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Hydrometers

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  1. Laboratory hydrometers
    by laurence/cco.caltech.edu (Dustin Lee Laurence) (18 Oct 1993)

Laboratory hydrometers

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


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