Distilled water should be used.
Some other points to consider.
"1. Temperature of the brine should be the same as specified in the brine table being
used. A 60°F Salometer will not give a correct reading at 38°F and vice versa.
2. Brine should be tested only in a straight walled cylinder of clear glass, set solidly
on a level surface. Any moisture that collects on the outside of the cylinder should
be wiped off.
3. Make sure that the Salometer stem is dry, clean, and free from grease, or caked
salt crystals, and that the Salometer does not touch the sides of the cylinder when
readings are taken.
4. Check new Salometers by placing them first in clear water, when the reading
should be 0°S at 60°F. Empty the cylinder, rinse with a saturated salt solution, then
refill with saturated brine at 60°F. Salometer should read 100°S.
5. Care must be taken to read the scale marking at the actual surface of the brine
when the Salometer has come to rest. This brine surface is not level, as brine
tends to rise along the sides of the cylinder and along the stem of the Salometer,
forming a concave surface known as a meniscus. For a correct reading, bring the
eye to a point level with the bottom of the meniscus."
Source: alkar.com
Calculations:
Since saturated brine contains 26.395% salt by
weight, each Salometer degree represents 0.26395% salt.
A 40 degree SAL brine is 10.558% salt by weight (40 x .26935.)
100-10.558=89.442
8.33/89.442=0.09313298003
0.09313298003x10.558=0.98329800317
0.983 pounds of salt per gallon of water for a 40% SAL brine.
A 50 degree SAL brine is 13.1975% salt by weight (50 x .26935)
100-13.1975=86.8025
8.33/86.8025=0.09596497796
0.09596497796x13.1975=1.26649779672
1.266 pounds of salt per gallon of water for a 50% SAL brine.
You`ll notice that the above numbers correspond with the numbers on the brine chart.
http://www.meatsandsausages.com/sausage ... king-brine..