S-Range Scaler-Timer Age 4-5 more economical version of the

more economical version of the Standard Boyle's Law Apparatus

ideal for primary PE lessons and active play

Can be played by individuals

• Diameter:9cm

300mW amplifier with variable gain and input impedance of 1MΩ with connecting lead (co-axial to 4mm plugs)

S-Range Scaler-Timer Age 4-5 more economical version of theA general purpose scaler timer suitable for radioactivity counting utilising Geiger Muller tubes ; and as a general purpose millisecond digital timing device with manual or electronic triggering. The bright L. E. D. has six digits, 24mm high, making it suitable for individual use or class demonstration. In the radioactivity mode an adjustable 300 to 500V E. H. T. supply for G. M. tubes. Loudspeaker sockets are also provided for use when an audible