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Magnifiers, continued
Magnifier, Reading Glass
Low priced glass, wide field, hand-held.
Catalog No. Description Power Diameter Price/Each Price/Pkg. of 10
AP8256 Magnifier,
Reading Glass
2.5X 2" $ 6.85 $65.10
AP4386 2.5X 21/2" 8.81 83.70
AP4387 2X 3" 9.36 88.90
AP4388 2X 4" 10.50 99.80
Magnifier, Tripod
Wide field lens in focusing mount. Useful in elementary biology. 10X magnification.
Diameter of lens 20 mm.
Catalog No. Description Price/Each Price/Pkg. of 10
AP8255 Magnifier, Tripod $10.40 $98.80
Magnifier, Jumbo, Folding
Jumbo 10-cm lens with 5X magnification is mounted on a sturdy plastic self-supporting
frame—keeping both hands free. The 13-cm square base has metric and English
graduations molded into the plastic.
Catalog No. Description Price/Each
AP6020 Magnifier, Jumbo, Folding $16.38
APPARATUS MAGNIFIERS
Magnifier,
Pocket, Folding
AP4384
Magnifier,
Reading Glass
AP8256, etc.
Magnifier,
Reading Glass
AP4385
Magnifier,
Tripod
AP8255
Magnifier,
Jumbo,
Folding
AP6020
Magnifier with Stand
The 21/2" diameter magnifier is mounted on a black base. Double universal joints
provide easy focus and adjustment. Magnification is 2.8X.
Catalog No. Description Price/Each
AB1135 Magnifier with Stand $25.53
Magnifier
with Stand
AB1135
Mantles, Heating and Accessories
Heating Mantle
Safe, efficient, form-fitting heaters for evenly distributed applications of heat to round
bottom flasks and similar shaped vessels. The heating elements are thoroughly
enclosed in an insulating glass fabric that makes the mantle suitable for heating
flammable liquids for which other forms of heating would not be safe. The glass fabric
is covered with grounded stainless steel mesh providing extra safety in case of an
accidental spill. Temperature limit is 450 °C. Input must be regulated by a variable
temperature controller (such as Catalog No. AP4434) to control heating and protect
the heating mantle.
Catalog No. Description Size Price/Each
AP7231 Heating Mantle 100 mL $335.40
AP7232 250 mL 399.00
Temperature Controller
Set and regulate temperature for heating mantles listed above. Controller compensates
for line voltage fluctuations and ambient temperature changes. Maximum load
current is 15 amps. One standard, duplex outlet included. Five-foot, three-wire cord
and plug also provided.
Catalog No. Description Price/Each
AP4434 Temperature Controller $312.82
Heating Mantle
AP7231, etc.
Temperature
Controller
AP4434
Melting Point Apparatus
Avoid the hazards associated with traditional oil baths
or mercury thermometers—use the melting point
apparatus to easily and accurately determine melting
points. The melting point apparatus offers many notable
features:
• Provides precise melting points up to 400 °C.
• Temperature resolution of 0.1 ºC.
• Accepts up to three samples simultaneously using glass
capillary tubes.
• Fits up to 2 mm diameter capillary tubes.
• Press a key to record up to six readings without need to make a written record.
• Oven temperature automatically reverts to ramp-start setting; test consecutive
samples under identical conditions.
• 8X magnification focusing eyepiece and light give a clear view of the heating block.
• Safe and quick to use—unit heats up or cools down within just 5 minutes.
Melting point apparatus unit comes complete with a package of 100 capillary tubes
and instructions; 115 Volts.
See free video at flinnsci.com.
Catalog No. Description Price/Each
AP7431 Melting Point Apparatus $1915.00
GP7047 Capillary Tubes, 90 mm length, 100 tubes/vial 13.00
Digital vs. Mercury Thermometers
Melting Point Determination
For years, mercury thermometers set the standard for accuracy in melting point
measurements. Accuracy came with a cost—a high cost in many cases—the hazard
of broken thermometers, mercury spills and environmental contamination. More and
more states are now banning all mercury thermometers for this very reason. Concerned
about the safety of teachers and students, and dedicated to maintaining quality science
education, we recently compared the accuracy and precision of melting point instruments
equipped with mercury and digital thermometers. We tested three different
standard samples and found no difference in accuracy and improved precision using
the new melting point apparatus with precision digital thermometer.
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