{"product_id":"apera-instruments-5051-salinity-pen-tester","title":"Apera Instruments 5051 Salinity Pen Tester – Pocket-Size Water Quality Meter","description":"\u003ch1\u003eApera Instruments 5051 Compact Salinity Pen Tester\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eApera 5051\u003c\/strong\u003e is a pocket-size salinity pen tester built for fast, reliable salinity checks in the field, lab, or at home. Part of the Eco Series, it features a \u003cstrong\u003ededicated fixed salinity sensor\u003c\/strong\u003e optimized for rapid stabilization and accurate readings — no complex setup, no multi-parameter confusion. Slim enough to slip into a shirt pocket, the 5051 is the go-to tool for routine salinity monitoring across pools, aquariums, irrigation, and general water quality applications.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the Apera 5051?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated Salinity Sensor\u003c\/strong\u003e — fixed, parameter-specific probe delivers fast stabilization and accurate readings without cross-parameter interference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Compact \u0026amp; Lightweight\u003c\/strong\u003e — approx. 0.5 lbs; fits in any pocket or field kit for true on-the-go testing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple Point-and-Read Operation\u003c\/strong\u003e — no complex menus; instant salinity verification for everyday users and field technicians\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-Effective\u003c\/strong\u003e — professional-grade accuracy at an economical price point; no lab instrument required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Maintenance\u003c\/strong\u003e — rinse and store at room temperature (15–25°C); minimal upkeep required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSwimming pools and spas: salinity monitoring for salt-chlorine generators\u003c\/li\u003e\n\u003cli\u003eFreshwater and saltwater aquariums: routine salinity checks\u003c\/li\u003e\n\u003cli\u003eIrrigation and agriculture: soil water salinity screening\u003c\/li\u003e\n\u003cli\u003eEnvironmental field monitoring: general water quality verification\u003c\/li\u003e\n\u003cli\u003eFood and beverage: basic brine and salinity checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eEco Series Model Comparison\u003c\/h2\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5021\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConductivity (EC)\u003c\/td\u003e\n\u003ctd\u003eGeneral water conductivity \u0026amp; hydroponics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5031\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTDS\u003c\/td\u003e\n\u003ctd\u003eDrinking water, RO systems, purity checks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5041\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eORP\u003c\/td\u003e\n\u003ctd\u003ePools, spas, disinfection monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong style=\"color:#cc2200;\"\u003e5051\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color:#cc2200;\"\u003eSalinity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color:#cc2200;\"\u003eGeneral salinity monitoring\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5052\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSaltwater Salinity\u003c\/td\u003e\n\u003ctd\u003eSaltwater aquariums \u0026amp; marine testing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5053\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNaCl Salinity\u003c\/td\u003e\n\u003ctd\u003eSodium chloride concentration checks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasured Parameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFixed, dedicated salinity sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle Unit (1-EA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Conditions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15–25°C (room temperature)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEco Series Compact Pen Testers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"APERA Instruments","offers":[{"title":"Default Title","offer_id":44162463924311,"sku":"5051","price":52.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1555\/0581\/files\/5053_c3942939-84b2-41d7-bfb6-111bd79fa05b.avif?v=1786653987","url":"https:\/\/getultimatenow.com\/products\/apera-instruments-5051-salinity-pen-tester","provider":"Get Ultimate Now ","version":"1.0","type":"link"}