Waves, sound and light • 33
2515.50
Microphone probe A miniature microphone is mounted at the end of a 740 mm long 8 mm diameter stainless steel probe for measurement of sound pressure levels in locations which are hard to access. The frequency range is 20 to 20,000 Hz. The probe is intended for use with 2480.10 resonance tube. The probe is supplied with a 2 metre cable with a DIN con- nector. Note: The microphone is powered by an external voltage. This can be provided by our 2515.60 power supply / battery box or by data logging equipment. In order to use the microphone with a multimeter or an oscil- loscope the 2515.60 power supply is required.
2515.50 Microphone probe
Kundt’s resonance tube
This apparatus is designed for demonstration of standing waves and for determination of the wavelengths of sound waves in air. The tube is supplied with a millimetre scale and a moveable piston for changing the length of the air column. (You will also need an external sound source - e.g. 2240.10 Tuning fork 1000 Hz, together with 2245.61 Striking hammer.) Dimensions: 66 cm x Ø 3 cm.
2475.00 Kundt’s resonance tube
2475.00
Power supply - battery box
The power supply is designed for use with microphones and other sensors that require + 5 V DC to operate. (It also makes it possible to use certain combinations of new and old equipment like photo gates and timers – for details, refer to the manual available online.) The unit is provided with a battery compartment for 9 V alkali- ne battery type 6LR61 (3510.10) which via an electronic regula- tor supplies the +5 V DC supply voltage for connected probes. The unit has two inputs with 6 pole, 240° DIN connectors and one input with an 8 pole, 270° DIN connector that also accepts a 5 pole, 180° DIN plug. The output terminals comprise two 5 pole, 180° DIN connec-
tors and a set of 4 mm safety connectors. Dimensions (L x W x H): 14.3 x 8.4 x 3.7 cm.
2515.60 Power supply
Passion for Science
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