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Step On It
Perfect for hands-on hobbyists. Foot-pedal speed controls free up your paws to do the real work. This one's for 120VAC devices, and ideal for machines using approx 200W or less. Measures 5" x 3" x 2-1/4" tall, with a 6-foot cord that plugs into the wall and a grounded female plug for your sewing machine, rotary tool, scroll saw, or, if you really make a lot of banana Daiquiris, blender.
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93239 FOOT PEDAL |
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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 |
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 |
Wrap Around Heating Element
Resistive element insulated and wrapped in soft, flexible (fiberglass) jacket. The wrapped section is about 27 inches long and about 3/16" in diameter. Each end has a 4 inch insulated lead, but one end is a single strand solid wire and the other is a seven strand braid. We haven't any idea where the marriage takes place! Anyway, they're rated at 90 watts. Plug 'em into 110 VAC and the thing heats up to the point that it's quite hot to the touch - too hot to hold onto. Wrap it around whatever it is that you need to keep warm and make your own heating systems. Make yourself a coil and you can probably keep your coffee pot hot. Or operate it at 12 volts as a telescope dew chaser. You'll notice some smoke when you plug it in the first time, but this won't happen once it's burned in. Happy heating by Hot Watt. Melanie, Tory, and Donna all want one!
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1490 HEATING ROPE |
Decibel Meter
'Tain't a toy, McGee. And 'tain't surplus. This digital dB meter from Sper Scientific is pocket-sized--8" x 1-5/8" x 7/8"--and measures sound levels from 32 to130 dB with a built-in 1/2" microphone using (2) "AAA" batteries (included). The resolution is 0.1 dB and it's accurate to within 1.5 dB. Has a built-in calibration oscillator and comes with a foam windscreen and small screwdriver for calibrating. It's very easy to use, with one-button operation on what the manufacturer calls the smallest, lightest dB meter on the market--to help you stay a step ahead of OSHA.
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92622 SOUND LEVEL PEN |
Testing, Testing
Something really special: a brand new 30MHz dual-channel Elenco S1325 oscilloscope. Comes with (2) probes. Switchable between X1 and X10. 400V P.P. max. Sensitivity is 1mV/DIV. Dual or single trace operation. Calibrated 20-step timebase with an X10 magnifier. Auto/Norm triggered sweep operation with AC, TV-H, TV-V and line coupling. Fold-down carrying handle. If you need more information, we have a full tech sheet available. Comes with a 39-page operation manual. A great price for this analog oscilloscope.
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92150 OSCILLOSCOPE |
Best Test Kit
Just what your well-accoutered executive electrician is carrying today. The 5-piece electrical test kit includes a small digital multi-meter with leads, a 4-bulb neon lamp outlet tester, a screwdriver-type DC voltage probe (6-12VDC), a small induction-based voltage probe that can also check for breaks in wires, and a wire stripper/cutting tool-all in a compact zip-up black vinyl carrying case. From Omaha Industrial Tools
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92846 ELECTRIC TEST KIT |
$12.95
EACH
(was $14.95)
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Portable Oscilloscope
The Velleman HPS10 Personal Scope isn't some graphical multimeter -- it's the complete, portable, affordable oscilloscope you've been waiting for! The 10MHz oscilloscope has an analog bandwidth of up to 2mhz. It has 5mV to 20V/div sensitivity in 12 steps, and a 200ns to 1 hour/div time base in 32 steps, full automatic setup, and 5 different trigger modes. It measures dBm, dBV, DC and rms, has signal markers for Volt and Time, and 2 memories to store signals. It has an X and Y position shift signal, DVM readout with x10 option, and audio power calculation (rms and peak). Easy to use and, with a high-contrast LCD display (128 x 64 pixels), easy to read. Accurate enough for professional use on automotive and audio equipment, digital signals and various types of sensors, but priced low enough for educational and hobby applications. Requires (5) "AA" batteries or a 9V adapter (not included).
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92223 OSCILLOSCOPE |
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MiniMultiMeter
Our pocket-sized multimeter measures a tiny 3-5/8" x 1-3/4" x 1" thick, with a 3-1/2 digit display on a 1-1/4" x 9/16" LCD screen. Will measure up to 500VAC, 100VDC, current from 200uA up to 10A, resistance up to 2000K ohms, and will also test diodes and transistors. Comes with (2) 24" test leads and a battery to power it. Teeny price to match its size. Great for science fair projects.
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93148 MULTIMETER |
Meter That Volt
A nice price for a 0-10 volt DC voltmeter. The black-plastic housing is 4" x 5-1/2" x 3-3/4" high overall, with a slanted gauge face about 3-1/2" x 4". Red and black thumbscrew terminals for positive and negative inputs. Great for small school projects or testing batteries around the house.
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91698 VOLTMETER |
High Power Relay
A big guy. This chassis-mounted relay is rated for 30A at 300VAC, 15A at 600VAC, 25A at 28VDC, 1 hp at 120VAC, and 2 hp at 240VAC. Coil will draw approx 40mA at 120VAC, and needs at least 80VAC to engage the (2) sets of SPST contacts. Measures 2" x 1-3/8" x 1-1/2" with 1/4" Q/D terminals on the bottom and a 1/8"-32 mounting hole and a mounting tab on one side. Deltrol part number 23063-70
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37860 BIG RELAY |
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