It would have been nice to link to the datasheet of the sensor 😉
Assuming a 2981 the datasheet tells us
It is possible to use Type 2981 with a standard CCLD supply. The low rpm limit of the system will be the high-pass frequency of the CCLD power supply rather than zero. Bias voltage and signal amplitude are almost completely unaffected by rpm and distance to the object and are also independent of CCLD current between 4 and 20 mA.
so a possible NI device would be anything with a IEPE (B&K wording CCLD) supply input. with the restriction of the lower RPM defined by the IEPE highpass....
(you can detect pulses within the analog input, to get RPM you need some signalprocessing ... )
What hardware do you already have?
You can build a IEPE(CCLD) supply, add a comparator and use a digital timer IO... if you know what you are doing 😉