You may want to view these Datasheets for Durham Geo’s ASTM Thermometers.
ASTM Thermometers are manufactured to meet ASTM Standard E 1 in every detail. The glass tubing used conforms to exacting specifications for composition and physical properties. Graduations, numbers and letters are deeply etched into the glass and filled with improved black or red pigments which are unaffected by ordinary solvents.
|G-18766||20 to 70 °C||1/5 °C||12 in (30.5 cm)||Stormer Viscosity||49 C|