The largest collection of sensors for arduino, raspberry Pi and other electronic projects with complete information and datasheets.
Useful for various kinds of sensing circuits, wherein LED works as transmitter and photodiode as receiver.
ESP8266 has powerful on-board processing and storage capabilities that allow it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime.
Measuring the absolute pressure of the environment using a digital barometer such as this has some interesting applications. By converting the pressure measured into altitude
DHT11 uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed)
A very basic temperature and humidity sensor, its working being based on capacitive humidity sensor and thermistor.
Active ultrasonic sensors generate high-frequency sound waves and evaluate the echo which is received back by the sensor, measuring the time interval between sending the signal and receiving the echo to determine the distance to an object.
Used for Detecting: Combustible gas such as LPG, butane, methane, alcohol, propane, hydrogen, etc and smoke
A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.
Soil Moisture Meter testing Module, Soil Humidity Sensor, Water Sensor, Soil Hygrometer Detection module for Arduino
Used to trigger the effect of various vibration, theft alarm, intelligent car, earthquake alarm, motorcycle alarm, etc