G1/2 water flow sensor questions

I’m looking for a flow meter for a kegbot project and am interested in the “G1/2 Water Flow sensor” (seeedstudio.com/depot/water- … p-635.html).

What kinds of materials it is made out of? Is it relatively safe to drink water/beer/any other normally “safe” fluid if the fluid sits in or passes through this device?



It’s could be used for drinking water. And you can get the datasheet for the material here: