Searching for a Non-Electric thermometer to measure motors temperature

Dear Friends;

We are searching for "Non Electric Thermometer" type equipment (10-100ºC) which we would install permanently with the body of a DC (or any) motor to measure its temperature. The thermometer available at local pharmacies are just to measure up to 42C. If anyone knows about such equipment and its availability, please inform.

Why not use one based on a thermopile sensor?

Dear Asad,

I could not understand what you are referring for. Can you please explain in detail? or direct me to any website?

http://en.wikipedia.org/wiki/Thermopile

http://en.wikipedia.org/wiki/Thermocouple

Go to a store that sells Laboratory equipment, and ask them to give you a Thermocouple.

Also why not use a regular thermometer??

All you have to do is place it there.