I saw an infographic recently that indicated that the typical cost of sensors within the internet of things was around 60 cents and has made me think what kind sensor can you get for this kind of money? What performance will you get? What is the long term reliability like and how does the sensor drift over time? Also, what signal comes out of these sensors and how is it immune to noise..?
For simple meteorological measurements, such as measuring room temperature, then 60 cents is possible, but this is for a piece of silicon that needs to be embedded onto a circuit board. We’ve recently fitted temperature sensors in the depths of a train to monitor the performance of a heat exchanger used to keep the batteries at the right temperature and I can’t imagine a 60 cent piece of silicon lasting very long or giving decent accuracy over the required temperature range.
When deploying any sensor you need to consider not just the cost but the performance, the mounting, the accuracy and so much more, including the signal. The internet of things industry needs to use the worlds of sensing and instrumentation to ensure they have robust, reliable solutions. I’d love to hear about your applications but please don’t expect to get much for 60 cents..!