You'll get reliable performance if the photoelectric sensor's temperature is 0°C~70°C. For these electronic components to function, a circuit or system should have 0 volts. It is imperative that the photoelectric sensor is operated at a minimum temperature of 0°C in order to ensure its reliability. Having a maximum operating temperature of 70°C ensures that the system will operate reliably. The photoelectric sensor must be connected to 3 pins in order to function properly.