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General Science


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Portable Black Light

A 6" hand held black light fixture with flashlight. Works with 4 AA batteries not included. Excellent for prospecting, checking hand stamps, finding pet stains, checking for bacteria, applying black light sensitive cosmetics, collecting insects, searching for antique glass, reading secret messages and our personal favorite... hunting for scorpions at night in the desert are just a few of the uses we've heard about. Very popular!

- Ready to Use ... $9.95

Home Weather Station
The weather forecast was made yesterday - now here comes Wiz Kid. Elegant design, innovative sensor technology, and the weather forecast presented by Wiz Kid the weatherman - these are just a few of the features of the new radio weather station.

The attractively designed weather station can be completely set up and ready to use in just minutes. It displays not only the weather data but also calculates the weather forecast for your immediate area and registers wind speeds as well as rainfall. It also provides you with other interesting information, such as the current phase of the moon, sunrise and sunset times, weather trends, room climate and more.

To find out quickly what the weather is going to be like, all you have to do is take a look at what kind of clothes Wiz Kid is wearing. Whether swim suit or scarf and umbrella, the Wiz Kid has over 50 variations for dressing appropriately for the weather just outside your door. As soon as it begins to rain and the sensor detects it, the Wiz Kid informs you by appearing with an opened umbrella - you don't even have to look outside to know. The large well-organised LCD, super flat and housed in the elegant silver-blue base station, shows you all of the important weather data in graphic and numeric formats when in normal mode. Other functions are easily accessed using only five buttons.

Greatly contributing to the accuracy of the weather data is the new E9301 radio combi-sensor. It is fitted onto a mast that can be placed in the ground and works similarly to professional devices used in industrial applications. For example the outdoor temperature is measured in the same way as professional meteorologists: 6 feet above ground and shielded from sunlight.

In addition, the combi-sensor can be set up any place up to a distance of 300 ft. from the base station without having to lay cables or drill holes. Up to 8 additional locations can be used to place the E9305 sensors to measure the temperature and relative humidity and have the data sent wirelessly via radio to the weather station using low disturbance 433 MHz technology.

  • Radio transmission: 433 MHz radio transmission linking all sensors
  • Temperature: Up to 9 sensors can be connected, two temperature values are shown concurrently, 1 indoor and 1 selectable outdoor temperature, resolution 0.18 °F, accuracy ±1.8 °F; display unit: T, dew point (indoors) and windchill display (indoors/outdoors), comfort zone indicator for indoor display
  • Relative humidity: Up to 9 sensors can be connected, two humidity values are shown concurrently, resolution 1%, accuracy ±5 %
  • Air pressure trend: Display using five arrows (rising, rising steeply, dropping, steeply dropping, no change)
  • Air pressure history: Display using bar chart, up to 24-hour tracking
  • Rainfall: Range 0 to 999 mm, display total since last reset, last 24 hrs. or 1 hr., display in mm, l/m2, resolution < 0.3 mm
  • Wind speed: Display selectable as km/hr., m/hr. or m/s, resolution 0.06 m/hr., wind sock icon for light, moderate and strong wind
  • Sunrise and sunset: Selectable display of individual locations
  • Moon phase: Display of the current moon phase in four stages
  • Time & date: Quartz clock
  • Weather forecast: With weather icons: sunny, fair, cloudy, rainy, and Wiz Kid's choice of clothing
  • Extensive memory options: Min./max. values with time & date
  • Independent of house curent: Base station, 4x AA batteries;
  • Battery operated: (2 x AA) for use in dark and low-light locations
  • Temperature: Measurement range: -4 to +176 °F Resolution: 0.18 °F - Accuracy: ±1.8 °F
  • Humidity: Range: 20.0 to 99.9 % RH, Resolution: 0.1 % RH, Accuracy: ±8 %
- Ready to Use ... $249.95

Newtonian Demonstrator

The classic Newtonian demonstrator is designed with the utmost in Sturdiness and appearance. The wooden frame is 9" X 7" X 8" and can be seen from the back of a classroom. Five nickel plated steel balls of uniform mass are suspended from the frame. The item comes fully assembled and includes instuctions with the theory explained.

