--- product_id: 348901478 title: "Salinity Refractometer for Aquarium Marine Seawater Fishkeeping Saltwater Refractometer Dual Scale Specific Gravity Salinity Tester Hydrometer 0-100 PPT& 1.000-1.070 Optics Salinity Meter with ATC" brand: "hallocool" price: "€ 36.64" currency: EUR in_stock: true reviews_count: 8 category: "Hallocool" url: https://www.desertcart.hr/products/348901478-salinity-refractometer-for-aquarium-marine-seawater-fishkeeping-saltwater-refractometer-dual store_origin: HR region: Croatia --- # Dual scale: 0-100 PPT & 1.000-1.070 SG ATC for precise temp-compensated readings Durable aluminum & ABS rubber build Salinity Refractometer for Aquarium Marine Seawater Fishkeeping Saltwater Refractometer Dual Scale Specific Gravity Salinity Tester Hydrometer 0-100 PPT& 1.000-1.070 Optics Salinity Meter with ATC **Brand:** hallocool **Price:** € 36.64 **Availability:** ✅ In Stock ## Summary > 🌊 Measure like a pro, keep your marine world flawless! ## Quick Answers - **What is this?** Salinity Refractometer for Aquarium Marine Seawater Fishkeeping Saltwater Refractometer Dual Scale Specific Gravity Salinity Tester Hydrometer 0-100 PPT& 1.000-1.070 Optics Salinity Meter with ATC by hallocool - **How much does it cost?** € 36.64 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/348901478-salinity-refractometer-for-aquarium-marine-seawater-fishkeeping-saltwater-refractometer-dual) ## Best For - hallocool enthusiasts ## Why This Product - Trusted hallocool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rugged & Reliable:** Crafted from anti-rust aluminum and abrasion-resistant ABS rubber for long-lasting, worry-free use. - • **Dual-Scale Precision:** Get instant salinity & specific gravity readings in one go—no guesswork, just accuracy. - • **User-Friendly Design:** Simple 2-3 drop sample test with clear optics—calibrate once, measure confidently every time. - • **Versatile Marine Use:** Perfect for aquariums, marine monitoring, fishkeeping, and saltwater pools—your all-in-one salinity sidekick. - • **Automatic Temperature Compensation:** ATC tech ensures your results stay rock-solid regardless of water temp fluctuations. ## Overview This Salinity Refractometer offers dual-scale measurement (0-100 PPT & 1.000-1.070 specific gravity) with automatic temperature compensation for precise, reliable salinity readings. Built with durable aluminum and ABS rubber, it’s designed for aquarium enthusiasts and marine professionals seeking quick, accurate water quality checks in a portable, easy-to-use device. ## Description From the manufacturer Salinity Refractometer for Aquarium Seawater Marine Fishkeeping Dual Scale 0-100 PPT& 1.000-1.070 with ATC The salinity refractometer is made of aluminum and ABS rubber, anti-rust, non-staining and resistant abrasion, sturdy for long time use. Portable refractometer with plastic case easy to carry Seawater refractometers with premium optics and smooth focusing. The internal optical lens with high refractive index ensure the precision optical system so we can get the accuracy measured results and view the scale clearly. The refractometer series are baseed on the princple that the refractive indices of liquids change when the concetration change, which allow you easy to do test without batteries requiered, more accuracy then traditional hydromometer and more affordable than a digital salinity meter Product Features ATC Function Saltwater refractometer with ATC function, can automatic compensate for changes in ambient temperature, and minimize the impact of temperature on accuracy. Clearly Eyepiece This salinity meter features clearly lens and smooth adjustable focus, easy to read the clearly readings by manipulating the eyepiece Adjustable Visual This salinity features clearly lens and smooth focusing, which allow you see the clearly scales easily. Dual Scale Aquarium Refractometer Average Salinity of Sea Water Research data shows that the average salinity of sea water is about 35‰ and most sea water's salnitiy is bettwen 30‰~35‰. However, each seas has different salinity, such as the salinity of Dead Sea is high as 227‰~281‰, the salinity of the Red Sea reaches as high as 42.8‰ in some areas, but the Baltic Sea is as low as 10‰ This salinity refractometer is great for measuring sea water or checking salinity solution concentration. The Scale Range Specific Gravity and PPT With this salt refractometer, you can get the accurat results in two different units at the same time at just one test. Saline Refractometer provides readings of 0-100‰ and corresponding specific gravity 1.000 to 1.070 . These are the most common units to show salinity of water. 