Review on 🔬 Ade Advanced Optics Refractometer (1000-1120) by Adam Taylor

This is a good instrument at best. As other reviewers have pointed out, you'll need to calibrate this item every time you use it (which is usually a chore). For example, if you choose to pre-cook, you need to calibrate it. You also need to recalibrate it to get the OG after cooking (yes, you need to recalibrate it twice if you test the OG both before and after cooking). Aside from the hassle of calibrating each time, this item seems relatively accurate (within 0.001) to my hydrometer readings.