Salinity Refractometer 0~28% Scale Range, Measuring Sodium Chloride Content in Brine, Seawater and Industry. Salinometer for Food with Automatic Temperature Compensation (ATC)

Thermco GW2511X Plain Form Salt Brine Hydrometer, Sodium Chloride % by Weight, 0 to 26.5% Range, 0.5° Division

Vintage Shop PW-COIA-QACH Hydrometer 12" Test Jar with Removable Base

Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater, Pool, Aquarium, Fish Tank.Dual Scale: Specific Gravity & Salt Percent

H-B DURAC B61809-0000 Salt Brine Hydrometer; 0/100 Percent by Saturation

API Saltwater Master Test Kit 550-Test Saltwater Aquarium Water Test Kit

0-90% Brix Meter Refractometer,V-Resourcing Portable Hand Held Sugar Content Measurement for Sugar, Food, Fruit, Beverages Honey

Milwaukee MW600 LED Economy Portable Dissolved Oxygen Meter with 2 Point Manual Calibration, 0.0 - 19.0 mg/L, 0.1 mg/L Resolution, +/-1.5 percent Accuracy, 100 Percent Saturation Range

Dr.meter PH100-V 0.01 Resolution High Accuracy Pocket Size pH Meter with ATC, 0-14pH Measurement Range

Professional Automatic Temperature Compensation Salinity Refractometer for Aquariums, Marine Monitoring, Saltwater Testing.Dual Sacle: 0-100ppt & 1.000-1.070 Specific Gravity

Aqua Craft Standard Seawater 35 ppt Refractometer Calibration Solution - 60 ml