For safety reasons, these analog sensors are packaged inside the Tube. Putting analog sensors into 8-SOIC (0.154, 3.90mm Width) packages prevents them from being damaged. It is necessary for proper operation of this sensor to have 8 pins. It contains 8 terminations. Nominally, this sensor can supply 125μA current to make it work. It is recommended that the sensor's current output be set to 10mA for optimum performance. An output voltage of 6V should be expected from the sensor.