{"product_id":"hanna-groline-hi98118-waterproof-hydroponic-ph-tester","title":"Hanna GroLine Waterproof Hydroponic pH Tester HI98118","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Hanna GroLine HI98118 Waterproof Hydroponic pH Tester provides a convenient way to measure pH and temperature in nutrient solutions, irrigation water, growing-media leachate, and prepared soil slurries. Its slim pocket-sized design, large dual-level display, automatic temperature compensation, and simple two-button operation make it an excellent everyday meter for hydroponic gardens, greenhouses, aquaponic systems, and container-grown plants.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI98118 displays pH and temperature simultaneously. A renewable cloth junction helps maintain electrode response when nutrient residue or suspended material begins to obstruct the reference pathway.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMeasures pH and temperature with one pocket-sized tester\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for hydroponic nutrient solutions and greenhouse applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWaterproof construction for humid growing environments\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAutomatic temperature compensation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLarge LCD displays pH and temperature simultaneously\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAutomatic one- or two-point pH calibration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompatible with Hanna GroLine Quick Calibration Solution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRenewable cloth junction helps clear clogs and extend electrode life\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStability indicator identifies when a reading is ready\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBattery percentage displayed at startup\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow-battery warning below approximately 10%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSelectable automatic shutoff\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSimple two-button operation\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eMeasurement Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eParameter\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eRange\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eResolution\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eAccuracy\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003epH\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.00 to 14.00 pH\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.01 pH\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±0.2 pH\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTemperature\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.0 to 50.0°C \/ 32.0 to 122.0°F\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.1°C \/ 0.1°F\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±0.5°C \/ ±1°F\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cspan\u003eDesigned for Hydroponics and Growing Media\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI98118 is designed primarily for testing liquid samples, including:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHydroponic nutrient solutions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAquaponic water\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIrrigation water\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFertilizer mixtures\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReservoir samples\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eContainer-media leachate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrepared soil or growing-media slurries\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe glass electrode should not be forced directly into dry or compacted soil. For growing-media testing, collect leachate using a pour-through method or prepare a soil-to-water slurry before taking the measurement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eRenewable Cloth Junction\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe reference junction creates the electrical pathway required for pH measurement. Fertilizer residue, mineral buildup, and fine particles can eventually obstruct this pathway and cause slow, drifting, or unstable readings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf conditioning, cleaning, and calibration do not correct an erratic response, approximately 3 mm or 1\/8 inch of the cloth junction can be carefully pulled out and the contaminated portion trimmed away. Always leave at least 3 mm of cloth extending beyond the reference compartment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHanna states that the cloth junction can be renewed approximately nine times. Recalibrate the meter after renewing the junction.\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 HI98118 supports two calibration modes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eQuick Cal:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Automatic one-point calibration using Hanna GroLine Quick Calibration Solution at pH 6.86.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStandard calibration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Automatic one- or two-point calibration using pH 4.01, 7.01, and 10.01 buffers.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor routine hydroponic measurements, calibrate with pH 7.01 followed by pH 4.01. These two standards bracket the mildly acidic range commonly used for hydroponic nutrient solutions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQuick Cal provides a fast routine calibration, but Hanna recommends two-point calibration when improved accuracy is required.\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\u003eRemove the protective cap.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode tip with purified water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImmerse the bottom portion of the tester in the sample.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGently stir to release trapped air and ensure even contact.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWait for the stability indicator to disappear.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRead the pH on the primary display and temperature on the secondary display.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode between samples to prevent cross-contamination.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdd storage solution to the protective cap and reinstall it after use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTest a well-mixed sample away from concentrated nutrients, pH adjusters, dosing outlets, and freshly added supplements.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTesting Soil or Growing Media\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI98118 should be used with a liquid extract rather than being pushed directly into the growing medium.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor a basic soil slurry:\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eCombine equal portions of soil or growing medium and distilled water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMix thoroughly.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAllow the mixture to rest so larger solids can settle.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlace the electrode into the liquid portion without forcing it into coarse material.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWait for the reading to stabilize.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA pour-through leachate method can also be used with container-grown plants. For consistent comparisons, use the same sampling method, water source, resting time, and soil-to-water ratio each time.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCleaning the Electrode\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eClean the electrode whenever readings become slow, unstable, or difficult to calibrate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor general residue:\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eSoak the electrode tip in Hanna General Purpose Cleaning Solution.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse thoroughly with distilled or deionized water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSoak the electrode in Hanna Storage Solution for at least one hour.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecalibrate before taking measurements.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDedicated cleaning solutions may be required for protein deposits, inorganic buildup, oil, or grease. Do not wipe or scrub the glass sensing bulb.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eProper Electrode Storage\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe pH electrode must remain hydrated. Add several drops of Hanna Electrode Storage Solution to the sponge inside the protective cap before storing the tester.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf storage solution is temporarily unavailable, pH 4.01 or pH 7.01 buffer may be used. Never store the electrode in distilled, deionized, or reverse-osmosis water. Pure water can damage the reference system and shorten electrode life.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf the electrode dries out, soak the sensing tip in storage solution before calibrating. A short rehydration may restore a recently dried electrode, while an electrode shipped dry or stored dry for an extended period may require several hours of conditioning.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCalibration Best Practices\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUse fresh calibration buffer.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePour buffer into a separate clean container.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNever return used buffer to its original container.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode between different buffers.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBegin two-point calibration with pH 7.01.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse pH 4.01 as the second point for typical hydroponic applications.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecalibrate after cleaning or renewing the cloth junction.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibrate more frequently when high accuracy is required.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eBattery and Automatic Shutoff\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe HI98118 operates on a replaceable CR2032 battery. The meter displays the remaining battery percentage during startup and provides a low-battery warning when power drops below approximately 10%.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAutomatic shutoff can be set for:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e8 minutes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e60 minutes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisabled\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe current Hanna product listing estimates approximately 1,000 hours of continuous battery operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat’s Included\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHanna GroLine HI98118 pH and temperature tester\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHanna GroLine Quick Calibration Solution sachets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eElectrode cleaning solution sachet\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProtective storage cap\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCR2032 battery\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\u003eRecommended Accessories\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor accurate readings and proper electrode care, pair the HI98118 with:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHanna GroLine Quick Calibration Solution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHanna GroLine pH 4.01 Calibration Buffer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHanna GroLine pH 7.01 Calibration Buffer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHanna General Purpose Cleaning Solution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHanna pH Probe Storage Solution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClean calibration and sample cups\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eRegular calibration, cleaning, and proper wet storage are essential for dependable pH measurements and long electrode life.\u003c\/span\u003e\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":32086688013,"sku":"HI98118","price":89.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1298\/4199\/products\/HANNA_-GroLine-Waterproof-Hydroponic-pH-Tester-Hanna-Instruments-1672087312.jpg?v=1672087313","url":"https:\/\/www.gardensupplyguys.com\/products\/hanna-groline-hi98118-waterproof-hydroponic-ph-tester","provider":"GARDEN SUPPLY GUYS","version":"1.0","type":"link"}