High precision non-contacting dimension measuring capacitive sensor device for industrial environments - uses fixed reference sensor with secondary active sensor supplied with gas flow between electrode and target

摘要

The device uses a variable gap capacitance sensor in conjunction with a primary reference capacitance sensor with a fixed gap. Orifices are provided to allow gas under pressure to flow between the measurement electrode and the fixed plate of each capacitor. The gas flow prevents dust or liquid contaminants from entering the air gap where they would cause disturbance to the readings. USE/ADVANTAGE - High precision measurement, in particularly rolling mills, machine tools and/or in petrochemical industries, of displacement, position, speed and acceleration in polluted industrial environment and conditions of varying temp and pressure.