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ROCKS AND MINERAL COLLECTION SET (0675)
A quality collection of various rocks and mineral. nicely packed. Each specimen properly labeled and numbered.
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METALS COLLECTION SET (0676)
A collection of 12 different types of metals mounted in a tray with glass front. All specimens properly labeled and numbered.
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FOSSILS COLLECTION SET (0677)
A collection of fossils and fossil casts selected for schools students. Each specimen properly labeled and numbered. Supplied in a partitioned wooden case. The set contains
A. Plantae, Pteridosperm, Carboniferous
B. Mollusca, Lamellibranch, Recent
C. Mollusca, Gastropod, Tertiary
O. Mollusca, Ammonite, Jurassic
H. Mollusca, Belemnite, Jurassic
I. Brachipoda,Brachiopod, Jurassic
J. Coelenterata, Coral, Carboniferous
K. Coelenterata, Graptolite, Ordovician
L. Echinodermata, Crinoid, Carboniferous
M. Echinodermata, Echinoid, Jurassic
N. Arthropoda, Trilobite, Silurian
O. Vertebrata, Shark's Tooth, Miocene
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SOLAR SYSTEM MODEL (The Orbit Orrery) (0678)
For demonstrating the overall shape of solar system, and the main movements of the planets. The apparatus has all the nine planets of Solar System from Mercury to Pluto on revolving arms with the biggest sphere representing sun positioned at the center. The planets are relative to their size as they appear in the solar system, but not to scale.
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'HELlOS' PLANETARIUM (0679)
A working model of the planetary system, which combined with a 'Star dome' makes an efficient, graphic and versatile aid for teaching basic astronomy. It comprises a circular base with a series of concentric rings for the model planets which revolve around the central Sun at their 'HELlOS' PLANETARIUM correct relative speeds, the Moon revolving around the Earth. Around the upper edge of the base is a calendar and a degree scale for setting the planetary positions. In addition, a zodiacal calendar is provided. The planets from Mercury to Saturn, can be positioned for any year and month by means of the degree scale on the rim of the base. The star domes [the one from the northern hemisphere is supplied with the planetarium] illustrate the position of stars and constellations, lines of right ascension and declination, the ecliptic and celestial equator. Supplied with teaching manual covering history, the Sun, planets, comets and space exploration as well as useful tips for demonstration. Complete with all accessories, and a 240V mains power unit, fitted with double insulation and thermal cut-out for overload protection, but without batteries.
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ELEMENTARY PLANETARIUM (0680)
A durable, economical, simplified, hand-operated model that demonstrates the orbital relationship of movement of Sun, Earth and Moon throughout the year and shows solar, lunar and annular eclipses, moon phases, and seasons etc. The sun sphere is lighted with the beam always pointed towards the Earth to show moon shadow and display twilight zones on the earth sphere. A chain drive keeps the North-pole pointed towards the Polaris.
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TELLERIUM (0681)
A high quality tellurium designed to demonstrate on a large scale the relative movements of the Sun. Earth and Moon, so as to understand the causes of a number pf phenomena such as day and night. changing length and direction of shadows. seasons of the year, phases of the Moon, eclipses of the Sun and Moon. Hand operated with belt drive.
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PHYSICAL RELIEF GLOBE (0682)
A twelve inches raised relief globe combined with political features, makes it useful for showing the effects vis-a-vis natural geographical boundaries. Contains realistic portrayal of the Earth's surface with colouring depicting natural vegetation, including areas, where the natural environment has given way to man's cultivation and urbanization. The physical relief details are clearly printed. Mounted on pivots in half-meridian frame on a stable base.
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PHYSICAL / POLITICAL GLOBE (0683)
The physical details of the world are clearly visible, but on switching ON the light, the political details become visible. The bulb is easily replaceable. Mounted on pivots in half-meridian frame on a stable base.
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SOLAR SYSTEM MODEL, SIMPLE (0684)
A simple and economical model for demonstrating the overall solar system. and the movement of the planets. Similar to PHYSICAL / POLITICAL GLOBE but smaller in size and mounted on wooden base. The central globe depicting sun has a small bulb inside with wires coming out from the base and terminating in a cell-holder to power the bulb. The apparatus has all the nine planets of Solar System from Mercury to Pluto on revolving arms made of metal wire, with the biggest sphere representing sun positioned at the center. The planets are relative to their position as they appear in the solar system, but their sizes not to scale.
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RADIANT HEAT SOURCE, MAINS OPERATED (0685)
A ruggedly designed unit that provides and alternative to the open element type cylindrical radiant heat source commonly used. Designed specially for safety of the user, it provides high degree of safety as compared to the other one and provides effective operational use in the experiments. The unit incorporates a fully enclosed steel case, which is earthed via the mains lead and also includes an input socket for the mains lead along with indicator type ON/OFF switch. The complete unit is mounted on a broad insulated base-board with nonskid rubber feet to avoid its accidentally tipping off. The heated radiant surface has a grille at the front to prevent its accidental contact with any other object or with the user. Provided with a handle at the rear for convenience in carrying, Its special unidirectional design minimizes heat radiation in undesirable directions and provides output in the required direction only. Operates on 220-240V AC, 50/60Hz, unit rated at 300W. Supplied complete with detachable 3-core mains lead.
