https://www.amazon.com/gp/product/B005QRWEBK/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I like this one (use it in my kitchen). Super easy to clean, reliable, compact, and pretty cheap. I would buy one for lab work if I needed to. It is only accurate to 1 g measurements, though. Not sure if that will work for new/used cigarettes.