A glass instrument that measures the specific gravity of liquids, an important aspect of proper mixing of glaze & slip. Wet and gently lower into the liquid.
hydrometer
Hydrometer - 6" long, 40 to 60 baume
hydrometer-6
$21.44
Hydrometer - 11.5" long, 0 to 70 baume
hydrometer-115
$33.28