ІV-12 - luminescent seven-segment indicator, in a glass flask.
Indication of green color is shown through the surface of the balloon.

Technical characteristics IV-12
Brightness – >450cd/m²;
Kut look around - > 45 °;
Irregularity of light - <50%;
Tension voltage - 1.5 ± 0.15V;
Strum voltage - 100±10mA;
Anode and grid voltage in static mode - 27V (25.30V);
Anode and grid voltage in pulsed mode – 60V (50.70V);
Strum anode-segment - 0.9mA (static) <1.8mA (pulse);
Strum anode-segments - 3.5.5.0 mA (total);
Strum sіtki - 12.17mA (static) < 45mA (imp.);
Shparuvatist - 10±1;
Direction - 10000 hours;
Masa - 18g;
Expand the sign - 21 × 14.6 mm;
Indicator dimensions - Ø22x60mm;