{"product_id":"grostar-gs1-ph-pen","title":"GroStar GS1 PH\/Temp (2-IN-1) Pen","description":"\u003ch1 data-end=\"34\" data-start=\"0\" data-section-id=\"1vtuf54\"\u003eGroStar GS1 pH\/Temp (2-in-1) Pen\u003c\/h1\u003e\n\u003cp data-end=\"502\" data-start=\"36\"\u003eThe GroStar GS1 pH\/Temp (2-in-1) Pen is a compact and reliable digital testing meter designed for accurately measuring both pH levels and temperature in hydroponic systems, reservoirs, nutrient solutions, aquariums, irrigation water, and horticultural applications. Built for growers, hydroponic gardeners, greenhouse operators, and cultivation facilities, the GS1 provides fast, easy-to-read measurements to help maintain optimal nutrient balance and water quality.\u003c\/p\u003e\n\u003cp data-end=\"821\" data-start=\"504\"\u003eCombining pH and temperature monitoring into one convenient handheld device, the GroStar GS1 helps simplify daily nutrient management while improving growing consistency and system performance. Its portable design, digital display, and user-friendly operation make it ideal for both beginner and professional growers.\u003c\/p\u003e\n\u003cp data-end=\"1108\" data-start=\"823\"\u003eAccurate pH management is critical for nutrient uptake in hydroponics and soil-based cultivation, while temperature monitoring helps growers maintain healthy root zone conditions. The GroStar GS1 delivers dependable readings for everyday water testing and nutrient solution monitoring.\u003c\/p\u003e\n\u003ch2 data-end=\"1121\" data-start=\"1110\" data-section-id=\"1d7mrtu\"\u003eFeatures\u003c\/h2\u003e\n\u003cul data-end=\"1500\" data-start=\"1122\"\u003e\n\u003cli data-end=\"1156\" data-start=\"1122\" data-section-id=\"r4zxf1\"\u003eMeasures both pH and temperature\u003c\/li\u003e\n\u003cli data-end=\"1202\" data-start=\"1157\" data-section-id=\"1y7znve\"\u003eCompact handheld 2-in-1 digital testing pen\u003c\/li\u003e\n\u003cli data-end=\"1231\" data-start=\"1203\" data-section-id=\"1t9v34k\"\u003eFast and accurate readings\u003c\/li\u003e\n\u003cli data-end=\"1262\" data-start=\"1232\" data-section-id=\"1n6xcf\"\u003eEasy-to-read digital display\u003c\/li\u003e\n\u003cli data-end=\"1310\" data-start=\"1263\" data-section-id=\"2mzjck\"\u003eIdeal for hydroponics and nutrient reservoirs\u003c\/li\u003e\n\u003cli data-end=\"1344\" data-start=\"1311\" data-section-id=\"1fpuloc\"\u003ePortable and lightweight design\u003c\/li\u003e\n\u003cli data-end=\"1388\" data-start=\"1345\" data-section-id=\"q1520g\"\u003eSuitable for irrigation and water testing\u003c\/li\u003e\n\u003cli data-end=\"1446\" data-start=\"1389\" data-section-id=\"cqzso3\"\u003eUser-friendly operation for beginners and professionals\u003c\/li\u003e\n\u003cli data-end=\"1500\" data-start=\"1447\" data-section-id=\"1n7p97t\"\u003eHelps optimize nutrient absorption and plant health\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"1517\" data-start=\"1502\" data-section-id=\"mu966k\"\u003eApplications\u003c\/h2\u003e\n\u003cul data-end=\"1745\" data-start=\"1518\"\u003e\n\u003cli data-end=\"1538\" data-start=\"1518\" data-section-id=\"70fxbh\"\u003eHydroponic systems\u003c\/li\u003e\n\u003cli data-end=\"1567\" data-start=\"1539\" data-section-id=\"1p3ze9w\"\u003eReservoir nutrient testing\u003c\/li\u003e\n\u003cli data-end=\"1597\" data-start=\"1568\" data-section-id=\"1ydivrf\"\u003eIrrigation water monitoring\u003c\/li\u003e\n\u003cli data-end=\"1622\" data-start=\"1598\" data-section-id=\"rl7p3v\"\u003eGreenhouse cultivation\u003c\/li\u003e\n\u003cli data-end=\"1659\" data-start=\"1623\" data-section-id=\"1yrm5dq\"\u003eSoil and nutrient solution testing\u003c\/li\u003e\n\u003cli data-end=\"1689\" data-start=\"1660\" data-section-id=\"4a5v4a\"\u003eAquariums and water gardens\u003c\/li\u003e\n\u003cli data-end=\"1709\" data-start=\"1690\" data-section-id=\"jz7zko\"\u003eIndoor grow rooms\u003c\/li\u003e\n\u003cli data-end=\"1745\" data-start=\"1710\" data-section-id=\"1ee0wt7\"\u003eCommercial cultivation