I need to read (i.e. count) pulses from approx 30 channels. All are low frequency, from a few pulses per minute to a few pulses per hour. The pulses come from flow meters, each pulse represents a certain gas volume.
Since the U3 only has 2 counters and 2 timers, I thought it may be possible to use streaming mode for 15 flex-IO channels, using 2 U3 Labjacks. Data aquisition will probably be done with DaqFactory.
Can anybody confirm that this is possible, e.g. by connecting one wire of each flow meter to ground and one wire to a flex IO channel which is pulled up as long as no pulse is coming in? Or maybe there is another better way of aquiring many counting channels with the U3? Or should I look for another device with many preconfigured hardware counters? Any advice is appreciated!