Specialized level sensor for dispensing machine equipment, RF admittance level gauge

Traditional capacitive level gauges increase the capacitance between the probe and the medium in the circuit as the liquid level rises. Due to the imbalance of the capacitance bridge caused by the change in liquid level, the change in capacitance value depends on the dielectric constant of the measured liquid. Then, by detecting and amplifying the signal, the corresponding signal is finally output. However, due to the influence of crystallization and hanging materials, the capacitive level gauge cannot stably output the measured liquid level for a long time. Radio frequency admittance measurement technology is an advantageous liquid level measurement technology that can achieve separate measurements of impedance and capacitance. According to the laws of physics, it can be calculated that the impedance and capacitance of any hanging material are equal. Therefore, the influence generated by hanging material can be measured and eliminated from the total output through the phase shift of the oscillation circuit. The measurement result has high accuracy and is currently a widely used measurement technique.