If you are looking for data acquisition and data logging equipment, there are many of them out there. The choice is what do you want or need. Here are a few that you may find useful and hopefully will satisfy your needs:
DataQ Instruments: DataQ sells PC type data acquisition equipment that works with your PC. They have various options to choose from. One of their models is the DI-710. This plugs into your PC by way of a USB cable or by way of an Ethernet connection. It sells for $499 but can do the job.
Pico: Pico specializes in data loggers. One such data logger is the ADC-10/12. It costs less than conventional ones but does the job. It also includes data logging software. It sells in the United States for $108.
National Instruments: NI sells many types of data acquisition hardware. They sell Compaq laptops with the data acquisition hardware included, or you can buy their adapter cards.
The DataLoggerStore: Here is the granddaddy of them all. You can find any type of data logger you want right here. They have any type from small to large ones. To get a better idea as to what they have you would need to visit their store to see exactly what they have.