A very popular instrument housed in spacesaver case. Detects currents as low as 1pA on the 100pA range. Input voltage upto 5kv. BNC socket for sheilded lead. Auto-zero facilty.

Output voltage 1-0-1V a.c. and 2V d.c. at 10A. Tolerates short circuits. Transformer protected by thermal trip and slow blow fuse. Internal fan for cool running under heavy loads. This unit replaces the westminster power supply providing high currents at low voltages and tolerating short circuits.

An exciting way to learn about optics by building and exploring common optical systems.
All the optical items can be used individually for teacher-designed investigations.
Contents:
Laser Ray Box and plugtop mains adaptor (5V)
6 laminated magnetic Workcards approx 400 x 280mm
6 acrylic lenses, 5 numbered for identification
3 mirrors: plane, convex and concave
2 semicircular blocks/lenses
1 right angle prism
1 rectangular block
1 straight “light pipe”
5V plug top power supply for LED lines
Sizes: Optical items and Workcards 430 x 350 x 60mm Mass: 1.72kg
Laser Ray Box 100 x 75 x 40mm Mass: 250g