epar-daily-light-integral-and-photoperiod-meter-400-750-nm","title":"Apogee Instruments DLI-600 ePAR, Daily Light Integral, and Photoperiod Meter (400-750 nm)","description":"\u003cdiv class=\"container\"\u003e         \n    \u003cp\u003e\n        \u003cstrong\u003eDLI-600 ePAR METER - \u003c\/strong\u003eThe Apogee Instruments' DLI-600 is an elegant, simple-to-use device for spot checking photosynthetically active radiation (PAR) in the traditional 400-700 nm range as well as extended photosynthetically active radiation (ePAR) in the 700-750 nm range. ePAR has recently been shown to enhance cell expansion and help with photosynthesis when paired with PAR exposure. In addition to measuring ePAR, the DLI-600 meter calculates daily light integral (DLI) and photoperiod. DLI refers to the total amount of PAR or ePAR incident on a plane in a 24-hour period, expressed in units of moles per square meter per day (mol m-2 d-1). Photoperiod is the total amount of time in which PAR or ePAR is incident on a plane during a 24-hour period and is expressed in units of hours (h). ePAR, DLI, and photoperiod influence plant growth and development, and they are often measured in greenhouses and growth chambers to aid in light management and decision making. The DLI-600 is accurate under all light sources.\n    \u003c\/p\u003e\n    \u003cp\u003e\n        \u003cstrong\u003eACCURATE, STABLE MEASUREMENTS - \u003c\/strong\u003eOur research-grade sensors are trusted by scientists and serious growers all over the world for their accuracy and stability. Hobby-grade meters are often accurate out of the box, but drift in accuracy quickly. However, Apogee research-grade quantum sensors have an industry-leading accuracy drift rate of less than 2 % per year. All sensors are NIST traceable and are built and calibrated at our headquarters in Logan, Utah, USA.\n    \u003c\/p\u003e\n    \u003cp\u003e\n        \u003cstrong\u003eMEASUREMENT MODES - \u003c\/strong\u003eThis rugged, water resistant, and compact meter is perfect for single (spot checking areas) or continuous measurements of ePPFD; DLI; and photoperiod. The DLI-600 meter has two different screen modes to display the measurements: 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 ePPFD from the last 2.5 seconds. Measuring and controlling the DLI and the hours of light a plant receives (photoperiod) is critical for optimizing plant health, triggering flowering, and inducing other plant morphology effects. ePPFD, DLI, and photoperiod data can be viewed onscreen or downloaded via USB-C cable for analysis.\n    \u003c\/p\u003e\n    \u003cp\u003e\n        \u003cstrong\u003eRUGGED \u0026amp; READY TO USE - \u003c\/strong\u003eBuilt tough and rated IP65 to withstand harsh and humid environments, the DLI-600 can be carried around for spot checking, placed directly on any level surface, or mounted by attaching to commonly available camera tripods, clamps, or stakes using the standard 1\/4-20 threaded port on the bottom. The DLI meters consist of a cast acrylic diffuser (filter), optical filter, photodiode, signal processing circuitry, and an LCD display mounted in an ASA plastic housing. Each DLI package includes the meter, a protective carrying case, two AAA batteries, a quickstart instruction guide, a screwdriver, a soil spike for easy mounting, and a USB-C cable for downloading the meter's stored data as a CSV file to a computer. \n    \u003c\/p\u003e\n    \u003cp\u003e\n        \u003cstrong\u003eMADE IN THE USA - \u003c\/strong\u003eAll meters are designed, built, and calibrated at our headquarters in Logan, Utah, USA. Apogee Instruments has been creating research-grade instruments for scientists and serious growers for over 25 years. All meters are backed by our industry leading four-year warranty and supported by our world-class, US-based customer support team.\n    \u003c\/p\u003e\n    \u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eApogee Instruments DLI-600 Specs\u003c\/strong\u003e\u003c\/p\u003e\n\n    \u003cul style=\"list-style-type: none; padding-left: 18px;\"\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCalibration Uncertainty\u003c\/strong\u003e: ± 5 %\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMeasurement Repeatability\u003c\/strong\u003e: Less than 0.5 %\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 0 to 4000 µmol mˉ² sˉ¹\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLong-term Drift\u003c\/strong\u003e: Less than 2 % per year\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eField of View\u003c\/strong\u003e: 180˚\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSpectral Measurement Range (± 5 nm)\u003c\/strong\u003e: 394 to 747 nm\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDirectional (Cosine) Response\u003c\/strong\u003e: ± 5 % at 75˚ zenith angle\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTemperature Response\u003c\/strong\u003e: -0.11 ± 0.04 % per C\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eResponse Time\u003c\/strong\u003e: 2.5 seconds\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMeasurement Frequency\u003c\/strong\u003e: 3 minutes\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eData Log Capacity\u003c\/strong\u003e: 99 days (DLI \u0026amp; Photoperiod), 10 days (30 min PPFD\/ePPFD averages)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNon-linearity\u003c\/strong\u003e: Less than 1 % (up to 4000 µmol mˉ² sˉ¹)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStored Data Resolution (PPFD)\u003c\/strong\u003e: 0.1 µmol mˉ² sˉ¹ (when ≥ 1000, the screen will not display the decimal)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStored Data Resolution (DLI)\u003c\/strong\u003e: 0.1 mol mˉ² dayˉ¹\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStored Data Resolution (Photoperiod)\u003c\/strong\u003e: 0.1 hours\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eConnectivity\u003c\/strong\u003e: CSV file via USB-C data transfer\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eADC Resolution\u003c\/strong\u003e: 24 bits\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOperating Environment\u003c\/strong\u003e: -40 to 70 C; 0 to 100 % relative humidity\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eIngress Protection\u003c\/strong\u003e: IP65\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMounting Compatibility\u003c\/strong\u003e: Brass 1\/4-20 threaded mount\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eBattery Life\u003c\/strong\u003e: Approximately 6 months\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDimensions\u003c\/strong\u003e 1.91 W x 2.31 H x 0.93 D (inches)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMass\u003c\/strong\u003e: 67 g\u003c\/li\u003e\n        \u003cli\u003e\u003cstrong\u003eWarranty 4 years against defects in materials and workmanship\u003c\/strong\u003e\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eManufactured\u003c\/strong\u003e: Assembled in the USA\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Apogee Instruments","offers":[{"title":"Default Title","offer_id":51065617613078,"sku":"DLI-600","price":599.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0910\/5912\/6550\/files\/DLI-600_1.webp?v=1772235699","url":"https:\/\/hydrobuilder.com\/products\/apogee-instruments-dli-600-epar-daily-light-integral-and-photoperiod-meter-400-750-nm","provider":"Hydrobuilder","version":"1.0","type":"link"}