Industries and organizations have been using various kinds of sensors for a long time but the invention of the Internet of Things has taken the evolutions of sensors to a completely different level. IoT platforms function and deliver various kind of intelligence and data using a variety of sensors. They serve to collect data, pushing it and sharing it with a whole network of connected devices. All this collected data makes it possible for devices to autonomously function, and the whole ecosystem is becoming “smarter” every day. By combining a set of sensors and a communication network, devices share information with one another and are improving their effectiveness and functionality. Top 15 IoT sensors- br 1. Temperature sensors br 2. Proximity sensor br 3. Pressure sensor br 4. Water quality sensor br 5. Chemical sensor br 6. Gas sensor br 7. Smoke sensor br 8. IR sensors br 9. Level sensors br 10. Image sensors br 11. Motion detection sensors br 12. Accelerometer sensors br 13. Gyroscope sensors br 14. Humidity sensors br 15.