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Made of stainless steel and fitted with a float, it is used to detect the level of a liquid inside a tank and can activate a pump, an indicator light, an alarm or another device

Immersed in a liquid it returns a voltage proportional to the level, down to a depth of 48 mm; it runs on 2 to 5 Vdc.

Small I2C module based on the MAX30102 pulse oximetry sensor, able to measure the amount of bound haemoglobin in the blood and the heart rate without breaking the skin

Set made up of a module based on the Maxim MAX6675 chip and a type “K” thermocouple with a temperature range from 0°C to +600°C. The MAX6675 digital converter provides a digital serial interface compatible with Arduino, Fishino or other microcontrollers

The RCWL-0516 is a small, compact microwave motion sensor based on the Doppler effect

Small breakout board based on the ML8511 ultraviolet light sensor. It measures the intensity of the UV rays from sunlight, lamps or other sources, with a wavelength between 280 nm and 390 nm

Motion sensor using a mercury switch

Small breakout board based on the Freescale MPR121QR2 chip, a capacitive touch sensor controlled over an I²C interface

Breakout board built around the MLX90614 infrared (non-contact) temperature sensor