ERMA Salinity Refractometer for Aquariums, Marine Monitoring, Saltwater Testing Dual Scale 0-100‰ & 1.000-1.070 Specific Gravity Saltwater Refractometer with ATC

About this item

• ✅Auto Temperature Compensation (ATC), increase accuracy& eliminates concerns on temperature
• ✅Easy to calibrate and use
• ✅Cushioned with soft & comfortable non-slip rubberized grip, insulate test solution from body heat
• ✅Adjustable focus and clearly defined scale, with large easy-to-read measurements
• ✅Approved by strict quality & safety standards