Often times, only one set of expensive test equipment can be purchased. The impedance analyzer is a common piece of equipment that fits this bill (new impedance analyzer ~$30k). This creates a bottleneck in transducer testing.

In order to solve this issue, you should consider writing a script to use an Arduino to trigger a relay board. With simple wiring and some scripting, you can use the 8-channel relay board above to test 8 transducers at one time. There are also readily available 16 relay boards. You can even wire one of the relays to a test device to ensure consistency between measurements.

What would you do with the extra time you save by collecting your data 8x as fast? Testing one transducer not only takes longer, but it involves manual labor and concentration. Do the math and be good to yourself; invest a little time in automation.