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Imagine a small phone shaped device that a worker can wear. As the temperature and humidity change, the device displays whether it is safe to be in that environment or whether they need to seek shelter / warmth via a green / yellow / red LED indicator and audio alert.
This is based on the concept of the wet globe bulb temperature and using some validated algorithms, allows the wearer to know whether it is safe.
I know the principles and that it can be programmed on arduino in theory, but need someone to take it to a prototype.