facilities\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"1764\" data-start=\"1747\" data-section-id=\"1a3ueyz\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"2112\" data-start=\"1766\"\u003e\n\u003cthead data-end=\"1793\" data-start=\"1766\"\u003e\n\u003ctr data-end=\"1793\" data-start=\"1766\"\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"1782\" data-start=\"1766\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" data-col-size=\"sm\" data-end=\"1793\" data-start=\"1782\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"2112\" data-start=\"1804\"\u003e\n\u003ctr data-end=\"1846\" data-start=\"1804\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"1819\" data-start=\"1804\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd data-end=\"1846\" data-start=\"1819\" data-col-size=\"sm\"\u003eGroStar GS1 pH\/Temp Pen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"1891\" data-start=\"1847\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"1871\" data-start=\"1847\"\u003eMeasurement Functions\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"1891\" data-start=\"1871\"\u003epH \u0026amp; Temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"1922\" data-start=\"1892\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"1907\" data-start=\"1892\"\u003eDisplay Type\u003c\/td\u003e\n\u003ctd data-end=\"1922\" data-start=\"1907\" data-col-size=\"sm\"\u003eDigital LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"1964\" data-start=\"1923\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"1938\" data-start=\"1923\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-end=\"1964\" data-start=\"1938\" data-col-size=\"sm\"\u003eHandheld Digital Meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2021\" data-start=\"1965\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"1979\" data-start=\"1965\"\u003eApplication\u003c\/td\u003e\n\u003ctd data-end=\"2021\" data-start=\"1979\" data-col-size=\"sm\"\u003eHydroponics, Water Testing, Irrigation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2040\" data-start=\"2022\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2033\" data-start=\"2022\"\u003ePortable\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2040\" data-start=\"2033\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2076\" data-start=\"2041\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2055\" data-start=\"2041\"\u003eCalibration\u003c\/td\u003e\n\u003ctd data-end=\"2076\" data-start=\"2055\" data-col-size=\"sm\"\u003eUser Calibratable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2112\" data-start=\"2077\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2092\" data-start=\"2077\"\u003ePower Source\u003c\/td\u003e\n\u003ctd data-end=\"2112\" data-start=\"2092\" data-col-size=\"sm\"\u003eBattery Operated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-end=\"2129\" data-start=\"2114\" data-section-id=\"1xilxw6\"\u003eSEO Keywords\u003c\/h2\u003e\n\u003cp data-end=\"2454\" data-start=\"2130\"\u003eGroStar GS1 pH pen, GroStar pH and temperature meter, 2 in 1 pH temp pen, hydroponic pH meter, digital pH tester, nutrient solution tester, hydroponic water tester, irrigation water pH meter, greenhouse pH meter, reservoir temperature tester, portable pH pen, cultivation water testing meter, pH temp monitor for hydroponics\u003c\/p\u003e\n\u003ch2 data-end=\"2485\" data-start=\"2456\" data-section-id=\"1r8frcv\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 data-end=\"2537\" data-start=\"2487\" data-section-id=\"qk7a5g\"\u003eWhat does the GroStar GS1 pH\/Temp Pen measure?\u003c\/h3\u003e\n\u003cp data-end=\"2650\" data-start=\"2538\"\u003eThe GroStar GS1 measures both pH levels and temperature in water, nutrient solutions, and hydroponic reservoirs.\u003c\/p\u003e\n\u003ch3 data-end=\"2696\" data-start=\"2652\" data-section-id=\"vq48ll\"\u003eIs the GroStar GS1 good for hydroponics?\u003c\/h3\u003e\n\u003cp data-end=\"2834\" data-start=\"2697\"\u003eYes. The GS1 is designed for hydroponic growers who need accurate pH and temperature monitoring for nutrient management and plant health.