FIELD: medical engineering. SUBSTANCE: device has analyzer transducer connected to the master microswitch via amplifier and integrating unit connected in series. Indicator unit connected to indication photodiodes is mounted in the output circuit of the master microswitch. Reference voltage source is connected to the control unit and master microswitch. The analyzer transducer is connected to the reference voltage source via additional microswitch. Amplifier, master microswitch and indication unit are connected to control unit. EFFECT: high accuracy in determining potassium concentration. 5 dwg
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