Overview / Features | CNT-3204IN-USB | Counter USB I/O unit 4ch (32bit Up/Down count 500kHz) / Incremental encoder interface / Isolated - N series | CONTEC
USB Digital Input Module | USB DIO Device – 4/8 Channels
Usb Daq Simultaneous Data Acquisition Card 8 Channel 16bit Analog Input Ad, 2da, Isolated 8di / 8do Pwm Counter Module - Add On Cards & Controller Panels - AliExpress
Overview / Features | CNT24-2(USB)GY | Counter USB I/O unit 2ch (24bit Up/Down count 500kHz) / Incremental encoder interface / Isolated | CONTEC
Mini Usb Daq Data Acquisition Module 0-3.3v Analog 12 Adc, 2 Dac, Digital 8di 8do, Pwm Input Output, Counter, Screw Terminal - Pc Hardware Cables & Adapters - AliExpress
USB Frequency Counter High-Precision Frequency Meter Acquisition Module | eBay
Digital Input Counter/Frequency/Encoder Module USB-2084
Amazon.com: FA-5 FREQ Counter USB Frequency Counter Acquisition Module Frequency Meter 26.5GHz : Industrial & Scientific
New USB Digital Module provides fifteen independent counter/timers