Abstract
The main factor determining the functioning of the track biosensor is the influence of the composition of an ionic liquid flowing through the track on the ion current density at a certain external voltage. When any contamination enters the ionic liquid flowing through the track, the current density changes. This change determines the sensitivity of the biosensor. The amplifying electronic circuit of the device makes it possible to vary the sensitivity parameter over a wide range. In this work, it was found that the sensitivity of the biosensor depends on the mode in which it is operated. This means that the mode of operation must be selected depending on what sensitivity is required in each particular case.