{"product_id":"hanna-groline-hydroponics-ph-tester-hi98115","title":"Hanna GroLine Hydroponics pH Tester HI98115","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Hanna Instruments GroLine Hydroponics pH Tester HI98115 is a compact, easy-to-use meter designed for routine pH testing of hydroponic nutrient solutions, irrigation water, fertilizer mixtures, and other liquid growing solutions. Its simple one-button interface controls power, calibration, and setup, making it a practical choice for home growers, greenhouses, indoor gardens, and commercial hydroponic facilities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI98115 measures across the complete 0.00 to 14.00 pH range and includes automatic one- or two-point calibration with buffer recognition. A large LCD displays the current measurement, stability indicator, calibration tags, and low-battery status. The included HI1271 gel-filled pH electrode is replaceable, allowing growers to restore meter performance without replacing the entire tester.\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\u003eDesigned for hydroponics:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides quick pH spot checks in nutrient reservoirs, mixing containers, irrigation water, and fertilizer solutions.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSimple one-button operation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e One control handles power, calibration, and automatic shutoff settings.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFull pH measurement range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Measures from 0.00 to 14.00 pH.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAutomatic calibration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports one- or two-point calibration with automatic recognition of pH 4.01, 7.01, and 10.01 buffers.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eReplaceable electrode:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The HI1271 electrode can be replaced when aging or damage begins affecting performance.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eNarrow probe tip:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The electrode tapers to approximately 8 mm at the sensing end for use in test tubes, vials, and containers with small openings.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStability indicator:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e An hourglass symbol remains visible until the measurement has stabilized.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCalibration tags:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The display identifies the buffer values used during the most recent calibration.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLow-battery warning:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e An onscreen indicator alerts the user when battery power is running low.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSelectable automatic shutoff:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Choose an 8-minute or 60-minute shutoff interval, or disable the function.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLong battery life:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides approximately 1,000 hours of operation from one replaceable CR2032 lithium battery.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eProtective carrying case:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Keeps the meter, electrode, calibration supplies, and cleaning supplies organized between uses.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\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 HI98115\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMeasured parameter:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e pH\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 14.00 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 ±0.2 pH at 25°C \/ 77°F\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCalibration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Automatic one- or two-point calibration\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRecognized buffers:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e pH 4.01, 7.01, and 10.01\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElectrode:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Replaceable Hanna HI1271 gel-filled pH electrode\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElectrode tip diameter:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 8 mm at the sensing end\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAutomatic shutoff:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 8 minutes, 60 minutes, or disabled\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\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOperating 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\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMaximum relative humidity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 95%\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMeter warranty:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e One year\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eElectrode warranty:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Six months\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eBefore the First Use\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI1271 electrode is shipped dry and must be conditioned before calibration and measurement:\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eRemove the protective storage cap.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse away any visible salt crystals with clean water. These deposits are normal for a pH electrode.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImmerse the lower portion of the electrode in fresh pH 7.01 buffer solution for several hours.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode with purified water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerform a one- or two-point calibration before testing a nutrient solution.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eProper conditioning hydrates the sensing glass and helps the electrode deliver a stable response.\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 the best accuracy within the typical hydroponic range, perform a two-point calibration using fresh pH 7.01 and pH 4.01 buffers:\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode with purified water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePress and hold the ON\/OFF button until “CAL” appears.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlace the electrode tip into fresh pH 7.01 buffer.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStir gently and wait for the stability indicator to disappear.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eContinue to the second calibration point when pH 4.01 begins flashing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode and place it into fresh pH 4.01 buffer.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWait for the reading to stabilize and for the calibration to save automatically.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConfirm that the calibration tags appear on the display.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA one-point calibration may be completed with pH 4.01, 7.01, or 10.01 buffer. Two-point calibration is recommended when greater accuracy is needed because it brackets the expected nutrient-solution pH.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNever reuse calibration solution or return used buffer to its original container.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHow to Measure Nutrient-Solution pH\u003c\/span\u003e\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eConnect the HI1271 electrode to the meter.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePress the ON\/OFF button to turn on the tester.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove the protective cap and rinse the probe with purified water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImmerse the sensing end in the nutrient solution without exceeding the marked maximum immersion level.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStir the solution gently with the probe.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWait for the hourglass stability indicator to disappear.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecord the displayed pH value.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode after testing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdd several drops of electrode storage solution to the protective cap and reinstall it.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTest a representative, well-mixed sample. Avoid measuring immediately beside a concentrated nutrient or pH-adjuster injection point.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eReplaceable HI1271 Electrode\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003epH electrodes gradually lose performance as their glass ages and the reference junction becomes contaminated. The replaceable HI1271 electrode allows the useful life of the meter to continue after the original probe becomes slow, unstable, damaged, or unable to calibrate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eReplace the electrode if proper cleaning, conditioning, and fresh calibration buffers do not restore acceptable performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe narrow probe design also makes it suitable for sampling from:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eNutrient reservoirs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMixing containers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIrrigation tanks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTest tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSample vials\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSmall calibration containers\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eElectrode Care and Storage\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode with purified water before calibration and between samples.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDo not exceed the marked maximum immersion level.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep the probe connector clean and dry.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNever wipe or rub the glass sensing tip.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIf calibration produces an error, soak the probe in Hanna cleaning solution for approximately 15 minutes.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAfter cleaning, rinse the probe and condition it in electrode storage solution for at least one hour before recalibrating.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep several drops of Hanna electrode storage solution inside the protective cap.\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 buffer for every calibration.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibrate and measure at similar temperatures to reduce measurement error.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReplace the HI1271 electrode if cleaning and conditioning no longer restore proper calibration.\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 HI98115 GroLine Hydroponics pH Tester\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReplaceable Hanna HI1271 pH electrode\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\u003eElectrode-cleaning solution sachets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCR2032 lithium battery\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDurable plastic carrying case\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuality certificate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstruction manual\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\u003eThe HI98115 measures pH only; it does not measure EC, TDS, nutrient concentration, or temperature.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThis is a handheld spot-testing meter rather than a continuous reservoir monitor.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe 0.01 pH display resolution should not be confused with its specified accuracy of ±0.2 pH.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe probe does not provide automatic temperature compensation, so calibrate and test solutions at similar temperatures.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse a separate conductivity or TDS meter when nutrient-strength measurements are also required.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFollow crop- and growth-stage-specific guidance when selecting a target nutrient-solution pH.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":32087028749,"sku":"HI98115","price":69.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1298\/4199\/products\/HANNA_-GroLine-Hydroponics-pH-Tester-Hanna-Instruments-1670616653.jpg?v=1670616654","url":"https:\/\/www.gardensupplyguys.com\/products\/hanna-groline-hydroponics-ph-tester-hi98115","provider":"GARDEN SUPPLY GUYS","version":"1.0","type":"link"}