Choosing Thermometers for Antarctic Conditions

For measuring temperatures in Antarctica's extreme cold, both mercury and alcohol thermometers are suitable, though with different operational ranges:

• Mercury thermometers function down to approximately -38°C (-36°F) — mercury's freezing point
• Alcohol thermometers (typically ethanol-based) can measure down to -114°C (-173°F), well below Antarctica's recorded extremes

Practical Considerations

While both types can handle typical Antarctic temperatures (which rarely exceed -60°C at the coldest interior stations), alcohol thermometers are generally preferred for field work due to their wider range and safety—mercury poses environmental hazards if broken.

Modern research stations primarily use platinum resistance thermometers (PRTs) and thermocouples for precise, automated data logging, but traditional liquid-in-glass thermometers remain valuable backup instruments.