Mercury-free thermometers conform to ASTM specifications
Individually serialized for easy identification
Blue organic fill is easy to see against backdrop of white glass
These NIST-traceable thermometers fulfill requirements for performing ASTM methods without the worry of mercury contamination. Organic fill solution is safer to clean up in the event of breakage. The calibration report states corrections to one-tenth of the smallest division, providing an accurate offset for ensuring precise measurement records.