Analog multiplexer
Solartron Analytical

The models 1281A and 1281B are computer-controlled analog signal multiplexers with eight channels for use with a Solartron potentiostat/galvanostat, e.g. the models 1280, 1285A, 1286 or 1287A. It can connect the potentiostat signal connections to any of eight different test cells for high performance multichannel testing and automated monitoring. This ability to measure samples sequentially can significantly increase instrument productivity as well as improving sample throughput.

Exceptional AC and DC performance provides for a wide range of measurement capabilities, and all critical signals are independently shielded in the high performance connection cables.

The model 1281A is the basic unit; the model 1281B includes eight voltage hold modules to allow control of electrode potential when a cell is disconnected from connected potentiostat/galvanostat by the multiplexer. For example, this allows an independent and different polarization to be applied to each of seven electrodes/cells while using the main potentiostat to run a Tafel plot on the active cell. The 16 bit D/A converter used within these voltage hold modules allows accurate control over a wide range of potentials in 1 millivolt steps, while their current capabilities of the are suitable for use with larger electrodes.

The multiplexer is controlled via a GPIB interface port.