Is there a difference between industrial and "conventional" sensors?

Question

Arduino

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I'm just a beginner in electronics, don't kick me too hard, but I'm very interested in arduino solutions (they are quite simple, effective, inexpensive and do not require 10 years of experience).
Interested in such moments, in order ...
1. Is there a fundamental difference between sensors used in industry and those sensors that are in arduino, as an example (DHT-22, BMP-180, etc.)?
2. If there is no difference, then I assume that the same iron is often used in commercial industrial sensors only in a different package?
3. Perhaps industrial-grade sensors differ from "ordinary" ones only in that they have a degree of protection according to the IP scale?
4. Well, if you have experience, is there any fundamental difference between using it to transfer data from sensors to a server between WiFi / Bluetooth / 443 MHZ? I think on what it is possible to build the interaction of a circuit with 3-100 sensors and one server (arduino)

Answer 1

The main difference is that an industrial sensor has documentation on verification and verification, a methodology for such verification and verification, and a certificate. That is, it is a measuring instrument, a complete instrument. His testimony has legal significance.
That is, in the industry, no one puts a "bare" DS1820 thermometer. They put the finished device with a certain interface, case, degree of protection, and so on.
You immediately swing at such a scale that it simply takes your breath away. Do you have projects with at least one sensor?
In industry, it would never occur to anyone to put an Arduino-type prototyping board in a system. This is extremely expensive, but it makes no sense - arduina is not an industrial computer and has no chance of becoming one. The execution is not. Industrial gizmos at least have an external hardware watchdog timer (not a prank built into the atmega, but a separate device from the atmega!) And a power monitor. There is also an optical decoupling of interfaces (oops, for the arduino you need a separate shield here, a separate shield is stupid connectors and the science of contacts - what the hell is that).

Answer 2

In short, all sensors are made industrially and according to standards (for example, Texas-Instruments sensors).
Another question is that for each industrial product it is necessary to select a sensor according to the parameters, and then certify the finished product.
From experience, I can say that sensors can have errors in accuracy, different measurement times, they can be digital and analog, they can give a signal by changing current or voltage.
It is not clear with the network of which sensors you are going to work, so it is difficult to advise something.