The Acaia Pearl Model S is a professional-grade smart scale that brings consistency and insight to your coffee brewing. It provides all the help you will need to make that perfect cup of coffee with its essential brewing modes, real-time flow-rate display, and the all-new built-in Acaia interactive coffee brewing guide. This is the larger of the two models. Designed for espresso machine drip trays, the Acaia Lunar is aesthetically functional for your weighing needs. The espresso scale is built with anodized aluminum. Its electronic parts inside and the LED display with a water-resistant spray to prevent water damage. This is a much smaller scale for espresso cups. With an ultra-fast response time and high accuracy, you'll be able to track consistency across all of your espresso shots.