The mechanical relays of the AM16/32B multiplexer are needed for switching excitation currents into resistive bridge measurement circuits. The solid-state relays of an AM25T multiplexer, in contrast, are not suitable for this. The switching relays on the AM16/32B multiplexer are mechanical and have an order of 0.1 ohm resistance. In contrast, the relays on the AM25T are solid state with an on resistance of approximately 500 ohm. The significant resistance of the solid-state relays is problematic for the precision excitation current needed for resistive bridge measurements.