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FUNCTION GENERATOR - AMPLIFIER - FREQUENCY COUNTER (0686)
A reasonably priced, feature rich apparatus incorporating three functions into a single instrument with 4 digit, 7 segment LED display. Its simple and well organized operating panel makes it well suited for demonstration experiments by the teachers as well as for use by the students for experiments in vibrations, waves and much more. Function Generator: Provides three type of output waveforms - sine, square and triangular with a broad continuous frequency range of 0.1Hz to 100kHz with output impedance of 600Ω and maximum output amplitude (Vpp) of 20V (peak-to-peak). Also provided with digital fine tuning of both frequency as well as amplitude with frequency readout available on the digital display. The BNC output signal connection is short circuit protected. Also allows the demonstration of frequency modulation by connecting an external signal.
DC Amplifier: Also incorporated is a 10W amplifier, short circuit protected, and has a frequency range from 0-50kHz with maximum input of ?50V it can also be used to. amplify signals from the function generator or from external sources. The input of external signals is by means of a BNC connector with an impedance of 10kΩ and the output signal is accessible through safety-type 4mm colour coded shrouded banana jack connectors, Frequency Counter: Provides a fully automatic measurement of external frequencies from 0.1Hz to 150kHz, which can be read directly from the 4digit digital display. The apparatus operates on 220-240V AC, 50Hz. Supplied complete with detachable 3-core mains lead and user instruction manual.
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MICROWAVE OPTICS KIT (0687)
Comprises a 2. Bcm transmitter and receiver and incorporates following features. ? Wave optics in centimeter range ? Demonstrates the properties of electromagnetic waves ? Allows easy demonstration of Interference and Diffraction ? Designed and tested as per EN300-440, and compliant to EN50371 The equipment has been specially designed and developed to demonstrate the various properties of electromagnetic waves, to study the associated phenomena and as an aid to teach the behviour of visible light. The use of microwave permits more comprehensive range of experiments relating to electromagnetic waves, over a wider spectrum of frequencies.
Technical Specifications
Transmitter:
Mode : CW or external modulated, Frequency : 10. 5GHz (Compatible with many existing systems), Average Power : 15mW, Supply Voltage : 5V DC (through external AC mains adaptor unit included)
Receiver:
Mode : CW or Modulated Signal, Frequency : 10. 5GHz (Compatible with many existing systems), Antenna Gain : 17dB
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WHEATSTONE BRIDGE, SLIDE WIRE FORM (0688)
For determination of unknown resistances or comparison of resistances. This bridge has broad, heavily plated metal strips mounted on a sturdy anodized aluminium channel section base. Terminals with 4mm sockets are provided to reduce unwanted resistance to a minimum and the gaps are closed by removable plated brass strips, which are held in position by the terminals. The 24SWG bare constantan wire is stretched along the top of a meter scale graduated in millimeters and figured every centimeter. The ends of the wire are securely clamped to the terminating strips to reduce end errors to the negligible level. Features a double-end slider type knife edge for quick, easy and accurate determination of null point. Wire easily replaceable if damaged or broken.
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STROBOSCOPE, DIGITAL (0689)
A microprocessor controlled, lightweight stroboscope featuring xenon lamp and permits wide range of flashing rates [or frequency). Ideal for operation at low frequencies for strobe photographic experiments such as in precise experiments and at high frequencies for observation and measurement of rapidly varying periodic motions. The 4-digit LED digital readout permits accurate frequency measurements. The complete stroboscope is housed in impact resistant moulded plastic case with plastic mirror type reflector at the front. Provided with coarse and fine frequency control through respective knobs, power ON/OFF switch, range [Low/High) select switch at the rear. Includes detachable power cord. Specifications :: Display : 10mm, 4-digit, 7 segment bright red LED display , Flash rate : 100 to 10,000 flashes per minute (FPM), Accuracy : ? (0.05% + 1 digit), Resolution : 0.1 FPM/RPM (<1,000 FPM/RPM) 1 FPM/RPM (1,000 - 9,999 FPM/RPM) 10FPM/RPM (>10,000 FPM/RPM),
Sampling Time : 1 second, Calibration : Crystal time base and microprocessor circuit, Flash Tube : Xenon Lamp, Flash Duration : Approx. 60 to 1000?s, Flash Colour : Xenon White 6500?K, Flash Energy : 4 Joules, Beam Angle : 80?, Operating Duty Cycle : 30 minutes < 3000 FPM / RPM 5 minutes (> 3000 FPM / RPM), Power Supply : 220V AC ? 10%, 50/60Hz, Power Consumption : < 30W, Operating Condition : 0-50'C, up to 80% RH
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