{"product_id":"dragino-wss-27","title":"Dragino WSS-27, PAR sensor 400 to 700 nm, RS485","description":"\u003cp\u003eThe Dragino WSS-27 measures the photosynthetically active radiation (PAR) of daylight in the wavelength range from 400 to 700 nm, which is precisely the portion of sunlight that plants use for photosynthesis. A precise optical detector with an upstream 400 to 700 nm filter provides a signal proportional to the incident radiation, with the measurement following the cosine of the angle of incidence. The sensor communicates via RS485 and is designed as an expansion sensor for the Dragino WSC2-L weather station.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eMeasurement of photosynthetic photon flux density (PPFD) in µmol\/(m²·s), measuring range 0 to 2500 µmol\/(m²·s)\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eSpectrally limited to 400 to 700 nm by an optical filter in front of the detector\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eRS485 interface with Modbus command set, can be operated directly on the WSC2-L main unit (standard baud rate 4800)\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eWide supply range from 5 to 24 V DC with low power consumption\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eHigh long-term stability with an annual drift of a maximum of ±2 %\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eSupply voltage: 5 to 24 V DC\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eInterface: RS485\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eStandard baud rate (with WSC2-L): 4800\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eSpectral range: 400 to 700 nm\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eMeasuring range: 0 to 2500 µmol\/(m²·s)\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eResolution: 1 µmol\/(m²·s)\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eAccuracy: ±2 %\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eLong-term stability: ≤ ±2 % per year\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eCurrent consumption: 5 mA at 12 V, 6 mA at 5 V\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eResponse time: 5 s\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eOperating temperature: -30 °C to +75 °C\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eOperating humidity: 10 to 90 % RH\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eDimensions: 15 × 11 × 6 cm\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eWeight: 338 g\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplication areas:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eAgricultural weather stations based on the Dragino WSC2-L for recording plant-available light\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eGreenhouses to control supplemental lighting or shading based on natural PAR input\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003ePlant cultivation and variety trials with determination of the Daily Light Integral (DLI) from PAR readings\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eForestry, ecology, and vegetation monitoring, e.g., light conditions under tree canopies or in canopy gaps\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDocuments:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/wiki.dragino.com\/docs\/Non-Wireless-Sensors\/agriculture-weather-stations\/wss-27-par-photosynthetically-available-radiation\/\" target=\"_blank\" rel=\"noopener\"\u003eUser Manual\u003c\/a\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Dragino","offers":[{"title":"Default Title","offer_id":55345642799431,"sku":"WSS-27","price":232.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/6561\/1847\/files\/WSS-27.jpg?v=1791477732","url":"https:\/\/exp-tech.de\/en\/products\/dragino-wss-27","provider":"EXP Tech","version":"1.0","type":"link"}