SW-2688 - ESAW Sound Wave Demonstrator 

The kit is specially designed for investors into reflection and refraction interference pattern in the air, detection and measurement of phase differences in the signal received by two receivers, measurement of wavelength using the phase difference between transmitter and receiver etc. Units are housed in boxes 130x85x45mm and the set comprises three transducers and one control box as follows. Transducers may be used as either transmitters or receivers, Electrical connections are made via. 2m screened lead with 4mm plugs. The control box having 1M of screened input lead with 4mm plugs & two pairs of 4mm output sockets. The switch permits phase reversal between the two outputs.