Why are some thermometers are available in both spirit and mercury
i.e. ERTCO 613-3S spirit filled -20 to 150C 1C div
ERTCO 613-3 mercury filled -20 to 150C 1C div
They are both supposedly rated for same accuracy of +/- 1 div up to 100C
and 1.5div from 100 and up.
They're both within NIST tolerance.
-20 to 110~150 ish is your average high school chemistry thermometer.
Why is there a mercury version still available if they both provide same
accuracy and repeatability?
Besid the obvious spill containment, red spirit is a lot easier to read.
Who'd want a hard to read, clean up nightmare mercury thermometer over
the easy to read red spirit type?