RGB Color Sensor (with IR filter and White LED) TCS34725 1302 Arduino Mega 2560 includes everything

Arduino Mega 2560 includes everything the user needs to support the MCU

MQ-2 Gas Sensor module is useful for gas leakage detecting in home and industry

It will return a higher value around 5

Optional Industrial Temperature Range: -40oC to +85oC

RGB Color Sensor (with IR filter and White LED) TCS34725 1302 Arduino Mega 2560 includes everythingIntroduction: The best color sensor on the market, the TCS34725, which has RGB and Clear light sensing elements. An IR blocking filter, integrated on chip and localized to the color sensing photodiodes, minimizes the IR spectral component of the incoming light and allows color measurements to be made accurately. The filter means you'll get much truer color than most sensors, since humans don't see IR. The sensor also has an incredible 3,800,000: 1