This is a set of 37 sensors ready to be connected up to a microcontroller, e.g. Arduino or RaspberryPi. A great package for Arduino experiments or as a basis for a larger project.
This is the HC-SR04 ultrasonic ranging sensor. This economical sensor provides 2cm to 400cm of non-contact measurement
Detection method using low temperature cycling (1.5V heating) to detect carbon monoxide,
MQ-135 module is widely used in air quality control equipments for buildings/offices, are suitable for detecting of NH3,NOx, alcohol, Benzene, smoke,CO2 ,etc
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