Hydrometers
Contents:
- Laboratory hydrometers
by laurence/cco.caltech.edu (Dustin Lee Laurence) (18 Oct 1993)
by laurence/cco.caltech.edu (Dustin Lee Laurence)
Date: 18 Oct 1993
Newsgroup: rec.aquaria,alt.aquaria,sci.aquaria
Anthony asked about finding better hydrometers. The best one I have
found is in the 93-94 Cole-Parmer catalog, catalog number G-08292-16
on page 536, in the precision hydrometer column on the heavier-than-
water table. Vital stats are as follows.
Range: 1.000-1.070 s.g.
Divisions: 0.0005 s.g.
Length: 325mm/13in
Price: $20.50
The calibration temperature is not listed in the catalog. Over the
phone, they told me that they are calibrated at aproximately 25.6C.
It does not appear to have a built-in thermometer. Note that this
is an enormous hydrometer by hobby standards; I would guess that the
enlarged end may be an inch in diameter and five inches long.
They also sell a 15 5/16"x 2" dia. hydrometer jar, G-06135-65, for
$10.40, which is of course optional.
There is another hydrometer listed as being for "salt", but I think
it measures % saturation with NaCl, not seawater. Funny how some
words take on a new meaning--I never use table salt, so I often think
of seawater mix when I think of just plain salt.
I intend to order one, probably today. They don't take American
Express, so I'll probably have to wait until the check clears before
I get it and can say how well it works.
Cole-Parmer can be reached at
COLE-PARMER INSTRUMENT CO
7425 N OAK PARK AVENUE
NILES, IL 60714 USA
Fax: (708) 647-9660 Phone: (800) 323-4340
or
LABCOR VENTES TECHNIQUES INC
7565 AVE MB JODOIN
ANJOU QUEBEC HIJ 2H9 CANADA
Fax: (514) 355-7119 Phone: (514) 355-6100
Dustin
The Krib
Marine/Reefs
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