Master Your Brew with the Ultimate Digital Brix Refractometer
Achieve laboratory-grade extraction precision at home. Stop guessing and start measuring with the Jiuhua Optical 101.
CoffeeDens
£113.99 inc. VAT (£94.99 ex. VAT)
Dial in your espresso and filter coffee with laboratory-grade precision. The Optical 101 accurately measures both coffee TDS and Brix concentration in just 2 seconds.
Happy Customers
Avg Rating (142+ reviews)
Satisfaction Rate
Loved Across Britain
Free UK Delivery
Next-day dispatch from our UK warehouse
2-Year UK Warranty
Full manufacturer warranty with UK support
30-Day Free Returns
No questions asked, prepaid return label
0-50 Brix Range
Versatile measurement for espresso and filter
Trusted by UK Independent Cafes & Home Baristas
Barista Reviews
Compiled from marketplace feedback and product research signals.
An absolute game-changer for my home espresso setup. I used to guess why my light roasts were sour, but with this coffee extraction meter, I can see exactly where my TDS is sitting. The USB-C charging is a great modern touch.
Ordered on Tuesday, arrived Wednesday morning. The build quality is fantastic. I run a small independent cafe and this professional digital coffee refractometer performs just as well as units that cost three times the price.
As a data nerd, I love this device. The ±0.1% accuracy is spot on when tested against my laboratory refractometer. It's transformed how I dial in my V60s every morning. Highly recommend for any serious coffee enthusiast.
Brilliant bit of kit for the price. The 0-50 range is great as I also use it for brewing kombucha. My only minor gripe is the screen can be a bit hard to read if the sun is glaring directly through the kitchen window.
I was hesitant to buy a digital coffee refractometer online, but CoffeeDens delivered perfectly. It's so much more accessible than the VST or DiFluid alternatives, yet gives me the exact same extraction data for my daily flat whites.
Very solid brew strength refractometer. It takes a second to get used to the cooling process for hot espresso samples, but once you have your workflow down, the consistency is unmatched. Great UK support too.
How to Measure TDS
- Calibrate: Ensure the sensor is clean. Place a few drops of distilled water onto the optical sensor and press the 'Zero' button to calibrate the device.
- Prepare Sample: Brew your coffee and stir well. Use the provided pipette to extract a small sample. For hot espresso, allow the sample to cool in a separate cup for 30 seconds to reach room temperature for the most accurate reading.
- Measure: Place 0.2ml (approx. 2-3 drops) of the coffee sample onto the sensor, ensuring there are no air bubbles.
- Read: Close the ambient light cover and press 'Read'. The digital screen will display your TDS and Brix percentage in 2 seconds.
- Clean: Wipe the sensor clean with a damp microfibre cloth immediately after use. Do not submerge the entire unit in water.
At CoffeeDens, we believe that brewing exceptional specialty coffee is a delicate balance of art and science. For too long, UK baristas and home brewing enthusiasts have had to rely on guesswork or invest in prohibitively expensive legacy equipment just to measure their Total Dissolved Solids (TDS). We founded CoffeeDens to bridge that gap, bringing laboratory-grade precision directly to your kitchen or cafe countertop.
Based in the UK, we specialise in high-accuracy optical measurement tools designed specifically for the fast-paced workflows of modern coffee shops and the meticulous routines of home brewers. Our flagship Jiuhua Optical 101 offers an incredible 0-50 Brix measurement range, ensuring you can dial in everything from a delicate pour-over to a dense, syrupy ristretto with absolute confidence.
We are deeply passionate about specialty coffee culture. By providing affordable, reliable data, we empower you to diagnose extraction issues, map your roast profiles, and consistently recreate that perfect cup. With dedicated UK-based customer support, fast domestic shipping, and comprehensive local warranties, CoffeeDens is your trusted partner in the pursuit of the ultimate extraction.
Why UK Customers Love Us
Our products are designed and supported in the UK, ensuring superior quality and fast tracked delivery from our British warehouse. We offer free UK delivery on all orders, eco-friendly packaging to reduce carbon footprint, and warm, direct customer service. Every order is backed by a generous 30-day returns policy under the UK Consumer Rights Act 2015 — you are always protected.
Frequently Asked Questions
Extraction Science Blog
The Ultimate Guide to Digital Refractometer in the UK
The Ultimate Guide to the Digital Refractometer in the UK TL;DR: What is a digital refractometer? A digital refractometer is a highly accurate electronic…
Read more →
Digital Coffee Refractometer Explained: A UK Buyer's Guide
TL;DR: A digital coffee refractometer is an electronic precision instrument that measures the bending of light through a liquid to calculate your coffee's…
Read more →Optical 101 Refractometer Explained: A UK Buyer's Guide
TL;DR: The Optical 101 refractometer is a precise, battery-free analogue instrument used to measure the concentration of dissolved solids in a liquid. For…
Read more →Join the Brew Club
Subscribe for exclusive deals on precision coffee equipment and expert extraction tips.