Maximum Thermometer

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Show/Hide Sub-topics (Thermal Physics | O Level)
  1. Thermometry
  2. Thermometric properties
  3. Defining a temperature scale
  4. Laboratory thermometer
  5. Clinical Thermometer
  6. Maximum Thermometer
  7. Minimum Thermometer
  8. Three States Of Matter
  9. Brownian Motion 
  10. Pressure In Gases
  11. Internal Energy
  12. Thermal Energy
  13. Heat Capacity
  14. Specific Heat Capacity
  15. Change Of State
  16. Melting and solidification
  17. Boiling and condensation
  18. Evaporation
  19. Differences between boiling and evaporation
  20. Specific latent heat
  21. Temperature
  22. Thermal Equilibrium 
  23. Conduction 
  24. Convection 
  25. Radiation

Maximum and minimum thermometer
Maximum and minimum thermometer

It measures the maximum temperature in a day. Mercury is used as thermometric liquid.

  • There is a steel index inserted inside the capillary tube. Spring connected to the index prevents it from moving back to the bulb.
  • With increasing temperature, mercury expands and pushes the steel index along the capillary tube. The index will be left at the furthest position to which mercury has expanded. Lowest point of the index (convex meniscus of mercury) reads the highest temperature within the day.
  • The index can be reset using a magnet.

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7 thoughts on “Maximum Thermometer”

    • The index been a magnetic material is been drawn down when it is placed in the magnetic field of the magnet. Moving the magnet also moves the index.

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