Has anybody a link to a chart showing equivalent ppm TDS (total dissolved solids) readings as relative density values.
For those who are confused, if you get a suitable hydrometer it can tell you the TDS of your coffee. Water has a relative density of 1, if you float a hydrometer in it it will read 1, if you add salt to the water it will rise up and from the reading you can see how much salt was added, (like how people float better in seawater). So if you know the correct expected range for coffee you can buy a hydrometer in that specific range.
I found this one but it is very expensive
http://www.scaa.org/shop/product_detail ... id=R401300
For those who are confused, if you get a suitable hydrometer it can tell you the TDS of your coffee. Water has a relative density of 1, if you float a hydrometer in it it will read 1, if you add salt to the water it will rise up and from the reading you can see how much salt was added, (like how people float better in seawater). So if you know the correct expected range for coffee you can buy a hydrometer in that specific range.
I found this one but it is very expensive
http://www.scaa.org/shop/product_detail ... id=R401300