- Newtonian Demonstrator ... $29.95

Gyroscope

Explore the mysteries of inertial guidance, compasses and stabilization. Runs up to 3 minutes with little wobble because it's precision machined. Dynamically balanced 6 cm steel rotor, near-frictionless Teflon stay bearings. The gimbal cradle with cone bearings pivots to hold the spinning gyroscope in place. Includes: plastic base, molded rocker with gimbal, pull cord & handle, weights, hook, instructions.

- Newtonian Demonstrator ... $49.95

Gyroscope Kit Demonstration

To demonstrate and teach the principle of a Gyroscope. All metal construction except for plastic bases. Consists of 2 plastic bases, 4" diameter, one flat and other with a rocker, to experiment on, as to what happens when the base is moving. The Gyroscope is mounted in a metal ring 3-&frac12" dia, Gyroscope wheel 2-¼" dia. Comes complete with spinning cord. Total height 7.5".

- Newtonian Demonstrator ... $23.50

Crook's Radiometer

Invented by William Crooke in the 1860s, this device demonstrates the conversion of light energy into mechanical energy. The vanes in the evacuated glass bulb are Black and White in color. The dark vanes absorb the rays and the light vanes reflect the rays. This is a great way to study how light energy is converted into mechanical energy. The stronger the light, the faster it spins. It measures approximately 5" by 3".

- Radiometer ... $16.95

Leyden Jar
static electricity,electrostatics,van de Graaff,generators,wimshurst,leyden,jars,electroscopes

Charge it, dissect it - holds a charge for hours. Prove that a charge is stored in the dielectric insulator, not in the metal surfaces. Includes: 2 aluminum cans, polystyrene dielectric, electrode with ball terminal, instructions with lab activities. Wt: 9 oz.

- Classic Leyden Jar Cap ... $29.95

Electroscope
static electricity,electrostatics,van de Graaff,generators,wimshurst,leyden,jars,electroscopes

Show how two similarly charged objects repel! This classic device features a molded plastic case with removable glass sides and a 10 cm square viewing area. Aluminum leaves hang from brass hooks for maximum sensitivity. Includes: 2 pair die-cut leaves; brass hanger; 2 glass panels, 10x 10cm; ball terminal; insulator; instructions. Wt: 10 oz.

- Electroscope ... $29.95

CONCAVE MIRROR
concave mirror Glass, optically worked. Back silvered with protective coating. 100mm Diameter x 250mm Focal Length.

Demonstrate the suns power by projecting a burning beam of light energy.

- Concave Mirror ... $4.80

CONVEX MIRROR
concave mirror Glass, optically worked. Back silvered with protective coating. 100mm Diameter x 250mm Focal Length.

Demonstrate the suns power by projecting a burning beam of light energy.

- Convex Mirror ... $4.80

PRISMS
concave mirror

Prism Set of 3: 25mm, 50mm, 100mm

Prisms Optically Polished, Equilateral Set of 3, 1 each of:
25mm Long x 25mm Side
50mm Long x 25mm Side
100mm Long x 25mm Side

- Prism Set of 3 ... $14.50

PRISM, RIGHT ANGLE
concave mirror Glass, large size 50mm (approx.) size of face. Polished faces.
- Prism Right Angle ... $5.80

Acrylic Refraction Cube

Perfect for Index of Refraction and Total Internal Reflection experiments.

The bending of light as it passes from one substance to another is called refraction. Refraction causes the familiar mirage as we appear to see a nonexistent pool of water on a distant road on a very hot day. The ray of light can be totally reflected back inside the cube, leading to total internal reflection, not refraction.

These and other phenomena can be studied with our Refraction Cube. The index of refraction is about 1.5, meaning that the light travels 50% faster in air than it does upon entering the acrylic plastic. Faces are 5 cm square, instructions included.

- Acrylic Refraction Cube ... $19.95

Tuning Fork, High-Quality, Set of 8

Chromium plated steel (specially meant for vibration), plain shank, with frequencies marked. Conical pointed end for accurate and complete transfer of vibration to the experiment base. The frequencies are electronically tested. Packed in set of 8. One each of C-256, D-288, E-320, F-341.3, G-384, A-426.6, B-480, C-512. NOTE: Steel Tuning Forks are better than Aluminum Tuning Forks, because they Vibrate longer due to their heavier mass, thereby helping in experiment time.

- Tuning Fork, High-Quality, Set of 8 ... $42.50

Tuning Fork, Set of 8

Steel N.P. Tuning Forks set of 8, with long handle for convenient handling. Frequency engraved on handle. Packed in thermocole box for storage. 1 each of, C-256, D-288, E-320, F-341.3, G-384, A-426.6, B-480, C-512. NOTE: Steel Tuning Forks are better than Aluminum Tuning Forks, because they Vibrate longer due to their heavier mass, thereby helping in experiment time.

- Tuning Fork, Set of 8 ... $17.50

Magnetic Field Distortion, Sunspots & Tremor Detector


Detects Mysterious Phenomena Not Of This World.....


Head




Control Box

See the earth's magnetic field distort under the influence of solar activity. Detects moving metallic objects such as UFOs? Predicts earthquakes, power outages, communication black outs and other weird phenomena.

When used with the included biasing magnet, the device is sensitive enough to detect tapping a finger on a nearby rock!

Detect the presence of hover craft and other potential magnetic producing disturbances. This is a powerful R&D tool for studies in these fields and can be an award-winning science project.

Battery operated two part device consists of remote sense head with built in nanoamp preamplifier. Control box contains output jacks for X & Y recorder, signal meter, audible alarm and all programming controls.

Permanent installation where the weather-resistant head may be mounted on a sturdy pole away from anything electrical or large amounts of iron, preferably in a quiet place out of the wind. A shielded cable can now be run to the control box.

Permanent installations are suggested for:
   Sunspot monitoring for possible magnetic storms
   "Unidentified flying objects"
   Warning of pending earthquakes or explosive events
   Vibration detection, etc.

Temporary installations can be made by placing the head on a sturdy video tripod and placing the control box in any convenient location. This method is preferred in the evaluation of paranormal and "the unexplained" target areas.

Specifications and controls
   Zero set control pot
   Meter and overall sensitivity control pot
   Alarm threshold and deactivation control pot
   Jack for external XY recorder
   Jack for connecting cable from "detecting head" section
   Requires 2 AA batteries for head section which last indefinitely, and 8 for control box which last for months (not included)
   Dimensions of Head: 3.5" diameter x 8" long / Control box: 7.5 x 3.25 x 5.25"

- Assembled & Tested Unit ... $369.95
- Kit/Plans ... $219.95
- Paper Plans ... $10.00
- Downloadable Plans ... $4.00

Earthquake Tremor & Vibration Detector

Sensitive Enough To Detect Tapping A Finger On A Nearby Rock!!!

Very similar circuit to above MGD10 Magnetic Distortion Detector, with a bias magnet and a special method showing mounting of the detection head.

- Assembled ... $249.95
- Kit/Plans ... $199.50
- Paper Plans ... $10.00
- Downloadable Plans ... $4.00

INDUCTION HEATER
Induction Heater
  • Heats Through Glass Tubing Without Contact, Cleaning And Outgassing Electrode
  • Two Parts Construction Consists Of Donut-Shaped Head That Fits Over Electrode
  • Head Is Easily Replaced For Cooling Purposes When Doing Volume Work
  • Compact 4 x 5 x 2" With 3-Wire Line Cord
  • Operates From 115/220VAC

IND50 Instructions

- Induction Heater - Ready to Use ... $179.95
- Paper Plans ... $10.00
- Downloadable Plans ... $4.00

Sound Activated Switch

Neat circuit controls devices by sound - many uses.

- Sound Switch Module ... $9.95

Thunderstorm Activity Monitor

thu1.gif - 0.92 K Plans for monitoring short pulse "spherics" electromagnetic energy occurring from lightning discharges. Device is a real asset in severe storm level areas (tornado country) by indicating dangerous levels of electrical activity. Provides early warning.

- Paper Plans to Early Warning System ... $5.00
- Downloadable Plans ... $2.00

Kirlian Photography

Explore the amazing and mysterious phenomena where many objects produce a glowing electrical "AURA". Operates from 115VAC or batteries.

- Paper Plans ... $10.00
- Downloadable Plans ... $4.00

High Frequency High Voltage Corona Power Supply For Kirlian Experiments

- Paper Plans ... $34.95

Optional 14 Volt Grounded Wall Adapter

- Paper Plans ... $19.95

Electric Motor Kit

toymotloop.gif - 10124 Bytes Easy to build motor performs at high speeds. Great conversation piece or science project. Operates on 3 to 6 volts. All parts included.

- Kit/Plans ... $6.95

Dynamo Generator AC/DC

To generate AC (alternating current) and or DC (direct current). On turning the wheel current starts to generate, on flipping the switch to ac or dc the corresponding bulb lights up. Open construction and all the parts are easily visible.

