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- Trusted Seller National Instruments 184479D-02- Manufacturer: National Instruments
 184479D-02 | PCI-6601, 32 Digital Channels, 4 Counters/Times, 5 V TTL, Counter/Timer Device Cary, NC

184479D-02 | PCI-6601, 32 Digital Channels, 4 Counters/Times, 5 V TTL, Counter/Timer Device