Help . how does a clinical thermometre differs from a laboratory thermoeter?

  • Thread starter Dark Angel
  • Start date
  • #1
Help..plzz. how does a clinical thermometre differs from a laboratory thermoeter?

hey. anyone could help me in listing ways in which clinical thermometer differs from laboratory thermometer? with explaination for each difference?

thanx everyone for ur help.
 

Answers and Replies

  • #2
Integral
Staff Emeritus
Science Advisor
Gold Member
7,200
56
How about you start by giving us some of your thoughts on the question?
 
  • #3
Tau
14
0
1. A clinical thermometer has a narrow constriction in the tube just above the bulb. The expanding mercury pushes its way past the constriction when the thermometer is placed in the mouth.
When the thermometer is taken out of the mouth the mecury does not immediately fall back to the bulb. The mecury is trapped at the temperature of the body it was placed in. This allows for the temperature to be read after it has been taken out of the mouth. The only way to return all the mecury to the bulb is to flick it back and forth.
A normal thermometer (a lab thermometer) does not have this constriction

2. A clinical thermometer has a much shorter range than a lab thermometer. A clinical has a range of 35C to 42C (about the range for body temp.) but a lab has a range to about 100C or 120C

3. The cross sectional shape of the tube is a pear shape. It acts as a magnifying glass so that it is easier to see the fine thread of mercury in the fine tube. A lab thermometer doesnt have this pear shape (not that I know of).

Jeremy
 
Last edited:

Related Threads on Help . how does a clinical thermometre differs from a laboratory thermoeter?

Replies
1
Views
747
  • Last Post
Replies
4
Views
18K
  • Last Post
Replies
14
Views
2K
Replies
7
Views
979
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
11
Views
3K
Replies
4
Views
1K
Replies
6
Views
4K
Replies
0
Views
5K
Replies
6
Views
2K
Top