{"product_id":"growlink-esm2-climate-sensor-w-co2","title":"Growlink ESM2 Climate Sensor w\/CO2","description":"\u003ch2\u003eGrowlink ESM-2 Climate Sensor for CO2, Humidity, Temperature, and Pressure\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThe ESM-2 is a modular \u003cstrong\u003e4-in-1 probe\u003c\/strong\u003e that reads CO2, humidity, temperature, and pressure on one hardwired \u003cstrong\u003eRS485 daisy chain\u003c\/strong\u003e. Power runs on \u003cstrong\u003e15-30 VDC\u003c\/strong\u003e from the Growlink control panel. The sensing module unscrews from the body for swap-out at calibration intervals. Each unit ships with a unique MAC address printed on the box. The chain map matches a known room and chain position from the start.\u003c\/p\u003e\n\u003ch2\u003eClimate Sensor Built for Canopy-Level Grow Room Monitoring\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\"\u003eThe ESM-2 sits at or slightly above canopy height to read the air the plants actually breathe. CO2 measuring ranges run \u003cstrong\u003e0-2000, 0-5000, or 0-10000 ppm\u003c\/strong\u003e with ±50 ppm + 2% accuracy on the 2000 ppm range. Humidity tracks \u003cstrong\u003e0-95% RH\u003c\/strong\u003e non-condensing with ±3% accuracy across 20-80% RH at 25°C. A 120Ω terminating resistor at the last junction box keeps the RS485 daisy chain stable in noisy grow environments.\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\u003e4-in-1 Probe:\u003c\/strong\u003e Measures CO2, humidity, temperature, and pressure from a single sensor body at canopy height.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRS485 Daisy Chain:\u003c\/strong\u003e Hardwired daisy chain reduces interference and dropouts vs. wireless mesh sensors in dense grow rooms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15-30 VDC Power:\u003c\/strong\u003e Runs on the Growlink control panel's existing 14 AWG plus\/minus conductor pair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaceable Sensing Module:\u003c\/strong\u003e The sense element unscrews from the body for calibration swap-outs without pulling the whole unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable CO2 Range:\u003c\/strong\u003e Configure 0-2000, 0-5000, or 0-10000 ppm depending on whether the room is ambient or CO2-enriched.\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;\"\u003eCO2, humidity, temperature, pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCO2 Ranges\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0-2000 ppm \/ 0-5000 ppm \/ 0-10000 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% of measured value (0-2000 ppm range)\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 - 95% 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;\"\u003ePower Input\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e15-30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePower Wiring\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e14 AWG +\/- conductors from Growlink control panel\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;\"\u003eRS485 daisy chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCable Type\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eTwisted shielded pair, 100-130Ω impedance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eChain Termination\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e120Ω resistor at last junction box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSensing Module\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eReplaceable (unscrews from body)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eIdentification\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eUnique MAC address printed on each unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fff;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCompatible Controllers\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eGrowlink environmental control panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Growlink","offers":[{"title":"Default Title","offer_id":48240788570326,"sku":"ESM2","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/9450\/6454\/files\/Growlink_ESM2_Climate_Sensor_w_CO2_main_image.webp?v=1778720327","url":"https:\/\/growershouse.com\/products\/growlink-esm2-climate-sensor-w-co2","provider":"GrowersHouse","version":"1.0","type":"link"}