
Here's a cost-effective tester that lets you determine the electromagnetic field around power lines, appliances, computer and communication equipment and industrial devices. The hand-held instrument measures EMF radiation from 30 to 300 Hz. Single axis. The range is 0.1-199.9 mG and 0.01-19.99 uT, with an accuracy of +/- 4%. The 5" x 2-3/4" x 1" plastic case has a 1-3/4" x 3/4" LCD display and a switch to toggle between micro Tesla and milli Gauss. It's quick, easy and reliable, and when you see the EMF around your old monitor, it will give you one more reason to buy the new one you want!
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92254 EMF TESTER |
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
The mouse is back! After an extended absence (due more to supply problems than to any rodent-eradication program) the gray rubber mouse is once again available. A hair under 3" long with a 4" long tail, he's diminutive and detailed -- and ready to move into Sis's underwear drawer!
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4831 RUBBER MOUSE |
Why does it do that? Develop an elemental understanding of magnetism, electromagnetism, electrochemistry, radio, thermodynamics, light and optics. Simon Quellen Field's 228-page paperback, Gonzo Gizmos, Projects & Devices to Channel your Inner Geek explains processes, equipment and scientific terms -- and then, for starters, tells you things like how to make a rotary steam engine in 15 minutes from a soda can, a candle and a few scraps of rubber tubing. It's the favorite of our resident geeks -- but not for kids unless they're working with an adult. That would be a mature adult. An insured, mature adult.
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92339 GONZO GIZMOS |
AKA wax carvers. Each tool is about 6" long, stainless steel, with a shaped head on each end. Set "B" has two smaller arrow heads, two sort of like golf clubs and two more small (1/8"+) "spoons". The smaller sizes mean slightly sharper edges and points, but they are still basically dull. You certainly could use them to model in wax, or in clay, or to sculpt plaster of Paris. Handy and unusual.
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89330 SCULPTING TOOLS, SET B |
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 |
Gadgeteers, get out your charge card. This is an instrument you absolutely have to own. It reaches down below sofa cushions, inside piggy banks, into fish tanks, and past a gallbladder. Not simultaneously, of course. The slim stainless steel alligator forceps is 11" long OA, with a 2-1/2" angled handle and an 8-1/2" reach. It has small 5/8" long serrated jaws, delicate but tight, at the very tip! Better buy an extra. We guarantee people are going to "borrow" these if they see them.
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92452 ALLIGATOR FORCEPS |
Optimize the power of your microscope and get the sharpest possible image with a drop of clear, colorless immersion oil between the lens and your slide. This 0.5 oz tube of low-viscosity Resolve® Immersion Oil from Richard-Allan Scientific has a refractive index of 1.5150. It is non-drying and non-hardening, and will not damage lenses or valuable slides. But it will definitely enhance your view!
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92532 IMMERSION OIL |
Start with one naked wire or a number of them, and a piece of our clever tubing, and end up with nice, tightly covered wire. For the specific diameters below, our each is a package of (10) 12" pieces of heat-shrink tubing. For an assortment of sizes, our each is a dozen pieces of 4" long tubing. You'll get (4) pieces each in 1/8", 1/4" and 1/2" diameters. All sizes are black. All will shrink to trim diameters half their current size when heated to 125°C/257°F. If only it worked on waistlines.
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92441 1/2" SHRINK TUBE | |
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93365 1/8"-1/2" ASST. SHRINK TUBE |
Despite parental advice, here's a good reason to sit in in a dark room and think small. This Plasma Storm isn't as large as a standard plasma ball, so not only is it much more affordable -- the effect is concentrated and startling. The black plastic base has a switch. Turn it on at which point the 3" dia plastic globe (think baseball size) is filled with blue stems that flare to pink, looking like dozens of electric flowers searching for a way out. Very cool. Comes with a 6-ft power cord with transformer.
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92222 PLASMA STORM |
Absolutely magnificent magnet!! Very strong - we estimate it has a 35 lb. pull - neodymium-iron-boron (rare earth) that is only about 3/4” x 1-1/8” x 7/16” thick. It is actually trapezoidal, so the 1-1/8” dimension slants from 1” to 1-1/4”. They are pretty clean take-outs, painted silver, white or black, and may have some very small chips. Be careful!! These guys will murder a computer or audio/video tape. A pair will leap into a deadly embrace from over 6” apart and may knock chips off themselves from the force of their impact!! A single magnet holds (4) of our catalogs (11 oz, 5/16” thick) to the side of a steel file cabinet. We cannot say too much in favor of this magnet!!
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21716 WONDER MAGNET |
'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 |
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