Then make that crystal clear to her, and I mean crystal, that you are happily married and not looking for a side chick.
As in, you mention something you and your family did over the weekend when Monday rolls around. "Susie (or whatever your lovely wife's name is) and the kids and I had the best time at the water park on Saturday."
And you wear your wedding ring if you own one, every single day, all the time, unless you absolutely must remove it for some sort of clean room or finesse work. Given the lab coats, if you are, say, building microchips, you probably have to keep something out of the room where you do your work. But that shouldn't stop you from wearing it the rest of the time.
Case in point - last weekend (I'm a female-type person), the deli guy at the grocery was hitting on me. To give you some perspective, I am in my mid-50s. So all I wanted was my damned potato salad so I waited. And, as I did, I pulled my hair back from my face. With my left hand. You know, the one wearing the wedding ring. I got called "Ma'am" and I got my potato salad and got on line - where my husband was, BTW. Easy peasy.
Lather, rinse, and repeat as often as necessary.
Oh, and don't get drunk with your work colleagues, even if you're off the clock. That's a fine recipe for saying or doing something that will really bite you in the ass later.