The ASTM #21C Saybolt Viscosity Thermometer, 70 to 87C has a strict manufacturing tolerance. Accuracy is assured by inspection and testing of samples from each production run. The thermometer is supplied with a statement of compliance to E 1 and E 77 requirements. The ASTM Thermometer is yellow-backed glass with permanent graduations, mercury-filled and individually packed in a cardboard tube.
ASTM Number: 21C
Length: 10.8 (275), in (mm)
Immersion: Total
Range: 70 to 87C
Division: 0.1C