{"product_id":"hanna-groline-hydroponic-nutrient-monitor-hi981420-01","title":"Hanna GroLine Hydroponic Nutrient Monitor HI981420-01","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Hanna GroLine Hydroponic Nutrient Monitor HI981420-01 provides continuous, around-the-clock measurement of pH, electrical conductivity, TDS, and solution temperature. Designed for hydroponic reservoirs, aquaponic systems, greenhouses, fertigation tanks, and other controlled growing environments, it helps growers recognize changing root-zone conditions before they become larger crop problems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe included HI1285-8 multiparameter probe combines pH, EC\/TDS, and temperature sensors in one durable body. Measurements are automatically recorded every 15 minutes, while the large backlit display provides current readings, trend graphs, alarm notifications, and stored measurement history.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eContinuous four-parameter monitoring:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Tracks pH, EC, TDS, and nutrient-solution temperature from one probe.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAutomatic data logging:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Records measurements every 15 minutes and stores up to 30 days of history.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTrend identification:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Displays minimum, maximum, and average measurements to help identify recurring changes.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSelectable EC or TDS display:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e View nutrient concentration as mS\/cm, 500-scale ppm, or 700-scale ppm.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eQuick Cal compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Calibrates pH and conductivity simultaneously using Hanna Quick Cal solution.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTraditional calibration options:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports standard pH buffers and separate EC calibration solutions when preferred.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh and low alarms:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The display flashes when a monitored parameter moves outside the programmed range.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMultiple display modes:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Shows all essential readings together, cycles through individual parameters, or displays real-time graphs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eUSB-C data export:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Transfers stored information to a compatible flash drive or computer in CSV format.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eGood Laboratory Practice data:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Stores information from the five most recent pH and EC calibrations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAutomatic temperature compensation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Adjusts pH and conductivity measurements for solution temperature.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElectrical-noise resistance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The probe’s built-in preamplifier helps protect the pH signal from transient interference caused by pumps, ballasts, and other grow-room equipment.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePlant-friendly display:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Green backlighting provides clear visibility without an excessively bright grow-room display.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAutomatic dimming:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e An ambient light sensor adjusts the display backlight according to surrounding conditions.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eIP65-rated monitor enclosure:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Resists dust and low-pressure water jets when properly installed.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eParameters Monitored\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI981420-01 continuously measures four essential characteristics of a hydroponic nutrient solution:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003epH:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Indicates whether the solution is within the desired acidity or alkalinity range for nutrient availability.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElectrical Conductivity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Measures the solution’s ability to conduct electricity and provides an indication of dissolved ionic nutrient concentration.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTDS:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Converts the conductivity measurement into an estimated parts-per-million concentration using either a 0.5 or 0.7 conversion factor.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps growers monitor root-zone conditions and is used for automatic pH and EC temperature compensation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis monitor measures the overall concentration of dissolved ionic material. It does not identify the concentration of individual elements such as nitrogen, phosphorus, potassium, calcium, or magnesium.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMeasurement Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMonitor pH Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.00–14.00 pH\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eIncluded Probe pH Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.00–13.00 pH\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003epH Resolution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.01 pH\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003epH Accuracy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ±0.05 pH at 77°F\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEC Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.00–10.00 mS\/cm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEC Resolution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.01 mS\/cm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEC Accuracy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ±0.10 mS\/cm from 0.00–5.00 mS\/cm and ±0.20 mS\/cm from 5.00–10.00 mS\/cm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e500-Scale TDS Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0–5,000 ppm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e700-Scale TDS Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0–7,000 ppm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTDS Resolution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 10 ppm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTDS Accuracy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ±2% of full scale\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMonitor Temperature Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 32–140°F, or 0–60°C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eIncluded Probe Temperature Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 32–122°F, or 0–50°C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature Resolution:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.1°F or 0.1°C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature Accuracy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ±1°F or ±0.5°C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature Compensation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Automatic\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEC Temperature Coefficient:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1.9% per °C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLogging Interval:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Every 15 minutes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStored History:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to 30 days\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eConnectivity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e USB Type-C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePower Supply:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Included 12 VDC adapter with U.S. plug\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMonitor Enclosure:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e IP65\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOperating Environment:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 32–122°F with up to 95% relative humidity, non-condensing\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eHI1285-8 Multiparameter Probe\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe included HI1285-8 combines three sensors into one immersion-style probe:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePreamplified pH electrode\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRenewable cloth reference junction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGel electrolyte\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwo graphite conductivity electrodes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntegrated temperature sensor\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePolypropylene body\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDIN monitor connection\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eApproximately 6.6-foot cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIP68 rating for continuous immersion up to approximately 6.6 feet\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecommended for hydroponic, aquaponic, and greenhouse nutrient reservoirs\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe solid-state preamplifier helps protect the pH measurement from transient electrical noise created by pumps, grow-light ballasts, and similar equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis immersion probe is intended for use in tanks and reservoirs. Growers requiring a threaded probe for permanent pipe installation should consider the HI981421 model with its HI1285-9 inline probe.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDisplay and Data History\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe large LCD can be configured to show:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003epH, EC or TDS, and temperature simultaneously\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIndividual parameters in a repeating three-second cycle\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReal-time measurement graphs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStored historical graphs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum, maximum, and average readings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh and low alarm messages\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibration information\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCurrent date and time\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe monitor retains settings and operating parameters in nonvolatile memory. Programmed settings remain stored if power is temporarily interrupted, although continuous measurement and logging require the power adapter to remain connected.