This Load Sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales. This sensor can measure up to about 110 pounds. 

This is the Infrared Proximity Sensor made by Sharp.

Life has its ups and downs, so why not measure them? The MPL3115A2 is a MEMS pressure sensor that provides Altitude data to within 30cm (with oversampling enabled).

This LED Matrix 24 × 8 display is specially designed for the FireBeetle series. It supports low power mode and scroll display. With HT1632C high-performance LED driver chip , each led has an independent register, which facilitates separate driving. Integrates a 256KHz RC clock, only 5uA in low power mode, supports 16-scale PWM brightness adjustment. This product also works with another Arduino microcontroller like Arduino UNO (same as DFRduino UNO).

Carbon monoxide detector with alarm - orno

LCD Gráfico 128x64 STN LED Backlight