
Thinner than a human hair! Smoother than a baby's bottom! More absorbent than an enthralled groupie! Its a microfiber miracle cloth. It really is amazing folks. A 6" square cleaning cloth woven of 90,000 microfibers per sq. inch, each 0.5 mm dia. Super absorbent, it can be used wet or dry to clean the most delicate lens, CD, or for that matter, your car or kitchen counter. "As seen on TV" except this one really lives up to the hype. You need several to clean super clean where it really counts. Like your specs and other coated optics.
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91497 CLOTH, CLEANING, MICROFIBER |
High tech comes to Am Sci & Surp!! It is here in the form of a Peltier junction, a thermo-electric device that translates electric power into heat, and perversely, into cool. Apply current @ 3-12 VDC to the gizmo and it extracts thermal energy from one face, thereby cooling it. The heat is dumped onto the other face, thereby heating it. Please note: you must use a heat sink on the hot side or the junction will fry itself, since it can quickly create a 65° C temperature differential in a no load situation. Stack two, or build a cascade to increase the thermal differential created. Or run it backwards. Apply heat or cold to the relevant face and produce a current. Amazing for science projects and experiments. Practical for coffee warmers, beer coolers and mini-refrigerator or warming oven applications. Comes with instructions. Large is 1-9/16" sq. x 3/16" thick.
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89143 LARGER PELTIER JUNCTION |
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