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Thermometers, pressure gauge, such as how to connect computers, computer time to record temperature, pressure?

There are many ways. A simple give some, you can combine the scene, as well as your economic strength to do.
First, the use of higher-level units too PLC + software. External signals into the PLC, and configuration software to read through the PLC signal. Shortcomings of this approach is high cost advantages of such a system is due to PLC control and therefore have a simple programming easy maintenance;
Second, the purchase of thermometers and pressure gauge when these instruments with all the requirements of RS485 communication, and open communication protocol. Then these signals through the 485 communications access to computers. The shortcomings of this method are obvious communication interface with these meters are increased purchase costs, and this approach requires a PC programming experience. The advantages of this method is that if the instruments are widely distributed at the scene and circumstances distance, cable will save a lot of costs.
Third, the purchase of inquiry, similar to the IO boards and modules, these external signal access module, a computer interpolation of the board. Similarly, this method also requires a certain programming capabilities. Above method is contacted by me and the specific application of the approach, many do not rule out a better solution.