Description and general specifications.
The magnetic oil level gauges serve the purpose of visually indicating the oil level in a tank or in a
conservator of oil filled transformers.
This instrument is composed of a disc indicator (or a red pointer) behind a dial frame and a float linked to
said indicator by means of a magnetic field of force.
The indicator disc is for one half enamelled white and, for the other half, red. Alternatively the colour
proportion visible through the dial glass indicates the respective level position, whilst the dial face is marked
at minimum and maximum oil level and at level corresponding to 20°C and 85°C (on demand other markings
are available).
The oil level indicator's float follows the oil level fluctuations thus causing a permanent magnet to be shifted
in turn.
This last is connected, by means of a magnetic field of force, to another magnet located into the external part
of the oil level indicator casing. The rotation of the internal magnet will cause, on its turn, the rotation of the
external magnet which is integrally fitted to the disc indicator / red pointer. The magnetic joint consents to the
two-colour disc / red pointer to be not immersed in the oil but separated from it by an oil tight partition which
is cast integrally to the instrument's body.
When the conservator oil level is at its minimum there is visible within the dial only the red portion of the
indicator disc, whilst an oil level increase will progressively bring into prominence the white portion of the
indicator disc.
The gauge may be provided with one, two or four microswitches for signalling of minimum and/or and
maximum oil level.

Casing : weather proof light metal alloy, stove enamel finished, suitable for outdoor mounting
Protection degree : IP 54.
Microswitches making & breaking capacity :
ï 3A 1 25/250V AC (resistive)
ï 0,5A 1 25V DC for inductive load L/R= 40ms
ï 0,25A 250V for inductive load L/R= 40ms

Insulation test : 2000V 50Hz between terminals and earth for a 60 sec. time.
Working temperature : all the magnetic oil level
gauge are suitable for working with:
oil temperature between -25°C / + 1 20°C
ambient temperature between -25°C /+ 60°C
Float movement : this may be in the radial direction (type ìBî) or in the axial direction (type
ìAî)