Ultrasonic sensor manufacturers manufacture devices that its application ranges from Detecting the presence and position of an object to measuring distance for which it generates a signal using either 40kHz or range beyond hearing, this data is then transmitted out. Notable features of these sensors are obstruction sensor, proximity measurement and observing the liquid level. The features that make these sensors technological are the compact design, ruggedly constructedness..... and their capability to operate very well even in harsh environments without any influence of dust or smoke or steam which might prove fatal for others. They are used in automotive e.g. parking assist; robot systems don't run away from home: process control applications – such technology has been miniaturised to measure pressures in gas flows or liquid vessels down on the production line if there everwas any question of how things were happening because high frequency sound waves also put through material like