flowmeter/water totalizer -- sanitary or non?

[barleyfreak]

I'm looking for a water totalizer to measure volume into the tun from our filtered on-demand hot water heaters. It has to handle high temps, but the question is do I need a sanitary one?

I've found a couple relatively cheap options,

http://www.globalspec.com/pdf/viewpdf?partId={68644B6E-AF7C-417E-82D0-1F69070DA5F9}&comp=1863&r=1&from=detail&vid=93224

takes 194 degrees, and

https://store-iaojjj3.mybigcommerce.com/product_downloads/literature/Datasheets/WM2-H_datasheet.pdf

also takes up to 194 degrees, and

http://www.omega.com/pptst/FTB4000.html

which handles up to 200 degrees.

Is there anything in the composition of these units that should deter me? Is sanitary necessary at this point?

I appreciate any advice.
Thanks,
Dave

[Ted Briggs]

My Suggestion

http://www.gwkent.com/econo-turbine-flow-meter.html

[barleyfreak]

That's a sanitary one around $900. The non-sanitary is less than $200. Again it is only used during mash in to measure volume.