Founded in 1854, O'Fallon's namesake comes from Colonel John O'Fallon who was a wealthy gentleman from St. Louis. In downtown O'Fallon, a Baltimore and Ohio Railroad railroad depot was built, which helped put O'Fallon on the map.
â¢ Transducers and sensors are physical devices that are used in electrical, electronic and many other types of gadgets and appliances. â¢ Transducers are used to convert one energy type into another while sensors measure energy levels and convert them into electrical signals that can be measured digitally.
A proximity sensor can be made on different input to output response principle. Capacitive sensor, Infra red sensor, Ultrasonic sensor, hall sensor, etc can be used to design proximity sensor; now the question is at what cost and how good in static & dynamic characteristics.