>Hi All,
>
>I look for a serial data reader. I found these products:
>
>http://www.photologic.ca/serial_logger.htm
>
>https://www.acumeninstruments.com/
>
>Does anyone know better models (cheaper, wifi featured or something else...)?

What do you want to use it for? Your links show industrial products that are ruggedized and designed for fool-resistant operation. That makes them low volume and expensive.

Purely from the hardware side you can probably get something much cheaper in the high-volume Arduino or Raspberry Pi ecosystems. But, unless someone has already packaged the parts and functions you need, you may be looking at assembling parts and cases, and doing some programming yourself.

There are various tiny form factor PCs available. Only a few have RS-232 style serial ports or connectivity, although most support USB so you might be able to use a USB to serial adapter. Some links I quickly found on Google, there are lots out there:

http://www.tinygreenpc.com/
http://www.ewayco.com/100-low-cost-pc-products-low-cost-systems-embedded-systems-servers-lcd-pc-panel-pc.html