×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Thermocouple temperature range
2

Thermocouple temperature range

Thermocouple temperature range

(OP)
Our client wishes to use a Type E Thermocouple(0-800'C) to measure fan bearing temperature (0-150'C. Am I right in thinking that this would work but would not be the best thermocouple choice?

Thanks

RE: Thermocouple temperature range

J would be better because it has higher sensitivity and is more common too. Can't see fan bearings exceeding hundreds of degrees either. Better would be RTD or even thermistors unless key info is missing.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Thermocouple temperature range

Platinum RTD 100 is the common sensor used for bearing temperautre measurement on rotating machines generally. Thermocouples are less common for this application.

Type 'K' is arguably the most common type over this side of the water, but J and T are not exactly uncommon.

RE: Thermocouple temperature range

Type E has the highest sensitivity of typical commercial thermocouples, at ~68 microvolts/K (compared to type J at ~50 microV/K). Agree that types J and K are more common and probably more readily available. Type E is non-magnetic, but not sure if that matters on the OP's application. There are lots of pros/cons to weigh for any temperature measurement - cost, life expectancy, accuracy, ease of measurement are just a few.

RE: Thermocouple temperature range

Ack! I looked at the limit of error column thinking it was the sensitivity.. Thanks for the correction btrue.

Lc85, Your client is indeed grabbing for the sensitivity. But as we're saying RTDs are typically used for this.

Keith Cress
kcress - http://www.flaminsystems.com

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources