Magnetic needle, with longitudinal dimension of 100mm.
With support for the center axis, with conical bearing with needle.
With N and S poles painted in blue and red respectively.

Two coils with 200 turns made of enameled copper wire each
The power supply 4-6 V DC source
The coils may freely place the lateral arms of the core
The distance between the axes of the core arms 5 cm.

The model have six diametrically and equally spaced transparent plates, one of which is interchangeable
On the plates a lot of easily moving ferromagnetic arrows
One of the interchangeable plates has an arcuate notch for installation in a U-shaped magnet model

Magnetic needle, with the longitudinal dimension 40 mm, with support for the median axis and conical bearing with needle
With N and S poles colored in blue and red, embedded in a cylindrical transparent plastic box with a diameter of 45mm.
The needle pivot on the axis so that it does not fall by twisting the box

Measuring range 0-50ma / 500ma / 5A, DC current, division 1/50 of the maximum limit, left zero position indicator, with zero position adjustment, stationary,
Dimensions 100x100x140 mm

Measuring range 0-10V, DC current, 0.1 V division
Left zero position indicator
With zero position adjustment, stationary
Dimensions 100x100x140 mm

Measuring range 0-2 A
Alternative current, 0.1 A division
Left zero position indicator
With zero position adjustment, stationary
Dimension : 100x100x140 mm

Measuring range 0-3V / 15V / 30V,
Alternative current, 0.1 V division,
Left zero position indicator,
Zero position adjustment, stationary
Dimensions 100x100x140 mm