Observation Techniques
[Index]
Main Index Home Page Stock Weather Photos Australian Severe Weather Forum Storm News and Storm Chasing Reports Tropical Cyclones / Hurricanes / Typhoons Weather Data and Links Wild Fires / Bushfires Weather Observation Techniques Weather Picture Catalogue Tornado Pictures and Reports Stock Video Footage and DVDs for sale
Minimum and maximum thermometer
[Back to Observing temperature of the air]

This type of minimum and maximum thermometer uses a U-shaped tube. Both sides should measure the same temperature. However, the scale is inverted. There are also needles inside the tube. As the temperature drops, the mercury pushes the left hand side needle upwards. This then measues the minimum temperature because a magnet at the back holds the needle in position. As the temperature increases to a maximum, the right hand side needle is pushed upwards to record a maximum when it stops. To reset it, the red centre button is pushed and the needles drop.

thermometer


Document: thermom.htm
Updated: 20th March 2008

[Australian Severe Weather index] [Copyright Notice] [Email Contacts] [Search This Site]