Alfa Romeo Giulia/GT Junior fuel sender unit for Veglia Borletti and Jaeger fuel level gauges.
Made by IDRO-STOP, a company that supplied Alfa during the 70s with original parts number 105083205000 (Veglia Borletti) and 105083205001 (Jaeger)
These are the following technical data (resistance) for the two types of fuel senders (Veglia and Jaeger):
Veglia:
Float up: 16 Ohm, float down: 338 Ohm, float in the middle: 120 ohm.
Jaeger:
Float up: 84 Ohm, float down: 8 Ohm, float in the middle: 42 Ohm.
Veglia sender has three "windows" where the variable resistor is visible whereas the Jaeger sender is solid without the variable resistor being visible.
Both senders have two wiring sockets with T and W designation. T & earth drive the gauge and W & earth drive the low level indicator lamp.
Compatible with the following models: Giulia 1300/1600 (Berlina, Ti, S, Super), GT Junior, Giulia 1750 (Sprint, Berlina, Coupe