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The MA-422F ASTM 3F General Use Mercury Thermometer is 16.3in (415mm) long, with a total measurement range of 20°—760°F and graduations of 2.0°F. Immersion is 3in (76mm).
MA-422FT ASTM 3F General Use Mercury Thermometer is the same, but comes with a NIST Traceable Certificate of Calibration.
Please check your state and local ordinances controlling mercury instruments before ordering. Regulations are constantly changing and Gilson may not be permitted to ship these devices to you.
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