The 084Z3031 is indeed a PT1000 so it is not the one you would want. There are several PT100 versions in this series, however they vary slightly from the 084Z3031, so you will need to know the specs that you are looking for, or that may work in your application.
The 084Z3031 is 1.97" insertion length and has a connection size of 1/2"-14 NPT

Here are the PT100 versions that most closely resemble the specs of the 084Z3031:
084Z8011 1.97" insertion length and has a connection size of 1/2"
084Z8019 3.15" insertion length and has a connection size of 1/2"-14 NPT

So if you know the insertion length and connection size we can narrow it down if neither of these will work for you.