Idea for adding analog code to read beer in a tin or bottle

[Adamzsite]

Is this code right,

void triggerFullFillSensor1() { Serial.println( "Beer fill sensor 1 triggered" ); // Close beer inlet solenoid. digitalWrite(BEER_INLET_SOL_1, LOW)&&((BEER_FILL_SENSOR_1)<400)); fillSensor1Triggered = true; }