1‰=1 PPT=1000PPM, PPT means"parts per thousand", PPM means"parts per million" The minimum scale reading resolution is 1 ‰, allows to measure low concentrated salt solutions. Accuracy: ±0.2%, automatic temperature compensation (ATC): 0-10°C Reference Temperature: 20°C Wide Application For Aquariums Water Monitoring Perfect for aquariums or marine fishkeeping amateurs, cause they can make the salinity of water similar to the sea water and easy to monitoring daily. For Marine Monitoring Most sea water's salinity is about 30‰~35‰. So this Brine refractometer is ideal for simple marine monitoring, marine aquaculture and research. For Fish Tank saltwater Measuring Use this salinity refractometer to test the salt water of your fish tank at home. It also can be used to measure concentration of brine solution at food preparation. For Lab Education or Indurstry Purposes Ideal for lab use, lab educational tool in shoocl and industry use for testing salinity solution in the range of 0~100‰. Easy to Use Calibration: Place 2-3 drops of distilled water or fresh water on the prism to check the scale ( when you see it at "0" level, it means refractometer already calibarated. If not, please use the screwdriver to calibarate it to "0") Measuring Place a few drops of solutions you want to test on the prism Look into the eyepiece, and you will get the accurate reading quickly. No batteries required User manual is easy to read The manual has more details about how to use the instrument exactly, and also very easy to use for new users. ## Features - MEASURES ON 2 SCALES - Aquarium Refractometer features specific gravity (D20/20) 1.000-1.070 and parts per thousand 0~100‰ , allow to get two results in different units by one test - WIDELY USE - Salinity Refractometer measures saltwater, salinity of water or seawater, ideal for aquariums, marine monitoring, fish-keeping, and saltwater pools - ATC FUNCTION - Saltwater refractometer with automatic temperature compensation (ATC) function, allow you to obtain the accurate result faster and easier - EASY TO USE - Put 2-3 drops of sample on the refracotmter’s prism, towards light, read the accurate readings through the optics eyepiece directly - DURABLE MATERIAL: The optic salinity tester is made of aluminum and ABS rubber, anti-rust, non-staining and resistant abrasion. Portable Refractometer comes with plastic case, mini screwdriver,a dropper and a cleaning cloth ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08TJ28XC1 | | Batteries Included | No | | Customer Reviews | 4.5 4.5 out of 5 stars (530) | | Date First Available | 26 March 2021 | | Item Weight | 250 g | | Number of Items | 1 | | Package Dimensions | 22.7 x 12.5 x 6.5 cm; 250 g | | Quantity | 1 | | Size | 1 Count (Pack of 1) | | batteries required | No | ## Images ![Salinity Refractometer for Aquarium Marine Seawater Fishkeeping Saltwater Refractometer Dual Scale Specific Gravity Salinity Tester Hydrometer 0-100 PPT& 1.000-1.070 Optics Salinity Meter with ATC - Image 1](https://m.media-amazon.com/images/I/61sdTgf7zcL.jpg) ## Questions & Answers **Q: can I use this to test road brine concentration? (calcium chloride)** A: i don’t see why not…any saltwater could be tested for its saltiness. **Q: where will this be shipped from?** A: Hello. These items will be shipped from US Amazon warehouse. **Q: Is this product accurate enough to test well water for salinity?** A: Yes, this salinity refractometer can measure salt water or salinity of water, ideal for aquariums and marine monitoring. It's accurate. **Q: when calibrating to 0, what counts as distilled or fresh water?** A: After doing some research, apparently you don’t want to calibrate to 0. The reason for the 35ppt calibration fluid is it will lose accuracy the further away you get away from the calibration level. So you want to calibrate as close to the level that you plant to use it at as possible. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by T***Q on 16 May 2023* ### ⭐⭐⭐⭐ Review *by A***D on 25 April 2026* ### ⭐ Review *by A***I on 6 August 2025* ## Frequently Bought Together - Salinity Refractometer for Aquarium Seawater Marine Fishkeeping Salinity Tester 0-100PPT & 1.000-1.070 Salinity Hydrometer Slatwater Refractometer with Automatic Temperature Compensation (ATC) - API SALTWATER MASTER TEST KIT 550-Test Saltwater Aquarium Water Test Kit - Instant Ocean Sea Salt 50 Gallons, For Marine Aquariums, Fast Dissolving --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/348901478-salinity-refractometer-for-aquarium-marine-seawater-fishkeeping-saltwater-refractometer-dual](https://www.desertcart.hr/products/348901478-salinity-refractometer-for-aquarium-marine-seawater-fishkeeping-saltwater-refractometer-dual) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-22*