List of functions - M18 ultrasonic sensors SU series; M30 TU series and cubic emitter/receiver UHZ series. - Models with power voltage or current digital and analogical output. - High resolution and precision. - Maximum operating distance adjustment on all digital models, both direct and retro-reflective. - Direct reflection,retro-reflective and emitter/receiver models. - IP67 Protection degree. - Plastic housing. - Total protection against any type of electric damages.