Eddy-Current sensors are actually non-contact equipments. These are designed in a fashion to facilitate high-resolution dimension of a position and/or alteration of position of a conductive target. These sensors are also referred to as inductive sensors. Eddy current is the most common and precise word to be utilized in accuracy based displacement tools. High resolution as well as tolerance for polluted environments makes eddy-current sensors the adept choice for modern age industrial applications.
Basic Hypothesis
Eddy current sensors function via using magnetic fields. The driver produces alternating current (a/c) inside the sensing coil towards the probe end. This works towards creating alternating magnetic field in conjunction with induces small currents inside target material. The currents are referred to as eddy currents. The eddy currents work towards conflicting magnetic field and resist this field. This is usually produced by the probe coil. The basic contact of magnetic fields depends on the space between the target and the probe. With the changes in the distance, electronics instantly sense it in interaction of field and produce voltage output. This is highly proportional to the adjustment in the distance between the target and the probe. The target surface should be at least three times larger as compared to the probe diameter. This facilitates standard, attuned action. If this is not the case, special calibration is necessary.
It is crucial to make a distinction between superior performance eddy-current sensors and cheap inductive sensors. Most of the simple inductive sensors available on the market are basic equipments. These include cheap proximity switches and a lot more. Proximity sensors are known to be quite beneficial for crucial automation applications. Numerous models under this category are available online. However, it is important to research well prior to deciding on one because most of the commercially available models are not ideal and accurate for crucial metrology industrial applications.
Eddy-current sensors are widely utilized in accurate displacement measurement applications. These are also widely utilized for metrology applications. Most of these sensors are popular for their complicated electronic designs in order to carry out highly complex arithmetical algorithms. These are different from cheap sensors available on the market. These are highly performance oriented sensors and offer linear outputs. The sensors are also appreciated for their stability with temperature. Eddy current sensors are fully capable of resolving amazingly minute alterations in target position. This results in high resolution and precision measurements.
Benefits of Eddy-Current Sensor
Eddy current sensors are simply superb. These are known to be the best devices invented under the category of noncontact sensor technologies including laser, optical, and a lot more.
Here is a list of advantages of Eddy Current Sensor:
•    High tolerance of polluted and dirty environments
•    Not sensitive to substance in the gap connecting the probe and target
•    Cost effective and smaller as compared to laser interferometers
•    Less expensive as compared to capacitive sensors available on the market
Eddy current sensors can be an ideal choice for your industrial applications. Choose one that ideally fits into your organizational requirements and budget.

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