What exactly does TDS tell us?

What exactly does TDS tell us?

Philadelphia’s Café Don Pedro Seeks to Build Up Small Businesses

A Dominican-owned coffee roasting company called Café Don Pedro recently launched in Philadelphia with ambitions for direct trading and boosting more Latino-owned small businesses throughout its supply and distribution networks….


The 2023 Specialty Coffee Transaction Guide Has Landed

The 2023 edition of the Specialty Coffee Transaction Guide (SCTG) guide went live today, providing actors throughout the coffee chain a data-driven tool for green coffee price discovery. The full…


5 Amazing Coffee Drinks in Reno, Nev.

Here are some standout specialty drinks you can try in the Biggest Little City in the World. BY EDDIE P. GOMEZSPECIAL TO BARISTA MAGAZINE Photos by Eddie P. Gomez Reno, Nev., has more cafés per capita than just about any other place in North America. And because it is a snowier-than-usual winter in northwestern Nevada […]


Hawaiian Legislators Introduce Bills for Stricter Coffee Labeling

Legislators representing the Kona district of Hawaii have introduced a series of bills that would require more strict labeling requirements for single-origin coffees and blends containing Hawaiian-grown coffees. Some Kona…

What exactly does TDS tell us?

Coffee News Recap, 2 Feb: Applications open for Australia’s Richest Barista 2024, De’Longhi reports 4.6% revenue increase after La Marzocco move & other stories

Every Friday, Perfect Daily Grind rounds up the top coffee industry news from the previous week. Here are this week’s coffee news stories. The word of the week is: expansion. Mon, 29 Jan AeroPress launches limited-edition Clear Pink brewer. The coffee brewer is made from the same Tritan material used in the standard Clear model. […]


Exploring the Potential of Drones in Coffee Production 

New drone technology has the potential to revolutionize coffee farming from the air. BY VASILEIA FANARIOTISENIOR ONLINE CORRESPONDENT Cover photo by David Henrichs via Unsplash In an ever-evolving technological landscape, coffee producers have begun turning to drones in an attempt to increase efficiency and operations. These unmanned aerial vehicles (UAVs) offer a wide range of […]


Brewing at Home and on the Road with Justin Pierce

In this series, we ask coffee professionals how they like to drink their coffee while at home and when traveling. BY TANYA NANETTISENIOR ONLINE CORRESPONDENT Feature photo courtesy of Justin Pierce Coffee professionals tend to spend most of their days brewing coffee. Baristas brew coffee behind the bar for their customers. Roasters brew it to […]


Weekly Coffee News: Grounds for Health Week + Iconic SF Shop Closes

Welcome to DCN’s Weekly Coffee News. Keep up with all the latest coffee industry stories and career opportunities by subscribing to DCN’s newsletter. Tell our editors about your news here. Registration Opens for Inaugural…

What exactly does TDS tell us?

Joven and Atucún Join Forces to Empower Young Farmers

The two brands have collaborated to create a unique coffee bar and support young farmers in the coffee and cacao industries. BY VASILEIA FANARIOTISENIOR ONLINE CORRESPONDENT Photos courtesy of Joven Coffee  For their first-of-its-kind bar, Joven Coffee and Atucún Chocolateria combined coffee beans, extracted cocoa butter, and organic cane sugar. Committed to supporting young farmers […]


Bypass coffee brewing: How can it improve extraction?

There is a lot of science to brewing coffee. Whether knowingly or unknowingly, we trigger – and try to control – an almost endless number of chemical reactions to achieve the perfect extraction. To do so, we have to tweak different variables – such as grind size, temperature, and coffee-to-water ratio – to get the […]


Ethos Agriculture’s Journey from Vision to Impact in Coffee Sustainability: Part Two

In the second half of this article, we discover how the Coffee Barometer attempts to bridge the gap between discourse and action, envisioning a sustainable future for the coffee sector. BY VASILEIA FANARIOTISENIOR ONLINE CORRESPONDENT Featured photo courtesy of Rodrigo Flores via Unsplash As we embark on the second part of our conversation with Ethos […]


Test Drive: The Linea Micra Espresso Machine from La Marzocco

Ready to find out how La Marzocco’s Linea Micra measures up? Read on for our full Test Drive review!  BY VASILEIA FANARIOTISENIOR ONLINE CORRESPONDENT Photos courtesy of Vasileia Fanarioti  The Linea Micra espresso machine by La Marzocco is the newest addition to their impressive line of home espresso machines. I was lucky to get my […]

What exactly does TDS tell us?

What exactly does TDS tell us?

minimum dose size?

Jan 31, 2024 |

I use the Hario switch to brew my coffee and am trying to reduce my caffeine consumption. Hence I would like to brew smaller cups of coffee. I am currently using 10g of coffee with 160g of water. (1:16 Ratio) I am wondering if there is a minimum amount of coffee...

What exactly does TDS tell us?

So TDS Stands for total dissolved solids and is used commonly by the Coffee community to measure "extraction yield" in percentages, or similiar.

The meter itself, as far as I know, measures the samples conductivity, especially focussing on dissolved/dissociated metal cations. A review on another tool, which may be more interesting because of it's higher specificity, has been done by James Hoffmann (the Coffein Meter).

My point is, that in my mind, metal cations could as well be from the metal used in boiling the water, burrs grinding the (slightly acidic Coffee), paper Filters, and other stuff. Of course, you probably could calibrate your device with such data, tho I wonder how much these variables are dependend on external factors, therefore a calibration being close to useless. Also, I don't see anybody publishing their calibration results…

So, what exactly does a TDS Meter tell us?

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What exactly does TDS tell us?

Perfect Little Beans

Chinmey Hill Coffee uses specialty-grade beans with zero primary defects (such as black beans or sour beans) and less than five secondary defects (such as broken beans). This is important because primary defects will greatly affect the taste of the coffee. Having zero defects allows the coffee to be the most optimal flavor.

Window for Optimal Flavor

Chimney Hill Coffee ships our coffee the same day it was roasted, so you will receive it before it enters the window of optimal flavor.  This means you’ll never miss the opportunity to enjoy the coffee’s peak flavor.

Coffee Ratings

Coffee undergoes many scoring processes by professionals who achieved their Q Grader certification. Coffee is first graded when it’s green. If there are defects the coffee is determined to be “not-specialty grade”. For those coffees that pass green grading, they are sample roasted and cupped. (Cupping is the official term for critically tasting and scoring coffees. The official cupping form is standard worldwide, and where the 100-point scoring system comes from.) A coffee’s dry fragrance, wet aroma, flavor, aftertaste, body, acidity, balance, and overall impression are taken into consideration while uniformity issues and defects, will lower the overall score.

Specialty Coffee

Specialty coffee, coined by Erna Knutsen in 1974, refers to a coffee that receives a quality grading score of 80 percent or higher. While “premium” or “gourmet” seem like they’re synonymous with “specialty,” they simply are marketing terms with no defined standards. Specialty coffees are grown in specific and ideal micro-climates, and have distinctive and unique flavor profiles, with little to no defects.

Third-Wave Coffee

We’re currently in the third wave of coffee. The first wave of American coffee put pre-ground, vacuum-sealed cans in kitchens across America. The second wave started with the late ‘60s introduction of Peet’s coffee (by Alfred Peet) through the proliferation of Starbucks. The third wave of coffee focuses on origin transparency, nuanced flavors, and artisan roasting. The term “third wave” is synonymous with specialty coffee.

What exactly does TDS tell us?

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