# What is an RTD & Pt100

**URL:** <https://forumautomation.com/t/what-is-an-rtd-pt100/89>\
**Category:** Temperature Measurement\
**Created:** [October 2, 2014, 6:28pm UTC](https://forumautomation.com/t/what-is-an-rtd-pt100/89 "2014-10-02T18:28:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![instrumen](https://forumautomation.com/letter_avatar_proxy/v4/letter/i/65b543/32.png) [@instrumen](https://forumautomation.com/u/instrumen)\
**Post date:** [October 2, 2014, 6:28pm UTC](https://forumautomation.com/t/what-is-an-rtd-pt100/89/1 "2014-10-02T18:28:04Z")

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RTD – Resistance Temperature Detector

RTD is a positive temperature coefficient resistance which provides a linear rise in its resistance verses the rise in temperature Pt 100 platinum resistance 100 Ohms

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**Author:** ![jaykishan\_bosamiya](https://forumautomation.com/user_avatar/forumautomation.com/jaykishan_bosamiya/32/4269_2.png) [@jaykishan\_bosamiya](https://forumautomation.com/u/jaykishan_bosamiya)\
**Post date:** [September 6, 2019, 12:25pm UTC](https://forumautomation.com/t/what-is-an-rtd-pt100/89/2 "2019-09-06T12:25:34Z")

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PT100 stands for plattinum whose resistance is 100 ohm at 0 deg Celsius.