Products

Our set of 8 precision tuned tubes has earned the Parent's Choice award. Bang the tube on a knee or floor to hear a note from the C major diatonic scale. You can actually play music this way, selecting longer tubes for lower notes. Made of soft, colorful plastic, each tube is labeled.

Cylindrical Spectroscope

Metal teaching spectroscope. Great colors are produced by superior optics and highly accurate diffraction grating. View the spectral diffractions of various light sources and excited gasses. Includes focusing adjuster. 100mm long by 25mm diameter.

Dynamic Microphone

Unidirectional microphone, features include: 9 foot cord, 1/4? (6.3mm) adaptor, 1/8? (3.5mm) adaptor and on-off switch.

Electric Bell

All parts clearly visible, works on 3-4V D.C. Fitted on a wooden base.

Electric Tuning Fork

A heavy steel fork of about 60 vibrations per second is mounted on a heavy cast iron base. The electromagnet is adjustable so that the amplitude of vibration may be varied between wide limits. Complete with mirror for Lissajou?s figures experiments.

Kundt'S Apparatus

Compare the ratio of the velocity of sound in brass to that in air. With our device, this elegant nineteenth century experiment is easy to perform today. Rub a brass tube (36 x 8 x 5") until it vibrates and watch the powder inside accumulate at nodal points. Measure the spacing between nodal points and compare with the length of the brass rod. Includes instructions. You need lycopodium or other fine powder.

Oscilloscope

This versatile instrument is an asset to any lab and includes its own AC power cord, spare fuse, instruction manual and two probes. Operates at 20 MHz bandwidth. +ADw-br+AD4- Displays two traces in chop or alternate modes+ADs- sensitive to 1 mV with 10 range vertical amplifier+ADs- can be used in single- and dual-trace modes+ADs- 12 calibrated deflection steps+ADs- rotate the trace with front-panel control+ADs- 1 kHz square wave internal calibration source+ADs- sharp-focus CRT is parallax free+ADs- external trigger capable +ADw-br+AD4- Specifications: +ADw-br+AD4- Vertical Amplifier: Sensitive to 5 mV, 10 steps adjustable+ADs- accuracy: 3 +ACU- accuracy+ADs- impedance: 1 Megaohm, 35 pF+ADs- max input voltage: 400 V+ADs- frequency response: 5 mV - 5 V/span: DC to 30 MHz+ADs- 1 mV/span (uncalibrated): DC to 10 MHz. +ADw-br+AD4- Horizontal Amplifier: Sensitive to 5 mV, 10 steps, adjustable between steps+ADs- accuracy: Y axis, 3+ACUAOw- X-axis, 6+ACU-.

ound Level Meter, Analog

Meets decibel frequency weighting A (dbA) ANSI specifications.
Measure the typical noises of the classroom, from normal speech to nearly unbearable hallway traffic, with this versatile meter. Our dial switch detects sound on two separate ranges (35 - 80 dB and 75 - 120 dB). Signal oscillator calibration is manually adjustable. Includes: carry case and instructions. 16 x 6.5 x 4 cm in size.

Pair Of Tuning Forks

A pair of tuning forks mounted on inspanidual resonance boxes, with one fork fitted with sliding mass to demonstrate beats. Changing the position of the boxes and the slider mass allow different frequencies and beats to be heard. Complete with hammer.

Pinhole Viewer

With this device, students learn how the intensity of light and differently shaped lenses affect what the eye actually sees. Grades 3-9.

Powell?s Wave Machine

For demonstrating the movement of progressive transverse waves. Comprising 22 small bails on wire rods, with eccentric motion attachment, driving handle and fitted on polished wooden base.

Quincke'S Interference Tube

Now you hear it, now you don't. Show how two sounds cancel each other out when added together. Two Y-shaped glass tubes are connected with rubber tubing in such a way that one path is about one-half wavelength longer than the other. When a tuning fork is held near one end and the path difference is about 65 cm, you'll hear no sound at the other end. When either tube is pinched shut, however, the tuning fork comes through loud and clear. With instructions. You need 256 or 512 Hz tuning fork, not included.

Resonance Apparatus with Stand

Investigate the length, frequency and velocity of sound waves by studying the resonance of air columns. We attach a movable container to a 80 cm long transparent tube that is mounted on a stand. Fill the container with water and strike a tuning fork above the top of the tube. The reverberated tuning fork becomes louder or softer depending on the location of the water. Tuning fork not included.
This item ships oversize, shipping will be calculated at checkout.

Ripple Tank with Projection Screen

Project waves onto a 10 x 9" screen for viewing from a distance. Tune the wave generation of this self-contained easy-to-use apparatus to match the stroboscopic light. We include light source, adjustable 2 and 3 prong wave generators, 2 baffles and removable 12 x 10" basin. 26" total height.

Rubber Hammer

Use this hammer to minimize damage to the tuning forks.

Sonometer

This is a great introduction to the science of sound. Have your entire class find notes and hear the difference when the length and tension of a string is altered. Includes: sonometer base, 22 cm long; two strings; tension adjusters; three bridges, (one thick and two thin); two spring scales.

Sound Level Meter, Digital

Simple enough for classroom use and precise enough for any application, this instrument yields sound measurements that are highly accurate. High resolution digital display is large and easy to read. Measures 40 to 130 dB with 2 dB accuracy. Select A or C weighting and fast or slow response time. Includes: carrying case, instructions, calibration tool, and windscreen. 230 x 57 x 44 mm in size.

Spring Helical

For demonstrating transverse and longitudinal wave motion. The spiral measures 20mm diameter x 3m closed length.

Spring Slinky

Excellent for wave demonstration experiments. A flat sectioned helical spring, diameter 75mm.

-01	Closed Length 110mm.
-02	Closed Length 165mm.

Spring, Wave Demo 20mm X 1.8M

Our stainless steel helical spring is 20 mm diameter and 1.8 m long with a constant force of 29 N/m. It can be used to demonstrate wave motion in the same way our 613-0130 wavy spring can.

Thermocouple

A simple junction of soldered wires, one each of copper and constantan 50cm long. Each wire is coiled for easy use.

Tuning Fork Block

Made of hardwood. Size 30x9x5 cm with two rows of 10 holes each for standing tuning forks. Polished and lacquered. (Without Forks)

Tuning Fork Set

Set of eight tuning forks made from aluminium alloy. Consists of C(256), D(288), E(320), F(341.3), G(384), A(426.6), B(480), C(512).

Tuning Forks

Quality tuning forks made from light weight aluminium alloy. Each marked with frequency and note. Note Frequency

-01	C 256
-02	D 288
-03	E 320
-04	F 341.3
-05	G 384
-06	A 426.6
-07	B 480
-08	C 512

Tuning Forks on Resonance Box

A set of four tuning forks, C(256), E(320), G(384), C(512), mounted on a polished wooden resonance box. Provided with a hammer.

Vibration Generator with Spring

This device produces a low frequency mechanical oscillation with a range of 0.5 to 5000 Hz. Mount springs, chladni plates or cords to learn about oscillations and resonance. 90 x 90 x 100 mm. 15 W. You need wave function generator, not included.

Wave Demonstration Set

Two helical springs:
Long spring is 3/4" x 72" and can extend 5 meters.
Large spring is 3 x 4". Extends many times its length without distortion.
3 m cotton cord to suspend large spring.
Ship weight: 2.5 lb.

Wave motion Demonstration Apparatus

For demonstrating longitudinal and transverse motions. Consisting of a number of eccentric discs supporting a series of metal rods. On revolving the handle, transverse waves are obtained. Longitudinal waves are obtained with bent rods running in a metal guide.