Question

Write principal merits of a Pt-resistance thermometer.

Answer 1

A platinum resistance thermometer (PRT) is a temperature sensor that determines temperature by measuring the electrical resistance of a platinum wire.

The electrical resistance of platinum increases linearly with temperature. This electrical resistance of a platinum wire is then measured by passing a current through it and by measuring the voltage across it.

The resistance of a platinum wire is calibrated to give a temperature reading.It has a wide range and is very accurate.  It is best for measuring small steady temperatures.

Hope this will help you.

Answer 2

The merits of a platinum resistance thermometer are:

1. It is very accurate. It is useful for precision measurements of the highest accuracy as well as for routine industrial work.

2. It is a versatile instrument for temperature measurement. It has a wide range from 200 degrees to 1000 degrees Celsius.

3. It is very suitable for small steady temperatures.