Advantage:• Long detection distance: Up to 4mm, helps detect objects from further away.• High accuracy: Can detect small metal objects with high accuracy.• Fast response speed: Up to 500Hz, helping the sensor operate quickly and accurately.• Good anti-interference: Can operate in electromagnetic interference environments without being affected.• Easy to use: Just connect power and output, simple and convenient.• High durability: IP67 protection level, can operate in harsh environments.• Reasonable price: Compared to other proximity sensors on the market, PPRD12-4DN has a competitive price.Feature:• Automatic adjustment function: Helps the sensor automatically adjust parameters to suit the operating environment.• Alarm function: Alarm when a metal object enters the sensor area.• Timer function: Allows setting the sensor's operating time.• Key lock function: Prevents incorrect parameter settings.