Buying Guide
Cafés measuring coffee concentration (TDS) and sugar (Brix) exclusively select YW-681-P.
Coffee-Specific Features
Dual display: Coffee TDS % + Brix + real-time temperature simultaneously.
0.01% ultra-fine resolution for precise espresso strength control.
IP66 full waterproof housing safe for daily coffee liquid rinsing.
Small 0.5mL sample tank saves expensive espresso test volumes.
Distinction from YW-681: YW-681 only measures fruit Brix without coffee TDS readout.
Fruit processing plants need YW-681 multi-range Brix models (0–32 /0–55% options).
Factory Production Standards
±0.2% high precision for batch sugar content quality control.
Refractive Index (RI) extra readout for advanced lab beverage analysis.
10–40℃ full auto temperature compensation for cold/hot fruit batches.
USB recharge lithium battery for non-stop shift testing.
Food laboratories frequent sample washing require IP66 rated YW-681/681-P.
Lab Waterproof Rules
Rinse prism tank with running cold water after each fruit/coffee sample, never fully submerge main unit.
Hard scratch-resistant optical prism for repeated pipette sample dropping.
Long standby built-in battery reduces frequent charging during lab workdays.
Zero calibration with pure water only, no costly calibration fluid required.
Home baristas measuring espresso extraction strength choose compact YW-681-P.
Home User Perks
Simple three-key layout (Light / Power / TEST ZERO) no complex menus.
Protective cover blocks kitchen window sunlight distorting readings.
Auto 10-minute power off after idle to preserve battery between weekly coffee tests.
Small pocket design for home coffee station storage.
Clear guide to pick based on beverage testing type
YW-681 (Fruit/Juice/Honey)
Output: Brix + Refractive Index + Temp
Range options: 0–32% / 0–55% Brix
Best: Fruit farms, jam makers, beverage factories
YW-681-P (Coffee Only)
Output: Coffee TDS + Brix + Temp
Range: 0–25% Brix / 0–22% TDS
Best: Cafés, home baristas, coffee roasters
