--- product_id: 167489394 title: "RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function" brand: "rz mask" price: "$12.55" currency: USD in_stock: false url: https://www.desertcart.us/products/167489394-rz-aquariums-salinity-refractometer-for-seawater-marine-fish-keeping-dual store_origin: US region: United States of America --- # Dual scale precision (0-100ppt & 1.000-1.070 SG) Automatic Temperature Compensation (ATC) Durable aluminum & ABS rubber body RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function **Brand:** rz mask **Price:** $12.55 **Availability:** ❌ Out of Stock ## Summary > 🌊 Master your marine world with precision and style! ## Quick Answers - **What is this?** RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function by rz mask - **How much does it cost?** $12.55 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/167489394-rz-aquariums-salinity-refractometer-for-seawater-marine-fish-keeping-dual) ## Best For - rz mask enthusiasts ## Why This Product - Trusted rz mask brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Upgrade Your Aquarium Game:** Say goodbye to outdated hydrometers; get fast, clear readings through the optic eyepiece and stay ahead in marine care. - • **Effortless Calibration & Use:** Includes mini screwdriver and dropper for quick calibration and sample handling—accuracy made simple. - • **Precision at Your Fingertips:** Dual-scale measurement for specific gravity and salinity ensures pinpoint accuracy for marine environments. - • **Smart Temperature Adaptation:** ATC function automatically adjusts readings, eliminating guesswork and delivering reliable data every time. - • **Built to Last, Designed to Perform:** Robust aluminum frame with rubber grip and protective case for rugged, everyday use in any setting. ## Overview The RZ Aquariums Salinity Refractometer is a professional-grade tool designed for marine fish-keeping and saltwater monitoring. Featuring dual scales for specific gravity (1.000-1.070) and salinity (0-100ppt), it incorporates automatic temperature compensation for accurate readings regardless of environment. Built with a durable aluminum body and rubber grip, it comes complete with a protective case, calibration screwdriver, and dropper, making it an essential, easy-to-use device for aquarium enthusiasts and marine professionals alike. ## Description This refractometer is design according to the principle that different concentrations liquid have different refractive index with quick and accurate characteristics. ## Features - Measures on 2 Scales: Aquariums refractometer features Specific Gravity (D 20/20) 1.000-1.070sg and parts per thousand 0-100PPT (1‰=1ppt=1000ppm) - Seawater refractometer measures saltwater or salinity of water, ideal for aquarium, marine monitoring, fish-keeping,salty pools&spas and etc. - ATC Function: salty water refractometer with automatic temperature compensation, allow you obtain accurate readings easier and faster - Salinity Refractometer is made of aluminum body and ABS rubber light and very sturdy, comes with a hard plastic case, a mini screwdriver, a dropper - Easy to Use: put 2-3 drops on the saltwater’s prism, towards light then to get the accurate readings through the optic eyepiece, ideal for replacement the poor quality and difficult to read hydrometer refractometer ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07ZHZY2J1 | | ASIN | B07ZHZY2J1 | | Additional Features | Lightweight, Portable | | Age Range Description | Adult pets | | Best Sellers Rank | #253,904 in Pet Supplies ( See Top 100 in Pet Supplies ) #47 in Aquarium Hydrometers #563 in Dog Toothbrushes | | Brand Name | RZ Mask | | Breed Recommendation | Small, Medium Breeds | | Color | black and silver | | Customer Reviews | 4.6 4.6 out of 5 stars (772) | | Date First Available | November 14, 2019 | | Dog Breed Size | Medium | | Indoor Outdoor Usage | Indoor | | Item Dimensions L x W x H | 3.97"L x 5.24"W x 1.07"H | | Item Shape | Rectangular | | Manufacturer | RZ | | Manufacturer | RZ | | Material Type | Aluminum, Plastic, Rubber | | Pattern | saltwater tester | | Pet Toy Type | Chew Toy | | Product Dimensions | 3.97 x 5.24 x 1.07 inches; 9.17 ounces | | Product Style | Utilitarian | | Recommended Uses For Product | water | | Scent Name | Unscented | | Subject Character | Fish | | Target Species | Fish | | Theme | Marine Life | | UPC | 799418089683 | | Unit Count | 1.00 Count | | Water Resistance Level | Not Water Resistant | ## Images ![RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function - Image 1](https://m.media-amazon.com/images/I/61+iqLr-knL.jpg) ![RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function - Image 2](https://m.media-amazon.com/images/I/61IGU+0Az-L.jpg) ![RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function - Image 3](https://m.media-amazon.com/images/I/612NVJK8JWL.jpg) ![RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function - Image 4](https://m.media-amazon.com/images/I/71f71h1fohL.jpg) ![RZ Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function - Image 5](https://m.media-amazon.com/images/I/71XN0i-cYwL.jpg) --- ## 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.us/products/167489394-rz-aquariums-salinity-refractometer-for-seawater-marine-fish-keeping-dual](https://www.desertcart.us/products/167489394-rz-aquariums-salinity-refractometer-for-seawater-marine-fish-keeping-dual) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-08*