Changing Arduino Outputs into Binary
It sounds like what you want isn't really "binary", nor the bit-to-characters expansion of the touch readings.

Rather it sounds like what you want to do is to print the character '0' or '1' for the state of each button.  You already have the decisioning code for your outputs, so you can simply extend it for the serial prints:

if(sensor1 &gt;= 1000) {
   digitalWrite(3,HIGH);
   Serial.print("1");
} else{
   digitalWrite(3,LOW);
   Serial.print("0");
}


and so on, with the next set having tabs and the last a newline.

Worth noting, intermixing the printing and digital outputs will put some time delay between the outputs (potentially quite a bit if the evaluation gets ahead of the serial buffers), so another option could to do all the outputs and then all the prints, or store the decisions in a bit mask for later printins, etc.