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-   -   Digital Hydrometer (http://www.homebrewtalk.com/f11/digital-hydrometer-165292/)

Ernie Diamond 02-26-2010 08:00 PM

Digital Hydrometer
 
Is there such a thing as a digital hydrometer? Can't some brilliant individual come up with a dual hydro/thermo that calculates actual gravity?

Anyone have ideas on this? I can't be the only one sick of using the glass tube.

ajwillys 02-26-2010 08:05 PM

Sure, here's a "Low Cost" version for the low price of $1695

http://www.coleparmer.com/catalog/pr...sp?sku=2575504

Still sick of the hydrometer? You can also use refractometers. Mostly for OG, but there are some calculations that can be used for FG as well. I only use mine for OG though.

BarleyWater 02-26-2010 08:10 PM

How about an automatic temperature correcting refractometer? It's what I and many others use. Only $30, well worth the price once you realize how fragile hydrometers are.

http://cgi.ebay.com/0-32-ATC-Portabl...item35a2ac9380

Sawdustguy 02-26-2010 08:27 PM

Quote:

Originally Posted by Ernie Diamond (Post 1911556)
Can't some brilliant individual come up with a dual hydro/thermo that calculates actual gravity?

Oh sure, we just snap our fingers and the technology to make a digital Hygrometer for $100 appears. :p Yea, they are out there but they are not cheap. They go for better than a grand. It seems that the technology of the sensor is expensive.

This unit is $1695.

http://static.coleparmer.com/large_images/2575504.jpg

This little bad boy is $2200.

http://static.davis.com/large_images/25750_11.jpg

This jobber is $3800.

http://static.coleparmer.com/large_images/2575040.jpg

kladue 02-27-2010 12:56 AM

From what I can observe of the industrial versions it appears they use a tuning fork configuration. I am not sure if it is drive power to maintain output or resonant frequency shift in response to viscosity. If I could get my hands on the manual it might explain the calibration procedure which would reveal the method used for sensing viscosity changes.


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