A constant phase element sensor for monitoring microbial growth

The construction and performance of a novel constant phase element (CPE) sensor for monitoring microbial growth has been reported in this paper. The signal conditioning circuit measures the changes in the phase angle of the impedance characteristics of the probe. The major advantages of the measurement system developed are the simplicity of the construction of the probe and ease in measurement. It is proposed that the sensor can be effectively used for monitoring bacterial and yeast growth.