Heavy Duty Salinity Refractometer for Aquarium Ocean Salt Water, Hydrometer, Calibration Knob RBTI much easier

much easier

---> (1)Standard DOT 4: Boiling Point - 2125'C to 275'F & 1-6% Water

Ensure temperature is within 10°C – 35°C

Automatic temperature compensation is specific for human urine and insures that fluids read between 10 and 45 °C (+50 to 113 °F) are measured accurately

not plastic like the GIA ones

Heavy Duty Salinity Refractometer for Aquarium Ocean Salt Water, Hydrometer, Calibration Knob RBTI much easierItem Description: RHSN 10ATC Portable Heavy Duty Salinity Refractometer Product Specs * Ranges: 0 100 ppt of Salinity and 1. 000 to 1. 070 Specific Gravity * Accuracy: + 1 ppt 0. 001 Specific Gravity * Divisions: 1 ppt 0. 001 Specific Gravity * Automatic Temperature Compensation (ATC) * EXTRA Sturdy design made of durable Aluminum, not "carbon" plastic and a CALIBRATION KNOB, 3 Year Warranty IMPORTANT! HIGH QUALITY! EACH UNIT COMES WITH A 3 YEAR