MariSteiger Lumi B20

Equipment notes

The Lumi B20 is a compact electric grinder in the Lumi line from MariSteiger, distributed mainly through the Korean market. The Lumi series emphasizes portability and rechargeable operation, and the B20 sits toward the most compact end of it. It uses a conical ceramic burr. Ceramic is heat-resistant and wear-tolerant, so it runs cool, and the conical shape passes somewhat more fines, favoring a cup with body. Ceramic edges are duller than steel, however, and wear gradually over time. Grind size is set with stepped adjustment. It suits travel and camping where portability matters, and home users looking for a compact rechargeable electric grinder.