\u003c\/p\u003e\n\u003ch3 data-end=\"2886\" data-start=\"2836\" data-section-id=\"nymonk\"\u003eWhy is pH monitoring important in hydroponics?\u003c\/h3\u003e\n\u003cp data-end=\"3018\" data-start=\"2887\"\u003eProper pH levels help plants absorb nutrients efficiently. Incorrect pH can lead to nutrient lockout and reduced plant performance.\u003c\/p\u003e\n\u003ch3 data-end=\"3069\" data-start=\"3020\" data-section-id=\"r2p8yg\"\u003eCan the GroStar GS1 test nutrient reservoirs?\u003c\/h3\u003e\n\u003cp data-end=\"3180\" data-start=\"3070\"\u003eYes. The meter is commonly used for testing hydroponic reservoirs, irrigation systems, and nutrient solutions.\u003c\/p\u003e\n\u003ch3 data-end=\"3214\" data-start=\"3182\" data-section-id=\"1pnt7c2\"\u003eIs the GroStar GS1 portable?\u003c\/h3\u003e\n\u003cp data-end=\"3334\" data-start=\"3215\"\u003eYes. The compact handheld design makes it easy to carry and use in grow rooms, greenhouses, and cultivation facilities.\u003c\/p\u003e\n\u003ch3 data-end=\"3381\" data-start=\"3336\" data-section-id=\"1yl3lm9\"\u003eDoes the GroStar GS1 require calibration?\u003c\/h3\u003e\n\u003cp data-end=\"3482\" data-start=\"3382\"\u003eYes. Like most digital pH meters, periodic calibration is recommended to maintain accurate readings.\u003c\/p\u003e\n\u003ch3 data-end=\"3526\" data-start=\"3484\" data-section-id=\"1fe3e94\"\u003eCan the GS1 measure water temperature?\u003c\/h3\u003e\n\u003cp data-end=\"3598\" data-start=\"3527\"\u003eYes. The device includes built-in temperature monitoring functionality.\u003c\/p\u003e\n\u003ch3 data-end=\"3646\" data-start=\"3600\" data-section-id=\"qq8aom\"\u003eIs the GroStar GS1 suitable for beginners?\u003c\/h3\u003e\n\u003cp data-end=\"3758\" data-start=\"3647\"\u003eYes. The simple digital display and easy operation make it suitable for both beginner and professional growers.\u003c\/p\u003e\n\u003ch3 data-end=\"3817\" data-start=\"3760\" data-section-id=\"14obgn7\"\u003eWhat industries commonly use pH and temperature pens?\u003c\/h3\u003e\n\u003cp data-end=\"3980\" data-start=\"3818\"\u003eThese meters are commonly used in hydroponics, greenhouse cultivation, indoor farming, aquariums, horticulture, irrigation management, and commercial agriculture.\u003c\/p\u003e\n\u003ch3 data-end=\"4032\" data-start=\"3982\" data-section-id=\"szo0oq\"\u003eCan the GroStar GS1 help improve plant growth?\u003c\/h3\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"4155\" data-start=\"4033\"\u003eMaintaining proper pH and water temperature can help optimize nutrient uptake, root health, and overall plant performance.\u003c\/p\u003e\n\u003cp\u003eLab grade instruments designed specifically for growers!\u003cbr\u003e\u003cbr\u003eIncludes: \u003cbr\u003e• 2-year warranty (instrument)\u003cbr\u003e• 1-year warranty (probe)\u003cbr\u003e• pH 7 \u0026amp; pH4 calibration solution (50ml bottle each)\u003cbr\u003e• KCL storage solution (10ml bottle)\u003cbr\u003e• Lanyard and user manual\u003c\/p\u003e\n\u003cp\u003eFeatures:\u003cbr\u003e• Measures pH and temperature\u003cbr\u003e• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance\u003cbr\u003e• Easy-to-use design and fast calibration adjustment\u003cbr\u003e• Double junction replaceable probe, so you don’t have to discard the entire pen when the probe reaches its end of life\u003cbr\u003e• Large 3-color backlit screen gives you clear information\u003cbr\u003e• IP67 waterproof rating\u003cbr\u003e• Powered by AAA batteries with auto off function\u003cbr\u003e• Automatic temperature compensation\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Hydrofarm","offers":[{"title":"Default Title","offer_id":41017510494265,"sku":"AI11010","price":92.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/6277\/5865\/files\/GroStar-GS1-pH-Pen-1683987611.jpg?v=1683987612","url":"https:\/\/seresag.com\/products\/grostar-gs1-ph-pen","provider":"Seres","version":"1.0","type":"link"}