What is the difference between a sensor module and a sensor?
Let's take the temperature and humidity sensor as example
There is a temperature and humidity sensor but there is also a temperature and humidity sensor module. What's the difference?
The modules often contain extra components to make the sensor easy to use. Like voltage regulator and level shifter to use a 3,3V sensor with 5V, decoupling caps, current limit or pull up resistors, connection headers, etc.
Modules are designed to be easy to put together into a larger system, ie usually there would be
a selection of modules from one supplier that are designed to play together in a logical way.
People sometimes generalize this to include any random breakout-board, but that's not really the
point of modularity. For instance Arduino shields are modules.