Of clear polycarbonate, for direct reading of degree (percentage) of saturation of salt at 60°F
Range from 0 to 100° in 1° divisions; 100° indicates a saturated solution of sodium chloride in water, i.e.
26.395% salt
Approximate total length 300 mm (12 in.), approximate length of graduated scale 150 mm (6 in.)
Tolerance ±1 scale division
Requires a cylinder 330 x 35 mm and 300 mL of liquid.