{"product_id":"hanna-halo2-groline-wireless-soil-ph-tester-hi9810302","title":"Hanna HALO2 GroLine Wireless Soil pH Tester HI9810302","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Hanna HALO2 GroLine Wireless Soil pH Tester HI9810302 is a compact, Bluetooth-enabled tester designed for measuring pH and temperature in soil, prepared soil samples, and soil slurries. Its specialized conical glass electrode penetrates damp soil and semisolid samples more easily than a conventional round-bulb pH probe, making it a practical tool for indoor gardens, greenhouses, hydroponic facilities, nurseries, and field applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUse the HI9810302 as a stand-alone tester with its dual-level LCD or connect it to the Hanna Lab App for expanded calibration, monitoring, documentation, and data-sharing capabilities. A built-in temperature sensor provides fast temperature readings and automatic temperature compensation for accurate pH measurement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSpecialized soil electrode:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The conical glass tip is designed to penetrate damp soil, soil slurries, and other semisolid growing media.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eWireless connectivity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Integrated Bluetooth technology connects the tester to compatible smartphones and tablets.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStand-alone operation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Displays pH, temperature, calibration status, stability, and battery information without requiring the app.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHanna Lab App support:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Access live readings, calibration history, electrode condition, alarms, reminders, notes, data logging, and sharing tools.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAccurate pH testing:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Measures from 0.00 to 12.00 pH with accuracy of ±0.05 pH at 25°C.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature measurement:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Measures sample temperature and applies automatic temperature compensation to the electrode response.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOpen double junction:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps reduce clogging and improves performance when testing soil and other demanding samples.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRemovable junction sleeve:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Allows the junction to be cleaned and the gel electrolyte refreshed as needed.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDurable PVDF body:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Resists abrasion, ultraviolet exposure, fungal growth, and many commonly used chemicals.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eIP65-rated housing:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides protection from dust, particles, and water jets for greenhouse and outdoor testing.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePortable design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Compact construction and single-button operation make routine spot checks convenient.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eMeasurement Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e HI9810302\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003epH range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.00 to 12.00 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 or 0.1 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 25°C\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.0 to 60.0°C \/ 32.0 to 140.0°F\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°C \/ 0.1°F\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTemperature accuracy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ±0.5°C \/ ±0.9°F\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; manual compensation is available through the Hanna Lab App\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCalibration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Up to three points as a stand-alone tester or four points through the Hanna Lab App\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElectrode body:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e PVDF\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElectrode tip:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Conical low-temperature glass\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eJunction:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Open, double junction with removable sleeve\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eReference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ag\/AgCl with refillable gel electrolyte\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eIngress protection:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e IP65\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBattery:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Replaceable CR2032 lithium battery\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEstimated battery life:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 1,000 hours or 500 hours with Bluetooth enabled\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRecommended operating environment:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0 to 50°C \/ 32 to 122°F\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eHanna Lab App Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eConnecting the tester to the Hanna Lab App turns a compatible smartphone or tablet into an expanded pH measurement interface. Available functions include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eLive pH and temperature readings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElectrode-condition monitoring\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTime-stamped calibration data\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibration reminders\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustable stability criteria\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003epH, mV, and temperature alarms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMeasurement tagging and notes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTester identification\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eData logging and sharing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eManual temperature compensation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExpanded four-point calibration\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe tester may also be used independently when wireless features or data logging are not required.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHow to Calibrate\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor most soil applications, use fresh pH 7.01 and pH 4.01 calibration buffers:\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eRemove the storage cap and rinse away any storage solution or salt deposits.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode tip with purified water and gently blot it dry without rubbing the glass.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEnter calibration mode by pressing and holding the ON\/OFF button.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBegin with pH 7.01 buffer and wait for the tester to recognize and store the stable reading.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode and place it in fresh pH 4.01 buffer.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWait for the second calibration point to stabilize and save.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReturn the tester to measurement mode.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUse separate rinse and calibration containers when working from bottles. Never return used buffer to the original container. When using the Hanna Lab App, follow the app-guided procedure for calibration at up to four points.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHow to Measure Soil pH Directly\u003c\/span\u003e\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eInspect the electrode and confirm that the bridge electrolyte gel has not dried out.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibrate the tester with fresh buffers appropriate for the expected pH range.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse a soil auger or suitable tool to create a pilot hole approximately 20 mm wide.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMake each test hole to a consistent depth when comparing multiple locations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdd a small amount of distilled or deionized water so the soil is damp but not saturated.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode with tap water and carefully insert it into the prepared hole.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eObserve the recommended immersion level and wait for the stability indicator.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecord the pH and temperature using the LCD or Hanna Lab App.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGently rinse away remaining soil after the measurement. Do not scrape or wipe the glass tip.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDo not force the electrode directly into hard, compacted, or rocky ground. Doing so can damage the glass tip. For difficult soil, collect a representative sample and prepare it with Hanna HI7051 Soil Preparation Solution according to Hanna’s directions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eUnderstanding the Results\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe preferred pH range varies by plant species, substrate, fertilizer program, and cultivation method. Soil-grown vegetables, tropical houseplants, orchids, container crops, and soilless media may require different targets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCompare each reading with the recommended range for the specific crop and medium. If adjustment is necessary, consider soil composition, alkalinity, irrigation water, and existing nutrient conditions before applying lime, sulfur, or another pH amendment.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eElectrode Care and Storage\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRinse the probe between samples to prevent cross-contamination.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNever exceed the marked maximum immersion level.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDo not rub or wipe the sensitive glass tip.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClean sluggish electrodes in an appropriate Hanna cleaning solution for approximately 20 minutes.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAfter cleaning, rinse the probe and hydrate it in electrode storage solution for at least 30 minutes before calibration.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the glass tip and junction hydrated with Hanna electrode storage solution.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNever store the electrode in distilled or deionized water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse fresh calibration buffers for dependable results.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove and clean the junction sleeve and replenish the gelled bridge electrolyte when performance requires it.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHandle the conical glass electrode carefully when testing dense media.\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 HI9810302 HALO2 GroLine Wireless Soil pH Tester\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003epH 4.01 calibration buffer sachets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003epH 7.01 calibration buffer sachets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCleaning solution for soil deposits\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCleaning solution for humus deposits\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElectrode storage solution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGelled bridge electrolyte\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCR2032 lithium battery\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBattery safety information\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuick-reference guide\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstrument 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 instrument measures pH and temperature; it does not measure soil fertility, nutrient concentration, EC, TDS, or moisture.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAutomatic temperature compensation corrects the electrode response for temperature but does not convert the sample’s pH to a different reference temperature.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConsistent sampling depth and soil moisture improve comparison between locations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDirect testing is intended for damp, penetrable soil—not dry, rocky, or heavily compacted ground.\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFollow crop- and medium-specific guidance when interpreting results or making pH adjustments.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":44516961779876,"sku":"HI9810302","price":148.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1298\/4199\/files\/HANNA_-GroLine-HALO2-Wireless-Soil-pH-Tester-1689458499198.jpg?v=1689458500","url":"https:\/\/www.gardensupplyguys.com\/products\/hanna-halo2-groline-wireless-soil-ph-tester-hi9810302","provider":"GARDEN SUPPLY GUYS","version":"1.0","type":"link"}