Temp sensor placement

I've ordered a few DS18B20 (dallas temp sensor) in a TO92 package. I want to measure the temperature of a DC motor, therefore a contact application.
I was reading the datasheet and it says that the air temperature around the package affects the temperature reading, which in this application is undesireable. I'm thinking about a few alternatives, such as creating a tight casing around the sensor using epoxy.
Can anybody here share experiences on mounting temp sensors on motors?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.