Green
Power Science is dedicated to the backyard scientist. Our belief is
that some of the smartest people in the world discover the best things
through trial and error IN THEIR OWN BACKYARDS OR GARAGES. We welcome
all levels of creativity and hope you find the answers you are looking
for. US SHIPPING $15 - WOW THATS A GREAT DEAL!!!!! O CANADA $27 Up for auction is a CRYSTAL CLEAR SPOT FRESNEL LENS HORIZONTAL MOUNT THE ACRYLIC ON THIS LENS IS THE SAME AS THE YOUTUBE VIDEOS BUT THIS AUCTION IS FOR A SMALLER LENS PICTURED VERTICAL DESIGNED FOR HORIZONTAL SOLAR USAGE! CAUTION! THIS IS A STRONG LENS
BEAM SIZE MAX POWER--.3 INCH (2.5" OUTER AREA 900 F)
FOCAL LENGTH---------31 INCHES
WEIGHT --------------7 LBS.
MAX TEMP. CLIMB------1490 F IR THERMOMETER
MAX COLLECTION-------1700F MATERIAL EST...........
MATERIALS TESTED
WATER------------12oz. BOILS 100 sec.
WOOD-------------FLAME .7 SEC.
ZINC-------------MELTS .5OZ 14 GRAMS - 21 SEC.
GLASS------------MELTS 1" X 1/4" BROWN GLASS 27 SEC.
CONCRETE---------GLOW 15 SEC. EXPOSURE, MELT 70 SEC.
NOT ALL FRESNEL LENSES ARE CREATED EQUALLY. ALL THE LENSES WE SELL WERE SPECIALLY SELECTED FOR THEIR SUN COLLECTING ABILITIES. ALL HAVE BEEN TESTED AND THEY ARE THE BEST OF THE BEST FOR SOLAR NEEDS. AS WE LEARNED YEARS AGO, NOT ALL FRESNEL LENSES WILL WORK WELL. WE PURCHASED 159 LENSES AND ONLY 37 WERE USABLE FOR SUN COLLECTION FROM THAT BATCH, THE REST WERE SCRAPPED. I WAS A PART OF A SOLAR ENGINE PROJECT. WE ONLY SELL SOLAR TESTED LENSES UNLESS OTHERWISE SPECIFIED. ______________________________________________________
THIS LENS HAS SCRATCHES WILL NOT AFFECT PERFORMANCE FOR SOLAR STUFF
CUSTOM MITER CORNERS
SECURE MOUNTING INSERT
MOUNTING HOLES PRE-DRILLED JUST ADD BOLT
WARNING NEVER LEAVE LENS IN SUN
Above photos show person in large rock bed work area and a steel washer that was exposed for 40 seconds. Also boiling water.
WARNING
: I have included a Youtube video to demonstrate the power of this type
of lens when placed in the sun. The lens should NEVER BE LEFT IN THE SUN UNATTENDED.
Fresnel lenses concentrate several square feet of sunlight down to less
than 1/2". My personal tests have resulted in surface temperatures in
excess of 2000 degrees farenheit WITH A SPOT LENS AND 900 degrees farenheit WITH A LINEAR LENS. VERY DANGEROUS. IF
YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR
SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH.
Stuff instantly can catch on fire. Buyer assumes all risks and agrees
that separating the lens from the protective cover is done so at their
own risk and responsibility. If you are crazy enough to use this for
sun collection I strongly recomend wearing protective eye goggles
(wielding/blow torch) to prevent eye damage. Protective clothing
(fireproof) is also recomended as well as a large open space away from
structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA!
By bidding on this item, buyer agrees to accept all responsibilities
and AGREES TO hold seller harmless from injury or damages resulting in
the use and possible mis-use of this item. MUST BE 18 years or older to
purchase.
AGAIN!!!!!!!!!!!!!
WARNING
: I have included a Youtube video to demonstrate the power of this type
of lens when placed in the sun. Lens should NEVER BE LEFT IN THE SUN UNATTENDED.
Fresnel lenses concentrate several square feet of sunlight down to less
than 1/2". My personal tests have resulted in surface temperatures in
excess of 2000 degrees farenheit. VERY DANGEROUS. IF
YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR
SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH.
Stuff instantly can catch on fire. Buyer assumes all risks and
responsibility. I strongly recomend wearing protective eye goggles
(wielding/blow torch) to prevent eye damage. Protective clothing
(fireproof) is also recomended as well as a large open space away from
structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA!
By bidding on this item, buyer agrees to accept all responsibilities
and AGREES TO hold seller harmless from injury or damages resulting in
the use and possible mis-use of this item. MUST BE 18 years or older to
purchase.WARNING
: I have included a Youtube video to demonstrate the power of this type
of lens when placed in the sun. Lens should NEVER BE LEFT IN THE SUN UNATTENDED.
Fresnel lenses concentrate several square feet of sunlight down to less
than 1/2". My personal tests have resulted in surface temperatures in
excess of 2000 degrees farenheit. VERY DANGEROUS. IF
YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR
SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH.
Stuff instantly can catch on fire. Buyer assumes all risks and
responsibility. I strongly recomend wearing protective eye goggles
(wielding/blow torch) to prevent eye damage. Protective clothing
(fireproof) is also recomended as well as a large open space away from
structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA!
By bidding on this item, buyer agrees to accept all responsibilities
and AGREES TO hold seller harmless from injury or damages resulting in
the use and possible mis-use of this item. MUST BE 18 years or older to
purchase.WARNING
: I have included a Youtube video to demonstrate the power of this type
of lens when placed in the sun. Lens should NEVER BE LEFT IN THE SUN UNATTENDED.
Fresnel lenses concentrate several square feet of sunlight down to less
than 1/2". My personal tests have resulted in surface temperatures in
excess of 2000 degrees farenheit. VERY DANGEROUS. IF
YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR
SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH.
Stuff instantly can catch on fire. Buyer assumes all risks and
responsibility. I strongly recomend wearing protective eye goggles
(wielding/blow torch) to prevent eye damage. Protective clothing
(fireproof) is also recomended as well as a large open space away from
structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA!
NEVER STORE EXPOSED LENS NEXT TO ANY STRUCTURE!!!!!!!!!! NEVER LEAVE LENS UNCOVERED WHEN NOT IN USE!!!!! By bidding on this item, buyer agrees to accept all responsibilities
and AGREES TO hold seller harmless from injury or damages resulting in
the use and possible mis-use of this item. MUST BE 18 years or older to
purchase. THIS IS NOT A TOY, REAL SCIENCE STUFF!!!!!
Happy bidding and goodluck.
SHIPPING IS $15. ITEM WILL SHIP VIA FEDEX GROUND OTHER SPOT LENSES IN ACTION
FREQUENTLY ASKED QUESTION: SPOT LENS VS. LINEAR LENS, WHAT IS THE DIFFERENCE? I MADE THIS WEB PAGE LINK TO EXPLAIN THE DIFFERENCE. FRESNEL LENSES (LINEAR AND SPOT) understanding the difference. PLEASE CONTACT ME THROUGH EBAY FOR ANY QUESTIONS. I WOULD BE GLAD TO HELP!
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