one of the major safety concern of any home or office is security, this security system makes you of sensor that senses the body temperature of any individual along its part and send it a microelectronic to take an action, actions like "call the police", "lock the intruder in", " take photographic image of the intruder and so may things that can make the intruder unable to escape.
This device is called proximity infrared receiver, the step by step methods of programming this device is can been seen here https://electronictechhub.com/configuring-pir-sensor/ this sensor is programmed using C-language and it can be applied also in the production industry also lighting (for energy conservation ) we can also configure this sensor so send data to the internet for advanced monitoring system