An electrochemical transducer (ECT) with the operation principle based in the phenomenon of molecular-electronic transport is a set of electrodes placed into the solution of electrolyte (Fig. 1).As a rule, a solution used contains a high concen tration of background (not participating in the elec trode reactions) electrolyte with a slight additive of the active component for charge transfer through the liq uid/metal interface on the electrode surface. It is known that in this case, it is sufficient to consider only the fluxes of the active component to account only for diffusion and convective transport to calculate the current in the system. The role of the background elec trolyte is limited to screening the electric field in the liquid and thus suppression of migration charge trans port. Operation of the sensor is based on the fact that the rate of the electrochemical reaction on the elec trodes is much higher than the rate of supply of the reacting substances.The principle of ECT operation can be easily explained using the approximation of planar perme able (for liquid but not the charge) electrodes first developed in [1]. When electric voltage is applied to the system, electrochemical current appears (the so called "background current") independent of the presence of mechanical motion (Fig. 2a). In this case, electrochemical reactions cause the development of the concentration gradients of the solution compo nents and charge transport in stationary electrolyte occurs through diffusion of ions from one electrode to another.Abstract-The most important advantage of motion parameter transducers based on mass and charge trans port in electrochemical systems is exceptionally high rate of mechanical signal conversion to electric current. Devices of this class are based on the principle of diffusion charge transport under the conditions of forced convection appearing as a result of external acceleration. This work shows the possibility of development of modern high-technology devices based on an electrochemical transducer developed using up-to-date microelectronic technologies.

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This paper describes the use of MET-based low-noise angular motion sensors to precisely determine azimuth direction in a dynamic-scheme method of measuring the Earth’s rotational velocity vector. The scheme includes sensor installation on a rotating platform so that it could scan the space and seek for the position of the highest Earth’s rotation vector projection on its axis. This method is very efficient provided a low-noise sensor is used. A low-cost angular sensor based on MET (molecular electronic transduction) technology has been used. The sensors of this kind were originally developed for seismic activity monitoring and are well known for very good noise performance and high sensitivity. This approach, combined with the use of special signal processing algorithms, allowed reaching the accuracy of 0.2°, while the measurement time was less than 100 seconds.