Chemical-Resistant Camera Choices?

We have an interesting situation where we need to deploy cameras in a harsh food processing environment where chlorine is often sprayed around (and sometimes at) the prospective camera location.

We'd like your opinion about the least expensive solution to this challenging placement.

We have found three acceptable (we think) choices, from least to most expensive:

1)...

*****-** ****** & ******-** **** *** -- ***** **** **** 4X *** **** *********); **** $*,***.

*) *** *** ****** ****** * **** ******** ****** ********* Steel ******* ******* -- ************* ** *** **** *********; **** $*,*** (*** ********* *** camera ****).

*) *** *** ****** ****** * **** ******** ****** ********* Steel **** -- ***** **** **** **/* *** **** ********* (pressurization ** ** ******); **** $*,*** (*** ********* *** ****** cost).

**** ********: ** *** ***** ************** ** ***** *** ***** hassle?

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********* **** ********* ******* ** *********** *** * ***** ** depth.

NEMA **:

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NEMA ** (*********** **** **** ** *** **********):

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