In order to ensure safety, these analog sensors are packaged in the Tube. A 20-SSOP (0.154, 3.90mm Width) package protects analog sensors from damage. For proper operation, this sensor has 20 pins. A DC circuit should have a maximum voltage of 5.5V supplied by this sensor. In the DC circuit, however, this magnetic switch can provide a minimum voltage of 3V. During operation, the analog sensors could supply a voltage of 5.5V. Pin number 20 is on it.