The ASTM #57C Tag Closed Low Thermometer, -20 to 50C 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: 57C
Length: 11.8 (290), in (mm)
Immersion: 2.3 (57), in (mm)
Range: -20 to 50C
Division: 0.5C