The DT9824 USB DA module for portable test and measurement from Data Translation Inc., Marlboro, MA, has 24-bit resolution and the ability to accept 4 simultaneous analog inputs at throughput rates of up to 4800 Hz. Other features include a 24-bit analog input subsystem; 1000 V galvanic isolation channel-to-channel; optional signal sampling ranges of ±10 V with programmable gains of 1, 8, 16, and 32; software and external triggering; single-value and continuous conversion modes; USB power; and 16 digital I/O. Software is included. Applications include chromatography, seismic, weigh scale, and medical uses as well as other measurement applications that require both accuracy and stability.