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Digital Multimeter
3-1/2 digit LCD electrical multimeter with a max reading of 1999. Measures (5) ranges of DC, (2) ranges of AC voltage both to 500 V, (5) ranges of resistance to 200K ohms, DC current to 10 Amp., diode test, transistor and battery test. A pocket sized 2-7/8" x 5-3/4" x 1-1/2", it comes complete with test leads and 9 volt battery. The best value for this size we have seen.
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89416 DIGITAL MULTIMETER |
Peltier Heat Pump
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 |
Rotary Tool Set
Not every well-made rotary tool is a big-D. We consider this one not only a good-quality tool, but an excellent buy. The fitted plastic carrying case 12" x 8-1/2" x 3-1/2" contains not only the 120VAC-powered 8,000-30,000 rpm mini grinder, but a stand with a C-clamp to mount it on a bench or table, a 3-ft extension shaft, and a good assortment of bits, grinding stones, cut-off wheels, etc, including collets to fit 1/8" and 1/16" bits. The telescoping stand extends from 10" to almost 22" and holds the tool above your work, while you grind, sand, cut, etc., with the tip of the convenient, easy-to-grip, flexible extension. A nice package, and a very nice gift for yourself, or for anyone who enjoys working with hobby tools.
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92283 MINI GRINDER |
$34.95
EACH
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Roto-Cornucopia
All together now, boys and girls, can you say BARGAIN? A bonanza assortment of (100) 1/8" shank rotary tool attachments: wheels, brushes, stones, sanding wheels, buffing pads, and sundry other stuff. All in a nice wooden box with the latch on upside down-so write "top" on the top. Is that why it's here? That, and the cardboard sleeve that tells us to heed an "importan" warning.
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36142 ROTARY ACCESSORIES |
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No Marbles. Lots Of Water.
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
Give Rube Goldberg a faucet, and this set would really have turned him on. The 300-piece hydrodynamic building set (lots of Rube tubes) lets you construct 1:87-scale models of refineries, distillation facilities, water treatment plants, or anything similar. Includes gantry parts, tubing, assorted vessels, tanks and valves, a tilt scale, ball flow meter, water wheel, mini-signage, and a 12V water pump. Comes in a 17" x 11" x 3-1/4" carrying case that doubles as a leak-proof mounting platform. It has a well-written 15pp instruction book. Can you say Science Fair?
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93366 HYDRODYNAMIC DELUXE BUILDING SET |
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How Twee!
Nothing more twee than tweezers. These stainless steel flat-tip tweezers are 3-1/2" long with 5mm jaws that open to a maximum of 1/2". Equally useful for handling small parts or removing thorns from paws. You'll get a package of (4).
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38462 FLAT TWEEZERS |
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