Hall effect sensor is a such type of integrated, non latching sensor which is widely used for identifying the magnet pole polarity. It’s one side identify one magnetic pole such as positive magnetic pole and other side identify other one magnetic pole such as negative magnetic pole. 
Specifications:
Digital Output Hall-effect sensor
Operating voltage: 4.5V to 28V (typically 5V)
Output Current: 25mA
Can be used to detect both the poles of a magnet
Output voltage is equal to operating voltage
Operating temperature: -40°C to 85°C
Turn on and Turn off time is 2uS each
Inbuilt reverse polarity protection
Suitable for Automotive and Industrial Applications