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAutomatic Data Logging\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eMeasurements are automatically recorded every 15 minutes for the previous 30 days. Stored data includes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003epH\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTDS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTemperature\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum values\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum values\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAverage values\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMeasurement and alarm status\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHistorical data can be reviewed directly on the monitor or exported through its USB-C connection. Exported CSV files can be opened with common spreadsheet software for reviewing trends, documenting crop cycles, or comparing reservoir performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe USB-C connection is intended for data transfer. It does not provide Wi-Fi, Bluetooth, cloud storage, app notifications, or remote internet monitoring.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCalibration Options\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI981420-01 supports two calibration approaches.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQuick Cal Calibration\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHanna Quick Cal solution allows a simultaneous one-point calibration of pH and conductivity. This simplifies regular maintenance by placing the clean probe into one compatible calibration solution.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eStandard pH Calibration\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe pH sensor supports automatic one- or two-point calibration using:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003epH 4.01 buffer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003epH 7.01 buffer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003epH 10.01 buffer\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTwo-point calibration is recommended when greater confidence is needed across the expected operating range.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eStandard EC Calibration\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe conductivity sensor supports automatic one-point calibration using:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1.41 mS\/cm conductivity standard\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e5.00 mS\/cm conductivity standard\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTDS calibration is completed through the EC calibration because the displayed ppm value is calculated from the conductivity measurement and selected conversion factor.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eGLP Calibration Records\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Good Laboratory Practice feature stores data from the five most recent pH and EC calibrations. This helps growers confirm when the probe was calibrated and identify maintenance patterns that could affect measurement reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eUnderstanding the TDS Scales\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe monitor offers two selectable conductivity-to-TDS conversion factors:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e500 ppm scale:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Uses a 0.5 conversion factor\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e700 ppm scale:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Uses a 0.7 conversion factor\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor example, an EC measurement of 2.0 mS\/cm corresponds to approximately:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1,000 ppm on the 500 scale\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1,400 ppm on the 700 scale\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSelect the scale used by the applicable fertilizer manufacturer, feeding chart, or previous meter. Switching conversion factors changes the displayed ppm number but does not change the actual conductivity of the solution.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHigh and Low Alarms\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eGrowers can establish individual high and low alarm limits for:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003epH\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEC or TDS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTemperature\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhen a measurement moves outside the selected range, the monitor flashes its display and presents an alarm message. Each parameter’s alarms can be enabled or disabled separately.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThese alarms are displayed locally on the monitor. The HI981420-01 does not automatically add nutrients, adjust pH, activate external dosing equipment, or send remote notifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eInstallation Guidelines\u003c\/span\u003e\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eMount the monitor vertically at eye level on a stable, vibration-free wall.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePosition it within reach of the probe cable and an appropriate power outlet.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the monitor away from direct sunlight, continuous dripping, condensation, and excessive heat.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConnect the HI1285-8 probe while the monitor is powered off.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove the probe’s protective storage cap.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse away any storage solution before calibration or reservoir installation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibrate the pH and conductivity sensors.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlace the probe where it remains continuously immersed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChoose a location with representative circulation and minimal air bubbles.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the probe away from concentrated nutrient or pH-adjuster injection points.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConfigure the measurement units, TDS scale, alarm limits, date, time, and display preferences.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDo not place the monitor enclosure in the reservoir. The IP65 enclosure resists dust and low-pressure water jets, but it is not submersible. Only the properly connected HI1285-8 probe is intended for continuous immersion.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eProbe Care and Maintenance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRinse the complete probe with clean water approximately once per week.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the pH bulb, cloth junction, and graphite EC sensors for accumulated fertilizer residue.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClean the probe with Hanna HI700661 agricultural electrode cleaning solution when deposits are present.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAfter cleaning, soak the probe in Hanna HI70300 electrode storage solution for approximately one hour.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse away storage solution before calibration because it is highly conductive.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecalibrate after cleaning.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the pH bulb and reference junction moist.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNever store the pH electrode in distilled, deionized, or reverse-osmosis water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrevent concentrated fertilizer, pH adjusters, or undiluted additives from contacting the probe.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReplace the probe when it can no longer maintain calibration after proper cleaning and conditioning.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eWhat Is Included\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHanna GroLine HI981420 monitor\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHI1285-8 pH, EC\/TDS, and temperature probe\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwo Hanna Quick Cal solution sachets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwo agricultural electrode cleaning solution sachets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e12 VDC power adapter with U.S. plug\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuick-start guide\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstruction manual\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMonitor quality certificate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProbe quality certificate\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Usage Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThis product monitors nutrient-solution conditions but does not perform automatic dosing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe monitor does not include Wi-Fi, Bluetooth, cloud connectivity, or remote alerts.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse the correct 500 or 700 ppm conversion factor when comparing readings with a feeding chart.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the probe continuously immersed during monitoring.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstall the probe where the sample represents the overall reservoir rather than a freshly dosed area.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the pH sensor hydrated with proper electrode storage solution.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibrate regularly and whenever readings appear questionable.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFollow Hanna’s current instructions for installation, calibration, cleaning, storage, and probe replacement.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":19339403853881,"sku":"HI981420","price":389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1298\/4199\/products\/HANNA_-GroLine-Nutrient-Monitor-for-pH_-EC_-TDS_-Temperature-Hanna-Instruments-1670272122.jpg?v=1670272124","url":"https:\/\/www.gardensupplyguys.com\/products\/hanna-groline-hydroponic-nutrient-monitor-hi981420-01","provider":"GARDEN SUPPLY GUYS","version":"1.0","type":"link"}