Which DAQ device should I choose

[alex.]

4 Signals need to collect data at same time. All the 4 channels need isolation.

The requested sampling rate is 50k, and the longest sample time is 10 seconds. One channel will trigger the other 3 channels.

The input Signal is from 1V to 110V, voltage differential sensor may needed. 

It is used on a portable device, the smaller the better. USB connection or PCI connect both accepted.

Any suggestion, thanks.

[AdnanZ]

This might help narrow down your search. I am not sure if there are devices that can take that high of a voltage, you might need to attenuate your signal externally. You should consider contacting the local FSE of your area.

[alex.]

Do you know how to buy or make a voltage attenuator.

By the way, what does FSE mean. Thanks.

[kikiduu]

You may go for NI 6115 card with some attenuator probes. You can buy these probes from tektronics.

Just check whether 6115 meets your isolation  need. Else you can always use SCXI modules for isolation.

[alex.]

Is there any PCI, USB or others. PXI or SXCI may too high end, the price also high.

[kikiduu]

You can use PCI 6115.

[kikiduu]

I guess a better solution will be attenuator probe and USB-9219. It will be cheaper than 6115.