Non-contact electrical conductivity measurement system

The CONDUCSENS electrical conductivity measurement system operates on the eddy current principle: the sensor emits a high-frequency magnetic field which causes eddy currents to appear in a conductive target. These currents generate a secondary magnetic field. By capturing this secondary magnetic field, the sensor gathers information on the target's properties: its electrical conductivity, thickness, shape, sensor-target distance, etc. The eddy current method enables the electrical conductivity of a material to be measured without contact, and even through another layer of non-conductive material, which is impossible with other traditional methods.

Sciensoria's CONDUCSENS system is the only one on the market to measure the absolute value of electrical conductivity over a wide range: from 10,000 S/m (100 µWm) to 70,000,000 S/m (0.014 µWm), with no need for prior calibration. It can be used to measure electrical conductivity on foils or thin-film deposits of conductive material. The measurement is accurate even at varying distances: unlike traditional eddy current technology, the sensor-target distance has no influence on the measurement result. Installation is easy: the sensor can be tilted or not in contact with the target. The user-friendly measurement software runs under Windows. The measurement report is generated automatically, and data can be displayed as figures and curves ready for insertion into reports. It consists of an eddy current sensor, a complex impedance analyzer (here Agilent's E4980A model), and calculation software running on a PC running Windows XP or 7.

Technical specifications:
Measurement range: 0 from 10,000 S/m (100 µWm) to 70,000,000 S/m (0.014 µWm).
Resolution: 1,000 S/m.
Target sensor distance compensation.
The acceptable sensor-to-target distance depends on the diameter of the sensor used.
The diameter of the sensor depends on the space reserved for it: no moving metal object should remain within a radius of 5 times the diameter of the sensor.
Measuring zone diameter: 8 mm as standard. Other values are possible.
Target shape: the target must be flat and sufficiently large in relation to the diameter of the sensor (the smallest dimension must be at least 3 times the diameter of the sensor).
Thin targets can be measured as long as this thickness is entered in the measurement software.
Calibration: no calibration
Materials: all conductive materials, graphite, metals, carbon composites.
Measurement rate: from 1 to 10 measurements per second.
Operating temperatures 15° to 40°C.
Warranty: the equipment is guaranteed for 1 year on parts and labor, excluding sensors, cables and battery.