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The Vent-Miser
Do you dream of being an HVAC wizard? Of actually closing vents in sporadically used rooms to save heating and air conditioning dollars? Well, who doesn’t? It’s not only possible but more probable with this programmable, motorized louver cover for a heat duct. Meet the Vent-Miser™. It runs on a pair of “AAA” batteries (not included—most wizards have their own) and is programmable for (2) weekday and (2) weekend open/close cycles. Also has a manual control, low-battery icon and audible alarm. You pick from 4” x 10” ID (5-1/2” x 11-1/2” OD) in medium brown or white steel, or 4” x 12” ID (5-1/2” OD x 13-1/2” OD) in white steel. Mounting screws included.
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40872 10” VENT-MISER MOTORIZED VENT COVER, BROWN | |
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40873 10” VENT-MISER MOTORIZED VENT COVER, WHITE | |
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40874 12” VENT-MISER MOTORIZED VENT COVER, WHITE |
Rectify What?
This is for the person who wants to convert AC voltage to the equal DC voltage. It is 1-1/8" square x 7/16" thick, with (4) lug terminals. It is rated at 600 volts and 35 amps max.
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33569 BRIDGE RECTIFIER |
Power Locks
We thought power corrupts, but it turns out otherwise. Power locks. You could put these in a car door, or think up something really kinetically clever. These brand new 12VDC door lock actuator assemblies draw 2.6A pushing or pulling with a 5/8" throw. Measure 4-5/8" long x 2-1/4" at the solenoid x 1-3/16" thick. Top is a removable plastic ring. Comes with 6-3/4" x 5/8" steel mounting bracket, a 9" rod and assorted screws.
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93964 POWER DOOR LOCK |
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 |
RF Microwave Meter
Evaluate the RF emissions of mobile phone, radio and TV transmission towers, wireless camera, Wi-Fi and LAN detection and installation, microwave oven leakage, and other environmental safety concerns.This handheld instrument from Sper Scientific® measures radio frequency (electromagnetic frequencies above audio range and below infrared light) including oven microwaves at 2.45GHz and other RFs between 50MHz and 3.5GHz. Readout is in a 1-5/8" x 1-1/4" LCD and the measurement is between .003 - 3.999mW with .001mW resolution. Comes with a 9V battery and carrying pouch and is 5-1/4" x 2-1/4" x 1-1/4" overall. Don't stand in the kitchen without it.
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94163 MICROWAVE METER |
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 |
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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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Ten Roentgens & Counting…
If Madame Curie had owned this, she'd be alive today. (She'd be more than 140 years old, of course, but still….) Our Radex RD1503 digital radiation meter measures in uSieverts/hour and uRoentgens/hour in (3) different ranges each. Indicates the number of cycles of observation and has an audible mode as well as a 1-3/4" x 1-1/8" LCD. The unit measures 4" x 2-1/4" x 1" and comes with a detailed manual and technical certificate. Made in Russia.
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93647 RADIATION METER |
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Relay Twofers
12VDC relays are on special this week. The 1A special is a 2-pack of little lower-power relays from Kest Manufacturing. Each measures 13/16" x 3/8" x 7/16". Load contacts are rated for 125VAC 1A or 30VDC 2A. Dual sets of NO/NC contacts. Pin-out diagram on the bottom of the housing. UL. The 10A from Omron has both NO and NC contacts and is rated for up to 10A at 250VAC. Its 12V coil gets power at pins 2 & 5; pin 1 is the common; and pins 3 & 5 are NO and NC respectively. Measures 7/8" x 5/8" x 11/16" high. UL/CSA.
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40804 12VDC 10A RELAY | |
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94217 12VDC 1A RELAY |
Be A Meter Reader
And save a bundle. The "Kill-A-Watt" plugs into a wall outlet and accepts the power line for any devices or appliances that draw up to 1875 watts. Identifies energy eaters, tracks efficiency and costs over time, and checks on your electricity provider by monitoring voltage, current (amps), watts, kilowatt hours, frequency (Hz), volt amps, power factor, and elapsed time. Measures 5-1/8" x 2-3/8" x 1-7/16" with a 1-3/4" x 11/16" LCD screen. You may never use a waffle iron again.
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93575 KILL-A-WATT |
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 |
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