How Well Does PIR Pet Immunity Work?

I don't have much experience with residential applications, and my boss wants assurances that if he puts a PIR with pet immunity in his house, his 2 small cats will not cause false alarms. The application is within the spec (immunity to 30 lbs) of the product I am looking at (Bosch), but I am hoping someone has the experience to say that pet immunity typically works as advertised, or that...

* ****** ********* **** **** ** ****** *** *******.

***** ***!

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*** ******** ********* *****, ** ***** ** ** ********** ** does. * ***** ***** **** *** ***** ** *** ** pound *********, ** **** *********** ***** ****.

***** **** '*** ********' *******, *** ****** ****** *****'* ****** all *** *** ** *** ******* ** *** *****, ** animals ***** ** *** ****** ****'* ********.

** ***** *****, *** ****** ** ******** **** ** **** if *** **** ** ******** ***** ******** ** * ******* size. **** ** ***** *** ****** ****** ***** **. ***** 30 ******, *** **** *** **** ** ** ****** ** rather *****, ** **** ** *** ****** ******* ********, ** just ******* **.

* **** * *** (******** ~** ***.) *** *** ****** PIRs ** ** *****. ****'** *** *****, ****'** ******* *-**** models, *** ****'** **** ****'* ** ** ******.

* ***'* *** *'** ********** ******, *** ****'** **********. * *** **** *** *** since * ********* **** **** ********/********.

*'* **** *** *** **** *** *** ******* ***** *** the ***** ********, ***** ******* ********* *** ****** ** * cat ********** ***.

**** ******* ** **** ****. *** ***** ** **** **** is ** *** **** ********* ***** *** ******* *** **** up ** ** ** *** ***** *** ****** **** *****. This **** *** ****** ***** *** "*** ****" *** *** trigger *** ****** ********. **** **** ** **** **** *** install *** ****** *** *** ****** ** ****.

** **** ***** ******* ***** ********** *** ***** ** ******** on *** *****? ;)