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manufacturer's 33 gauge, 10 degree single
beveled tips. With a 35 gauge tri-surface
beveled tip, the resistance to the penetration
becomes even less. Each of our tips undergo a
penetration test before leaving the factory to
guarantee the best results for our customers.
7762 and 7803 series removable needles in
both tip length and outer diameter. However,
our beveled tip version is shorter, more durable,
and penetrates better due to the special tri-
surface grinding technique. In the past, 33
gauge tips were the smallest size sold by other
manufacturers and were frequently cited in
literature. However, our new 35 gauge tip
is much better for injections involving small
animals, especially mice. Compared with
Hamilton' 33 gauge, 10 degree beveled tip, our
35 gauge 25 degree beveled tip can reduce
the depth of penetration by almost 80%. The
distance between the tip and the upper rim
of the opening (section F on Figure 2) is 348
microns for the 33 gauge tip. The distance
for our 35 gauge tip is only 230 microns.
In addition, the smaller tip size significantly
reduces the required penetration force. In nearly
all applications, a 33 gauge tip can be replaced
with our 35 gauge tip and produce better
results.
is too weak and the 33 gauge is too large, this
makes a good alternative.
trial. The combination of its strength, length,
durability, and clogging resistance creates a
balance with very little compromising of the
individual properties. It is much smaller than the
33 gauge tip offered by other manufacturers. It
is only slightly larger than the 36 gauge tip but
is much stronger and less likely to be clogged.
Samples can be directly loaded with this tip. Its
5 mm length is sufficient enough for almost all
injection applications in mice.
it can be inserted into the opening of the 33
gauge needle tip. Because this is pushing the
limits of what current technology can produce,
there are some limitations to consider before
using. Its thin diameter makes it necessary
to limit its length to 2.5 to 3.0 mm and still
in the 25 to 50 micron range, it is very easily
clogged. Therefore, only well filtered solutions
can be used. Depending on the viscosity of the
sample, the user might also need to pre-load
the syringe with a regular tip before switching to
this tip for injection. We recommend using the
35 gauge tip instead of the 36 gauge unless it is
absolutely necessary.
durability. This "semi-flexible" tip can be bent up
to 90 degrees without damage. It is also much
more corrosion resistant than the stainless steel
tip. Saline solutions left in the tip will be less
likely to clog it. Although this tip is specified
smaller than our 33 gauge stainless steel tip.
coated quartz tubing with a special adapter
sleeve mounted at the end. It is designed for
filling glass capillary electrodes or pipettes, just
like WPI's traditional MF34G Microfil. However,
unlike the traditional MicroFil, which has about
50 microliters of dead volume in its luer hub,
the dead volume of this tip is less than 0.6
microliters. It is useful for loading electrodes
with solutions that have a limited volume or are
too expensive to waste.
NF33BL-2
NFINHLD