Hi Luis, If your inputs are sine waves, you're probably best off using analog input, though if the voltages are correct, you might be able to use counters.
The conversion from the voltage outputs to mm distance is dependent on the sensor, so you will have to look in its documentation or search the web to find the parameters for your device. Once you find these values, you should be able to convert with a pretty simple LabVIEW application based on the input signals, either using their exact values or counting cycles, whichever is appropriate for your sensor. If you need more help with the conversion, please post more detailed information on the encoding of your sensor. Thank you, Kyle Bryson National Instruments
