Flow Switch with Pulse

I am designing an application for an embedded computer (PC/104) and I
need to attach a FLOW switch w/ Pulse.  It basical generates pulse
output proportional to the rate of flow.   One example is
http://www.clarksol.com/html/crfo_crfa.htm ..

I have a Digital I/O board connected to my computer via RS232 and I can

read other types of inputs such as Start/stop switches, etc..


My question is, since the flow switch generates pulses so quick,  is
there any type of circuit that I can use to read this pulses other than

my I/O board?  The reason I am asking is because I am afraid that
becase these pulses can happen so quick that I will miss some reading
them with this I/O board. 


Thanks in advance, 
Miguel

Mike Gonzalez wrote:
> I am designing an application for an embedded computer (PC/104) and I
> need to attach a FLOW switch w/ Pulse.
> ...
> My question is, since the flow switch generates pulses so quick,  is
> there any type of circuit that I can use to read this pulses other than
> my I/O board?

Clock a counter with the pulse, then take a periodic reading of the 
counter.  You may have a counter on-board, or be able to get a add-on 
board with counter.  A 16-bit continuous counter will probably work well.

-- 
Thad