Specification :

Water proof type ultrasonic sensors were widely used for parking sensors, proximity sensors and level sensors, etc. With perfect seal these sensors can be used in a relatively poor environment such as dust and humidity.
Open type ultrasonic sensors have wide applications for remote controller, burglar alarm, object detectors and range finders. Compare with the water proof type ultrasonic sensors, they have a much longer detection distance, but they can’ t be used in dirty or wet conditi