The USB-6008 has just one 32-bit counter. However, it also has 12 digital lines. So I guess it depends on how fast you are expecting to see these pulses. If the speeds are just 10s of Hertz, you could probably complete this task with the cheap 6008, and code your own "counting" algorithm for use with the digital lines.
However, if need to count pulses at high speeds, or with an extended level of determinisim and reliability, you should consider a counter card.
National Instruments offers many, many different counter/timer solutions. I would heartily recommend giving us a call, so you can have a chat with a sales engineer (I am part of NI technical support - not sales). There are USB options, such as our compactDAQ systems. Plus we have plenty of cost effective PCI based solutions - for example, the PCI-6602 provides you with 8-off up/down 32-bit counters .
PCI 6602
https://www.ni.com/en-us/shop/model/pci-6602.html
Furthermore, our new-generation of multifunctional DAQ devices (X series) provide 4-off high speed 32-bit counter/timers for PWM, encoder, frequency, event counting - aswell as high spec analog and digital IO, all within a single DAQ card.
PCIe-6320
https://www.ni.com/en-us/shop/model/pcie-6320.html
If you have any more questions or queries, please give us a call on 01635 523545, and ask to speak with your local sales engineer.
Thanks for your time. I hope this has been useful to you.
Best wishes,
Rich Roberts
Senior Marketing Engineer, National Instruments
Connect on LinkedIn: https://www.linkedin.com/in/richard-roberts-4176a27b/