- Kit/Plans ... $32.50

High Power Electro Magnets

elmag10.gif - 6.85 K Electro Magnets Amazing Device Lifts 700 Pounds Yet Operates From 2 "D" Size Batteries! Magnet weighs only 4 pounds.

ELMAG20 Instructions and Applications booklet.

- Lifts Over 700 lbs - Ready to Use ... $79.95

Rare Earth Magnets
rare earth magnets

Magnet Magnet Magnet
Magnet Magnet Magnet Magnet
Magnet Magnet Magnet Magnet

Rare earth magnets are the strongest type of permanent magnet currently made. They are amazingly powerful for their size and have innumerable uses. The permanent magnets system are composed of licensed grade 40 neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant finish.

Rare Earth Magnet Composition
Rare earth magnets are magnets composed of alloys of the Lanthanide group of elements. The two Lanthanide elements most prevalent in the production of permanent magnets are Neodymium and Samarium. There are numerous alloy formulations of rare earth magnets covered under many different patents but the most common commercial varieties are Neodymium-Iron-Boron (NdFeB) and Samarium Cobalt (SmCo). Neodymium-Iron-Boron magnets are the most advanced commercialized permanent magnet material available today.

Rare earth magnets are available in sintered and bonded forms. Sintered magnets are a type of ceramic composed of the compressed powder of the alloy material being used. Sintering involves the compaction of fine alloy powder in a die and then fusing the powder into a solid material with heat. While the sintered magnets are solid, their physical properties are more similar to a ceramic and are easily broken and chipped - so handle them carefully, especially near metal or other magnets where they want to snap closed quickly. (Bonded magnets use a polymer base to hold the alloy powder together. The energy product of bonded magnets is much lower than that of the sintered magnets.) Sintered NdFeB magnets are generally plated or coated with a material to prevent corrosion. There are various coatings available. Nickel-Copper-Nickel plating has excellent corrosion resistance and durability as well as providing an clean and shiny appearance. All of our stock rare earth magnets are sintered Neodymium-Iron-Boron magnets plated in Nickel-Copper-Nickel.

Magnet Grades
These magnets are all Grade 40; the grade directly refers to the Maximum Energy Product of the material that composes the magnet. It in no way refers to the physical properties of the magnet. Simplistically, grade is generally used to describe how "strong" a permanent magnet material is. The energy product is specified in the units Gauss Oersted. One MGOe is 1,000,000 Gauss Oersted. A grade forty (N40) would have a Maximum Energy Product of 40 MGOe. The higher the grade the "stronger" the magnet.
Magnet

MAGNETIC STRENGTH and POLARITY METER

A valuable tool for the researcher or experimenter in magnetism

Magnet Handy low-cost meter measures from < 1 up to 10 gauss for full scale reading. Allows you to check polarity and obtain relative field strength readings. Checks magnetic pulsers, normal fixed magnets, and potential fields in a magnetically active area.

Device measures 2-¼" diameter at outer lip (2" diameter base) x 1-1/8" deep. Weight is 1.4 ounces. Polarity indicator noted on rear of the unit. Center scale calibrated allows you to quickly determine strength and direction of polarity.

Does not require batteries and is ready to use.

- Magnetic Strength and Polarity Meter ... $41.50

Scientific Plans
Vacuum Pump
No moving parts yet produces pressures down to several torrs.
- Paper Plans ... $10.00
- Downloadable Plans ... $2.00
High Vacuum System
Achieves pressures down to .01 micron for lasers, plasma studies, particle accelerators etc.
- Paper Plans ... $10.00
- Downloadable Plans ... $4.00
How To Construct Parabolic Dishes
For solar, satellite, radio, heat or sound.
- Paper Plans ... $10.00
High Altitude Solid Fuel Rocket
and electronic payload.
- Paper Plans ... $10.00
- Downloadable Plans ... $4.00
Portable X-Ray Machine
Simple approach to building a home made x-ray machine. View the inside of sealed assemblies. Useful in many experiments - not a toy or for minors - Radiation hazard.
- Paper Plans ... $10.00
- Downloadable Plans ... $4.00
Build Your Own Giant Electromagnet
Powerful enough to lift a car!
- Paper Plans ... $10.00
- Downloadable Plans ... $4.00