{"product_id":"growlink-sdi-12-climate-sensor","title":"Growlink SDI-12 Climate Sensor","description":"\u003ch2\u003eGrowlink SDI-12 Climate Sensor Built for PIC and Connect Controllers\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThe ESM-3 reports \u003cstrong\u003eair temperature, humidity, VPD, photocell, and optional CO2\u003c\/strong\u003e through one SDI-12 digital interface. Each SDI-12 input on a Precision Irrigation Controller supports one ESM-3 plus one substrate probe. A standalone PIC handles four climate sensors and four substrate probes at once. Temperature reads \u003cstrong\u003e-40 to 60°C\u003c\/strong\u003e with ±0.5°C accuracy. Humidity tracks \u003cstrong\u003e0-100% RH\u003c\/strong\u003e non-condensing with ±3% accuracy between 20-80% RH at 25°C.\u003c\/p\u003e\n\u003ch2\u003eEco Climate Sensor With Onboard Compensation and Low Power Draw\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eOptional CO2 measurement runs \u003cstrong\u003e0-5000 ppm\u003c\/strong\u003e with ±50 ppm + 2-3% accuracy. Onboard temperature and pressure compensation keeps the readings honest as the room swings through veg, bloom, and lights-out cycles. The sensor draws low current on +12VDC, so a single SDI-12 input on a PIC supplies both power and data with three conductors. Multiple ESM-3 readings can be averaged in the controller or kept separate for zone-by-zone canopy climate mapping.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul style=\"text-align: justify;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDI-12 Digital Output:\u003c\/strong\u003e One three-conductor cable carries +12VDC, signal, and ground from the controller to the sensor body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir T, RH, VPD, Photocell:\u003c\/strong\u003e Standard climate readings derived from the sensor's onboard array, with VPD computed on the controller side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional CO2 Channel:\u003c\/strong\u003e Adds 0-5000 ppm CO2 measurement with ±50 ppm + 2-3% of measured value accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePIC and Connect Compatible:\u003c\/strong\u003e Wires to any Growlink SDI-12 input or any third-party SDI-12 data logger that follows the spec.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnboard Compensation:\u003c\/strong\u003e Temperature and pressure compensation keeps the CO2 and humidity readings stable across day and night swings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: justify;\"\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #333; color: #fff;\"\u003e\n\u003cth style=\"padding: 8px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding: 8px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMeasurements\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eAir temperature, humidity, VPD, photocell, optional CO2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCommunication\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSDI-12 digital\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e+12VDC (supplied through SDI-12 input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e-40 to 60°C (-40 to 140°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e±0.5°C (±0.9°F at 5-60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eHumidity Range\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0 - 100% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eHumidity Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e±3% RH at 25°C, 20-80% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCO2 Range (Optional)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0 - 5000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCO2 Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e±50 ppm + 2-3% of measured value\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCompensation\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eOnboard temperature + pressure compensation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eWire Configuration\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBrown +12VDC \/ White signal \/ Blue ground (or equivalent color code)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCompatible Controllers\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePrecision Irrigation Controller (PIC), Connect Controller, any SDI-12 data logger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMulti-Sensor Use\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eUp to 4 ESM-3 per PIC, with averaging or per-sensor readings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Growlink","offers":[{"title":"Default Title","offer_id":48240788635862,"sku":"ESM3","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/9450\/6454\/files\/Growlink_SDI-12_Climate_Sensor_main_image.webp?v=1778721038","url":"https:\/\/growershouse.com\/products\/growlink-sdi-12-climate-sensor","provider":"GrowersHouse","version":"1.0","type":"link"}