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It can't detect motion or people behind walls.
EDIT: It can not detect rough surfaced or foam covered fluids very well. it is highly vulnerable to damage when utilised for the detecting the levels of acidic, alkali, and organic compounds within a container. the capabilities of these sensors are GREATLY limited by the surface of the piezoelectric transducer. (more about this particular effect can be found on wikipedia with images to help explain) another drawback is the fact that some ultrasonic sensors (such as the LEGO mind-storms ultrasonic sensor unit) are designed in such a way that the sensor unit does not detect "thin" objects very well unless turned 90 degrees to stand "upright".
edited by Draycos
What else can I help you with?
How do scientists prevent and warn tsunamis?
If the tsunami is the result of an earthquake, then scientists take three locations that the earthquake hit. They find a radius by finding out how long it took for P waves and S waves to hit the land. Once they've drawn circles, calculated by the radius, around all three locations there is an epicenter. This is where all three circles intersect. They then have seismographs that show the damage of the earthquake by a Moment Magnitude Scale. Then they predict that a tsunami will follow shortly after and they warn the countries in danger.
Where is an earthquake's focus located?
An earthquake's Focus is located directly under the Epicenter of an earthquake. The Epicenterof an earthquake is located on the surface of the earthquake.
How did the US find out about the earthquake in Haiti?
The US Geological Survey's National Earthquake Information Center monitors seismic activity all over the globe. When earthquakes above a certain magnitude are detected, they inform the relevant authorities and organisations. Please see the related link.
What type of Sensors are used in traffic density?
IR and RF sensors
Is the haiti earthquake the strongest earthquake ever?
No, the Haiti earthquake in 2010 was not the strongest earthquake ever recorded. The strongest earthquake ever recorded was the 1960 Valdivia earthquake in Chile, which had a magnitude of 9.5 on the Richter scale.
What are the. disadvantages after earthquake?
No
What are the disadvantages of sensors?
They can fail if the system has a malfunction.
What are the disadvantages of a earthquake?
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Advantages and disadvantages of infrared?
Advantages-Many things are controlled by infrared. sensors are invisible to the naked eye and are very reliable. Disadvantages- Most infrared sensors must be lined up or they will not work
What are the advantages and disadvantages of a sensors?
The advantages of light sensors is that they are really good security systems. The disadvantage of them is that they're really easy to set off.
What are the advantages and disadvantages of using sensors?
It's situation dependent.
What do sesmographs use to determine whenb an earthquake bagins?
Seismographs use sensitive sensors called accelerometers or geophones to detect ground motion. When an earthquake occurs, these sensors measure vibrations and changes in the Earth's surface, recording the seismic waves generated by the quake. The data collected is then analyzed to determine the exact time the earthquake begins, as well as its magnitude and location.
What are the advantages and disadvantages of MOISTURE sensors?
SENSORSAdvantages:It can accomodate new devices at anytime.Very accurate.Disadvantages:Expensive .Self heating.
What are the disadvantages of light sensors?
Some disadvantages of light sensors include susceptibility to interference from ambient lighting conditions, limited accuracy in distinguishing between different light intensities, and potential degradation of performance over time due to environmental factors like dust or humidity. Additionally, light sensors may not be suitable for applications requiring precise detection in rapidly changing light environments.
How can be determined the earthquake epicenter from seismic waves?
The simplified answer is that it works much in the same way you would determine the source of a sound (which is also in waves). Multiple measurements of the intensity are taken from different locations are used to triangulate an earthquake.
Disadvantages wireless sensor networks?
One of the biggest disadvantages of large scale wireless sensor networks is the fact that they are vulnerable to unauthorized access. Also it relies on the complexity of logistics involving selective replacement of sensors.
How does a tsunami warning machine work?
A tsunami warning machine depends on information that comes from a network of sensors. These sensors indicate when an earthquake happens, and geologists decide if a tsunami is likely. If so, they send out a warning. If the wave sensors pick up actual tsunami activity, the tsunami warning machine is activated in each of the areas that is at risk.
