Breckland Scientific 2023 Catalogue

Sound & StandingWaves

Sound

a

3 STROBOSCOPE- HANDHELD A hand-held stroboscope, consisting of a circular black disc, with radial slots extending to the edge of the disc. Mounted on a handle, the turning point of the disc has a ball bearing mount, to minimise friction. Cat No. Description Price Per SWA-650-100 Stroboscope - Handheld 11.91 ea. 4 STROBOSCOPE- XENON This digital stroboscope uses a Xenon lamp to emit intense bursts of light, which can be synchronized with the speed of a target object, making it appear to be stationary or moving slowly. This procedure allows calculation of the speed or frequency of an object that has an unknown speed of oscillation or rotational velocity. The unit features a rotating encoder to facilitate rapid frequency modulation and incorporates an internal microcontroller as the processing unit, along with a built-in display chip which drives the 7-segment LED to present real-time flashing frequency data. Typical uses include viewing standing waves in string or rubber cord, viewing oscillations of a pendulum or mass on a spring and calibrating revolutions of a device such as a motor. Operation is simple, and the stroboscope is supplied with instructions for use. 1 LASCELLS SPEED OF SOUND This is an easy to use piece of apparatus for determining the speed of sound in air. The unit contains two sensitive microphones connected to control circuity that will start and stop a millisecond timer. Alternatively the outputs may be monitored on a storage or PC oscilloscope. In use a sharp sound is produced in line with the two microphones, the time recorded is then the time taken for the sound to travel between the two microphones. Supplied with a 9V PP3 battery, a 6 metre connecting cable and full instructions. Cat No. Description Price Per SWA-715-100 Speed of Sound 89.94 ea. 2 LASCELLS ULTRASONIC SYSTEM This apparatus consists of a transmitter and receiver operating in the 40 kHz region. The transmitted wave is modulated at a user controlled variable frequency of about 2kHz - this is detected by the receiver which amplifies the signal and drives a miniature integral loudspeaker. Both transmitter and receiver are contained in robust plastic enclosures, which house all the electronics and 9V batteries. The receiver has front panel 4mm sockets so that the output can be monitored on an oscilloscope for more quantitative measurements. The system is ideal for demonstrating sound waves above the hearing threshold and reflection properties associated with sonar etc. A special feature is the second transducer on the transmitter, which can be switched in when required to produce two coherent sources. By moving the receiver along a line parallel to the two sources interference patterns can be dramatically demonstrated, simplifying the Young’s slits experiment or enabling it to be demonstrated using waves other than light. Complete with batteries, full instructions and suggestions for use. Cat No. Description Price Per SWA-745-100 Ultrasonic System 189.81 ea.

1

b

c

d

e

f

g

Lascells Speed of Sound

2

h

i

j

Lascells Ultrasonic System

k

Stroboscopes

l

3

m

n

o

Stroboscope - Handheld

p

4

q

r

• Triggering Frequency Scope: 0.2 to 300 Hz (internal & external) • Recommended Triggering Frequency: 0.2 to180 Hz • RPM: 60 to 18,000 • Flash tube intensity: approximately 10000 lux • External Triggering signal Scope: 5~12V pulse signal • Power Consumption: 8Wmax. • Power supply: AC220V ± 5%, 1.2A • Overall dimensions: 215 × 140 × 150mm (l x w x h) Cat No. Description

s

t

v

Price Per

SWA-670-100 Stroboscope - Xenon

330.40 ea.

Stroboscope - Xenon

w

409

www.brecklandscientific.co.uk T: 01785 227227 | sales@brec landscientific.co.uk | F: 01785 227444