The analog sensors are packaged in the Tube for safety reasons. For protection against damage, analog sensors are enclosed in 20-SSOP (0.154, 3.90mm Width) packages. A sensor with 20 pins functions properly. DC circuits should have a maximum voltage of 5.5V. Nevertheless, this magnetic switch can supply a DC circuit with a voltage as low as 3V. It is possible for the analog sensors to supply 5.5V voltage when they are in operation. It has 20 pins.