{"product_id":"apera-instruments-5052-saltwater-salinity-pen-tester","title":"Apera Instruments 5052 Saltwater Salinity Pen Tester – Marine \u0026 Aquarium Meter","description":"\u003ch1\u003eApera Instruments 5052 Saltwater Salinity Pen Tester\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eApera 5052\u003c\/strong\u003e is a pocket-size saltwater salinity pen tester purpose-built for \u003cstrong\u003emarine and saltwater aquarium applications\u003c\/strong\u003e. Part of the Eco Series, it features a \u003cstrong\u003ededicated fixed saltwater salinity sensor\u003c\/strong\u003e calibrated for the higher salinity ranges found in marine environments — delivering fast, accurate readings without the complexity of a full benchtop instrument. Lightweight at just 6 oz, the 5052 slips into any pocket or aquarium toolkit for instant, on-the-spot salinity verification.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the Apera 5052?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSaltwater-Specific Sensor\u003c\/strong\u003e — dedicated fixed probe calibrated for marine salinity ranges; more accurate for saltwater than general-purpose salinity testers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Compact \u0026amp; Lightweight\u003c\/strong\u003e — 6 oz; fits in any pocket, aquarium kit, or field bag 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 reef keepers, marine hobbyists, and field technicians\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-Effective\u003c\/strong\u003e — professional-grade accuracy at an economical price; no refractometer or expensive 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\u003eSaltwater and reef aquariums: routine salinity and specific gravity monitoring\u003c\/li\u003e\n\u003cli\u003eMarine environmental field testing: coastal and estuarine water quality\u003c\/li\u003e\n\u003cli\u003eAquaculture: seawater salinity verification for marine species\u003c\/li\u003e\n\u003cli\u003eResearch and education: marine science field sampling\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\u003e5051\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSalinity\u003c\/td\u003e\n\u003ctd\u003eGeneral salinity monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong style=\"color:#0088cc;\"\u003e5052\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color:#0088cc;\"\u003eSaltwater Salinity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color:#0088cc;\"\u003eSaltwater aquariums \u0026amp; marine testing\u003c\/strong\u003e\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\u003eSaltwater Salinity\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 saltwater 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\u003e6 oz (approx. 0.375 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":44162467790935,"sku":"5052","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1555\/0581\/files\/5053_a8d5d19c-7fa4-4cb9-ba96-627a7683e4cf.avif?v=1786654679","url":"https:\/\/getultimatenow.com\/products\/apera-instruments-5052-saltwater-salinity-pen-tester","provider":"Get Ultimate Now ","version":"1.0","type":"link"}