Impedance measurements with second-order harmonic oscillator for testing food sterility

An interface circuit for R-C impedance sensors with a relaxation oscillator

A multi-period interface system for impedance measurements

A novel technique to measure two independent components of impedance sensors with a simple relaxation oscillator

A system for testing the sterility of food products with impedance measurement

Interface circuit for impedance measurement to test sterility of food products

Interface system for impedance measurement based on a relaxation oscilator