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BOSS CT&E10 TDS Coffee Tea & Espresso Refractometer Brix, Cold Press


  • $ 9999
  • Save $ 850


BOSS CT&E10 Coffee, Tea & Espresso (CT&E) Refractometer & TDS Meter
See how the BOSS Coffee, Tea and Espresso (CT&E) Refractometer stacks up against the digital coffee refractometers of the world (Atago PAL-Coffee, VST LAB Coffee-Espresso III, and more)!
Are you using a brewing App?  This will work with ANY App that needs TDS!
Are you making ready to drink coffee (hot or cold), tea, espresso or coffee concentrate and not currently using a TDS meter?  Chances are you aren't quite sure how strong your coffee really is. 

You grind.  You weigh.  You pour your water.  You measure your water.  You then brew.  Even with consistency, your brew will be different from the batch before.  Track your finished product?  Well, dial in your coffee recipe and know exactly what you are producing with this handy device.  


Our Coffee, Tea and Espresso (CT&E) TDS Meter / Brix Refractometer gives you an accurate yet very affordable way for measuring your beverages total dissolved solid levels, and give you the confidence in knowing exactly what you are serving. 

What is a TDS Meter?

A TDS meter will give you a visual of how strong your coffee actually is.  TDS (Total Dissolved Solids) is a measurement used to tell you how much you have extracted from your coffee or tea. 

What Should My CT&E TDS Be?

To each their own when it comes to making coffee.  But a good ready to drink cold brew in our opinion is typically around 1.6 TDS. As you start doing concentrates, this number will get higher. 

How do I use the Refractometer for my brew?

Measure your water and grounds before you brew.  Next, take a sample of your brew and strain it through a coffee filter and let the drops settle on the prism of your refractometer.  You don't need to buy $89 filters when you can use the same coffee filters you use everyday.  Let the sample cool off before continuing on - 30 seconds for a few drop sample.  Look through the eyepiece of the refractometer and you will see a line where the top blue field and the bottom white field meet.  Write down your findings and taste your creation!

Can I use this refractometer with Coffee Apps?

Yes!  Plug in your findings into any of the major coffee apps on the market to maximize your findings.  These apps are generally under $10 and a huge bargain for the average joe (pun totally intended!).



Scale #1 - % Brix 
Range: 0-10.0% Brix
Divisions: 0.1% Brix
Accuracy: +/-0.1% Brix

Scale #2 - TDS (Total Dynamic Solids)
Range: 0-8.4 TDS
Divisions: 0.1 TDS
Accuracy: +/-0.1 TDS

Comes with a white cardboard box, users guide, wiping cloth, (10) 3ml transfer pipettes and calibration screwdriver

Calibration is with distilled water and instructions on how to calibrate it come with the unit.


Here's the comparison for the BOSS Coffee Tea and Espresso Refractometer versus the Atago PAL-Coffee and the VST LAB Coffee-Espresso III

BOSS Coffee Tea and Espresso Dual Scale Refractometer ($89.99):
Brix Range: 0.0-10.0% Brix
Brix Resolution: 0.1% Brix
Bris Accuracy: +/-0.1% Brix

TDS Scale: 0,0-8.4% TDS
TDS Resolution: 0.1% TDS
TDS Accuracy: +/- 0.1% TDS <---- This is the number that counts

Atago PAL-Coffee ($350+):
TDS Range: 0.00-22.00% TDS
Resolution: 0.01% TDS
Accuracy: +/-0.15% TDS <---- Slightly better than the BOSS unit

HM Digital RCM-1000BT Coffee Refractometer ($399.99):
Brix Range: 0.0-26.0% Brix
Brix Resolution: 0.01% Brix
Bris Accuracy: +/-0.2% Brix

TDS Scale: 0,0-23.0% TDS
TDS Resolution: 0.01% TDS
TDS Accuracy: +/- 0.2% TDS <---- LOWER than the BOSS CT&E10, but for $310.00 MORE!

VST LAB Coffee-Espresso III ($729-$1675):
TDS Range: 0.00-20.00% TDS
TDS Resolution: 0.01%
TDS Accuracy: 0.00-4.99% TDS Range - +/- 0.03% TDS, 5.00-20.00% TDS Range - +/-0.05% TDS <---- More accurate, but way more expensive

National Industrial Supply

30777 Rancho California Road #891420
Temecula, CA 92589
Office: 310.748.6858  -  Fax: 310.733.5480  -  -