Sensor to detect Human Presence

There are 4 main technologies that can meet these requirements - ultrasonic, video, radar, and lidar. You can find many commercial systems based on these technologies, including wireless versions. Search for terms like rear object detection system or parking assist system or vehicle backup system. Most of these systems are designed for vehicle applications and are suitably rugged. If you want to protect them more, simply mount them in waterproof shock-mounts. All of them probably need periodic cleaning if they are expected to work in muddy environments.

Many thanks. I did find few manufacturers like eaton , rostro vision eagle eye etc... will get in touch with them, though not sure about their operating frequency.  I would be grateful if you can suggest one or two suppliers similar to preco from mining application point of view.

The frequency should be 2.4 or 5.85 Ghz. Detection distance to be minimum 5 mtrs, preferably 10 mtrs.

Can you suggest any other alternatives that are effective inside a car.

Since I can't use cameras due to privacy problems.

You could detect pressure on the seat or (IR) temperature of the occupants.

Assalamoalikum Dear Sir....

Sir how can we connect the sensor with the server for communicating for incoming and for outgoing people in a Bus or any other vehicle from which we can justify that in which number of people are in or out and how much capacity is available in Bus,,,,,,,,,,,

please sir suggest me for a better result please sir,,,,

please sir reply fast as soon as possible,,,,,

The simplest solution is probably a cell phone that takes a picture of the bus interior whenever you want to know how many passengers are on board. There must be many apps that can handle this - either automatically sending images wherever you like or supplying pictures on demand.

The trains in London are trialing a system that tells you how full each carriage is by weighing is.

sir we have Final Year project for bus service. The project  will be included two android apps that is one on the conductor side and other is on the student side .Further more we have a website for administration side that will be used for the whole monitoring process.The conductor app is such that it will student requests and the bus seats capacity and also the GPS will be enabled in that.And the user app is such that to trace a particular  bus location monitor the time to reach the city and seat capacity and apply for seat in advance.

We have administration side that will add the new bus , add capacity , assign location and will generate the particular bus reports for a specific period of time .

so please sir guide me in a easy way to connect these three apps and how we store the data of these three apps and assign to the student and also to the administration in an easy and a better way please sir,,,,,,,,,,,,,,,,,,,,

I know this thread is old but I am looking for a Human Presence + Distance as well. This will be used in the kitchen where sensor will expose to HOT heat from the stove or sunlight from window/s. I've looked into PIR, Radar and Imaging. I saw CO2 above so let me do some reading. Any suggestions? Thanks.

You can use proximity sensors to count how many people enter or leave through a door.

If you use 2 sensors, you can tell which direction the person is going by which one gets triggered first.

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