The 3-in-1 Auto Digital Coffee Refractometer measures coffee TDS, Brix, and refractive index. It suits buyers looking for a coffee refractometer to check brew concentration when fine-tuning coffee or maintaining production consistency. Choose it by matching its measurement ranges and stated accuracy to your work, rather than by resolution alone.
The listed measurements cover concentration and refractive index. Extraction yield calculations and espresso-specific sampling instructions are not described; check the manual if those are essential to your workflow.
Choose the Configuration for Your Measurement
- Order identification: The listed SKU is INS04-RM2008, with no named option to select.
- Measurement ranges: Check that your samples fit the coffee TDS range of 0-25%, Brix range of 0-30%, and refractive index range of 1.3330–1.4200nD.
- Accuracy versus resolution: TDS and Brix resolution is 0.01%, while stated accuracy is ±0.2%. Decide whether that accuracy meets your concentration-checking needs.
- Sample handling: The minimum sample volume is two metric drops. Plan to clean the sample plate with distilled water and dry it with a soft cloth or paper towel after each sample type.
- Power: A 9V battery is required and is not included. The stated battery life is 5000 readings, with automatic shutoff after one minute of non-use.
Product Details and Specifications
Description
The 3-in-1 Auto Digital Coffee Refractometer is a must-have tool for coffee professionals and enthusiasts seeking precise measurements of TDS, Brix, and refractive index in their brews. This advanced optometry equipment ensures accurate readings, making it ideal for perfecting coffee concentration and flavor profiles.
Features:
-
Coffee TDS Concentration Range: 0-25% TDS (SO2)
- Resolution: 0.01% TDS
- Accuracy: ± 0.2%
-
Coffee Sugar Brix Range: 0-30% Brix (SO1)
- Resolution: 0.01% Brix
- Accuracy: ± 0.2%
-
Coffee Refractive Index: 1.3330―1.4200nD (SO3)
- Resolution: 0.0001nD
- Accuracy: ±0.0003nD
Specifications:
| Parameter | Details |
|---|---|
| Ambient Temperature | 10-100 degrees |
| Measurement Time | Approximately 1.5 seconds |
| Minimum Sample Volume | 2 metric drops |
| Light Source | Yellow LED |
| Sample Cell | Stainless steel ring and flint glass prism |
| Case Material | ABS |
| Enclosure Rating | IP65 |
| Battery Type / Life | 9V / 5000 readings (not included) |
| Auto-Off | After 1 minute of non-use |
| Dimensions | 58*25*121mm |
| Weight | 350g |
Designed with the coffee expert in mind, this coffee refractometer provides quick and reliable results, with a minimal sample requirement of just 2 metric drops. Its IP65-rated enclosure ensures durability, while the high-precision optics guarantee accurate measurements every time. Whether you’re fine-tuning a brew or ensuring consistency in production, this tool is essential for achieving optimal coffee quality.
Coffee TDS , Sugar Refractometer
1. Please clean and wash the sample plate with distilled water and dry it with soft cleaning cloth or paper towel after finishing the measurement of one kind sample.
2. Never leave the remains and residuals of samples in the sample plate for long time.
3. After finishing measurements of the corrosive liquid, please clean the sample plate as quick as possible to avoid the irreparable damage of the prism and metal surface of the plate.
4. Please use soft cleaning cloth or paper towel to clean the sample plate to avoid scribing the prism’s glass,
5. Keep dropper and cleaning cloth to be clean and dry under the preservation.
6. If no using the instrument for a long time, please remove the battery and preserve it in a cool and dry place.
Questions Before Ordering
Does this coffee refractometer measure both TDS and Brix?
Yes. The description lists coffee TDS, Brix, and refractive index measurements. Check the stated ranges and accuracy against your measurement requirements before ordering.
Can I use it for espresso or calculate extraction yield?
The description identifies coffee concentration measurement but does not provide espresso-specific sampling instructions or state an extraction yield calculation capability. Check the manual for those requirements.
Is the battery included?
No. The instrument uses a 9V battery, which the specifications state is not included.
How should I clean it between samples?
Clean the sample plate with distilled water and dry it with a soft cleaning cloth or paper towel after measuring each sample type. Do not leave sample residue on the plate for long periods.
Selection and Use Guides
Free Shipping
Free shipping is available on all orders. Shipping methods and carriers may vary depending on the destination, order details, and available logistics options. Full Shipping Policy
Returns Policy
For returns and refunds, please review our full Refund Policy before placing an order. If you need help with an order, contact us before your order has shipped whenever possible. Full Returns Policy
When Will My Order Ship?
For Standard Shipping, we aim to pack and ship out your order within 4 business days. During special periods, such as heavy order processing or local inventory shortages that require deployment, please expect it to take an additional day or two for processing. We ship five days a week, Monday through Friday.
You will receive a shipment confirmation with tracking information via email when your order has shipped. Once you receive this email, we cannot change or cancel your order.
Can I Change The Shipping Address On My Order?
Please contact us immediately via email if you realize that you gave us the wrong shipping address — if it hasn't shipped yet, we might be able to correct it before it goes out the door.If your order ships to the address provided and is returned to us as undeliverable, then you are responsible for paying the cost of shipping again to resend it to you. If you decide you do not want your order reshipped, we'll refund you for the products less the original shipping charges, once your order returns to our warehouse. We'll reach out to you to coordinate your options before re-shipping.
If your order ships to an incorrect address provided at the time the order is placed and is not retrievable, we are not responsible and cannot offer reimbursement.
Unable to find satisfactory answers ? more FAQs
Let customers speak for us
My first impression after opening and installing batteries was that this meter is very well built considering the price and manufacturer. I had read some reviews stating that it's amp measurements were not accurate below 5 amps, I haven't seen any issues in any measurements I've taken, even side by side with my fluke meters. I've successfully taken accurate amp, voltage and continuity measurements with this ETCR6920B, the display is nice and legible. I haven't tried storing data and making transfers to a PC yet, the soft case is good enough for storage on a shelf and the test leads are of good quality and rated for 1000v. There's nothing bad to say about this meter especially when you consider the price, it's a really great meter.
Works as described.
