Very popular for use as a Null Detector for potentiometric
set-ups and bridges. Housed in bakelite case with lamp and
scale arrangement. Taut band type movement. Movement sufficiently
protected against shocks. Alcomax magnet properly aged for
high stability. Clamp 150 mm; long, easy replacement for lamp.
Operated at mains 220 Volts a.c. or 6 Volts d.c. band switch
for 5 shunt Dimensions overall 220 * 225 * 132 mm approx.