Frequency measurement

[udupa]

HI,

     I am searching for one of our application: frequency,current,voltage measurement device.

    Plz suggest one of your product to meet the above requirement

[crossrulz]

For frequency, you want a counter.  Voltage is easy.  For current, you will need a current sense resistor and measure the voltage across it.  Almost any DAQ can handle this.  How many channels do you need?  What are the voltage ranges?  What sampling rate do you need?

My advice is to get a hold of your local NI representative and have a sit down to figure out what card would be best for your situation.