Check the listing for details. Brix Refractometer with ATC - Tiaoyeer Digital Handheld Refractometer. Condition: Used. Listed at 35.99 USD. Gently used a couple time to test saltwater aquarium water. Works great. This handheld refractometer is a must-have for professionals in need of accurate and quick refractometry measurements. The Tiaoyeer Digital Handheld Refractometer is designed for use in various industries, including healthcare, lab, and dental settings. Its compact size and lightweight design make it easy to carry around, while its advanced features ensure accurate and reliable results every time. The refractometer type is a handheld refractometer, making it easy to use and operate. The device is made by Tiaoyeer, a trusted brand known for its high-quality products. It is ideal for use in lab refractometers and is perfect for professionals looking for a reliable and accurate tool for their everyday work.