Specific Gravity Hydrometers
Two types of hydrometers are offered. One is graduated
to read in specific gravity, the other in grams per liter
of suspension, both at 68° F (20° C). The 280 mm long
hydrometers are useful for determination of particle size
distributions of materials where absolute density has
little variation among sample particles.
The method calls for hydrometer readings for each
sample at 68° F over a 24 hour period. A 1000 ml
sedimentation cylinder, or hydrometer jar, is required for
each sample and cylinders must be maintained in a constant
temperature bath during this period. Cylinders are 18 in.
(457 mm) high x 2.5 in. (64 mm) diameter.
The circulating bath controls temperature at 68° F (20°
C) during sedimentation. Holds 8 cylinders, all accessible
with support brackets, and provides gentle, thorough
agitation and circulation. Tank has stainless steel
interior parts; exterior is uniform throughout bath at
±0.5° C. An over temperature safety cutoff is provided.
For the complete set of basic equipment needed for
hydrometer analysis, the Hydrometer Analysis Set is
available. Set includes six Hydrometer Cylinders 504-250
and one each 504-248, 504-249, 504-251, 504-253,
504-254, and 504-255.
Hydrometer Analysis Set, Complete 160 lbs.
Hydrometer 151H, range 0.995 to 1.038 S.G. by .001
divisions 1 lb.
Hydrometer 152H, range -5 to +60g/liter S.G. by 1g/ I
divisions 1 lb.
Sedimentation Cylinder 2 lbs.
Mechanical Stirring Apparatus 16 lbs.
Dispersion Cup 0.5 lb.
Constant Temperature Bath 205 lbs.
Sodium Hexametaphosphate 1 lb.
Imhoff Cone & Stand
This settling cone is used to determine settleable
materials in water and waste water samples. Clear cone is
externally graduated in milliliters from the bottom upward
and includes a leakproof plug.
This 1000 ml cone is constructed of clear, impact
resistant plastic. Each cone is externally graduated from
0 - 1000 ml for easy reading and accuracy, and has a
removable plug at the tip for removal of sediment.
The plastic coated steel stand, sold separately, will
hold up to three cones for repeated samples. Imhoff cones
Imhoff Cone 1 lb.
Stand 3 lbs.
Use Specific Gravity Hydrometers
These are two precision instruments for testing
specific gravity in liquids or soil. One specific gravity
hydrometer measures salinity in liquids, with graduated
divisions of 0.0005 and a range of 1.000° to 1.070°
Specific Gravity. The other is a Buoyoucos scale
hydrometer to determine specific gravity of soil, with a
range of -5 to 60 grams/liter in 1.0 increments. Use the
hydrometer jar for testing, sold separately.
Specific Gravity Hydrometer for Liquids 0.5 lb.
Specific Gravity Hydrometer for Soils 0.5 lb.
For use with the specific gravity hydrometer. Molded
clear plastic cylinder has a 500 mL capacity and a broad
base for extra stability.
Hydrometer Jar 0.5 lb.
Apparent Color Chart
This Apparent Color Chart is used to quantify the
apparent color of natural waters. It contains the 147
color standards that represent natural colors of aquatic
insects plus their habitats. Also includes several bright
colors, which may be associated with unusual discharges or
Apparent Color Chart 0.2 lb.