Hydrometers for Biodiesel
Hydrometers For Biodiesel
Find out more about hydrometers and there use during the manufacture of biodiesel
biomass | transportA
hydrometer is a simple (typically glass) instrument used to measure the
density of liquids.
Usable
biodiesel has a density of
0.86-0.90 g/ml (grams per millilitre - pure water is roughly 1g per ml). Therefore a
hydrometer which covers that full range is required to check the quality of biodiesel produced. A
brewer's hydrometer is
unsuitable as the general density range for brewers measuring liquid as sugar turns to alcohol is 0.990-1.070 g/ml.
The
hydrometer used in the commercial production of biodiesel is a
BS718 M50SP with a range of 0.850-0.900 g/ml. It is 270mm long with 0.001 g/ml divisions, and +/- 0.0006 g/ml at 15 degrees Celcius.
For domestic (non-professional) production of biodiesel a cheaper option would be a
BS718 M100 with a range of 0.800-0.900 g/ml, 0.002 g/ml divisions, and 0.002 g/ml accuracy at 20 degrees Celcius. This hydrometer is 250mm long.
Stevenson Reeves Ltd has the following very useful guide:
How to Use a Hydrometer.
Click here for more information about
biodiesel equipment.
Article Last Modified: 12:23, 16th Dec 2008Comment on this Article
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neil@reuk.co.uk.
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