Ripple tank - Serrata Science Equipment

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WAVES, VIBRATIONS AND SOUND Compatible Electronic Counter This microprocessor controlled 8-digit counter is designed for the measurement time intervals, periods of oscillation, rpm, frequency and for pulse counting, etc. The unit of measure is displayed, and it is possible to divide the display into two by 4 digits. There are start/stop terminals for connecting microphones, photocell units, free fall equipment, etc. There is a connection terminal for GM counters for measuring radioactivity with selectable gate times. The counter is provided with an easily read LED display and a logically designed control panel. This makes the counter well-suited for demonstration experiments as well as for student laboratory exercises. The counter has memory for storing measured values as well as an RS232 serial output for computer interfacing. Time measurements can be made down to 1 ms, and frequencies up to 2 MHz can be measured. 2002.50 Electronic Counter 1975.50 Clapper Board This clapper board is ideal for producing the sharp sound pulse required for measuring the speed of sound. Produced with two hinged hardwood blocks. Dimensions: 27 x 50 x 300 mm. Mass: 280 g. 2482.00 Clapper Board 2482.00 Photocell Unit The unit is suitable for the measurement of pendulum periods, time interval measurements for experiments on an air track, measurements of periods of rotation, etc. The unit consists of a photocell which is illuminated via a one millimeter aperture by light from a light emitting diode. A red LED (light emitting diode) is provided next to the light source to indicate that the light source is on. A green LED near the photocell indicates when the receiver is illuminated. The photocell unit is provided with two 6-pole DIN-connectors for connection to the electronic counter no. 2002.50 and serial connection to additional photocell units, when signals are to be sent to the same input connection on the counter. The unit is manufactured in rugged plastic with threads for horizontal or vertical mounting using the 10 mm diameter mounting rod provided. A connector cable for the electronic counter is also provided. The maximum distance between the photocell and the light source is 90 mm. Dimensions: B x H x D: 160 x 120 x 28 mm. Mass: 450 g. 1975.50 Photocell Unit including cable and Mounting Rod 35
WAVES, VIBRATIONS AND SOUND Ball Bearing Track The apparatus consists of a curved track mounted on a wooden support. It is used for experiments illustrating energy exchange between potential and kinetic energy. The curvature of the track can be changed by moving the wooden supporting blocks under the ends of the track. Length of track: 495 mm. Supplied with 1 ea. 16 mm diameter steel ball. 2170.00 Ball Bearing Track 2455.00 2170.00 Organ pipe This apparatus is used to study acoustical properties. The device provides a good illustration of the relationship between frequency and the length of the pipe. The moveable piston has a scale showing tone levels. The frequency range is from 400 - 800 Hz. The device is made of wood. Length 380 mm. Mass 250 g. 2455.00 Organ pipe 2528.20 Sound level meter This instrument can be used to determine the sound level of a variety of sound sources. The sound level meter has a built-in microphone which has the same response as the average human ear. The sound level can be read off the built-in meter, which is provided with two scales: one for high and one for low sound levels. The instrument has a built-in reference sound source for calibration checking and a battery level check. The instrument is supplied with a case, a 9 V battery and instruction manual with sound level table. Low range: High range: Dimensions: Mass: 40 - 80 dBA SPL 80 - 120 dBA SPL 160 x 65 x 38 mm. 165 g 2528.20 Sound level meter 1480.00 Sound Level Meter, Digital This robust, user-friendly decibel meter has a 4 digit display which is updated every half second (for “fast” response mode). The measuring range is from 30 dB to 130 dB with 0.1 dB resolution. There are three sub-ranges, and the user can choose dBA or dBC weighting. The instrument is provided with a max/min feature and an AC/DC output for connection to a chart recorder or data collection unit. There is a connection for an external 9V DC power supply. Supplied in case with manual, battery and wind shield. Technical Specifications: Measurement range: 30-80dB, 50-100dB and 80-130dB. Accuracy: +/- 1.5 dB. Resolution: 0.1 dB. Frequency range: 31.5 Hz - 8 kHz. DC output: 10 mV/dB. Impedance: 50 ohm. AC output: 1 V RMS at full scale, impedance: 600 ohm. Power supply: 9V block battery or line adapter. Size: 275 x 64 x 30 mm. Mass: 280 g. 2528.30 Sound Level Meter, Digital 2528.30 Metronome This metronome is mounted in a polished wooden box. It can be set for the frequency range 40-208 counts per minute. Mechanical clockwork. 1480.00 Metronome 36
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Ripple tank - Serrata Science Equipment

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