What do inductive sensors detect?
An inductive sensor is an electronic device that can detect ferrous metal targets without physical contact. Inductive sensors will also detect non-ferrous metal targets like aluminum, brass, and copper.
What is an inductive sensor used for?
An Inductive sensor is used to measure position . They are usually used within harsh environments as they are generally robust and can deliver stable signals even in hostile environments.
What is the working principle of inductive proximity sensor?
Inductive Proximity Sensors detect magnetic loss due to eddy currents that are generated on a conductive surface by an external magnetic field. An AC magnetic field is generated on the detection coil, and changes in the impedance due to eddy currents generated on a metallic object are detected.
How does a 2 wire inductive sensor work?
2 wire DC: These sensors contain an output amplifier with the function N.O. or N.C. that can pilot a load connected in series. In this system a residual current flows through the load even when in the open state and a voltage drop occurs to the sensor when it is in the closed state.
How does a two wire proximity sensor work?
Unlike a mechanical switch, a two-wire sensor as an active component requires voltage and current at all times. This means that even when closed, a non-negligible voltage, missing from the connected load, drops across the sensor. When open, a current flows through the sensor and the connected load.
Do inductive sensors work on stainless steel?
Inductive sensors are designed for the detection of metal targets at close range and are a popular choice for use as proximity switches in factory automation applications. Carbon steel is the typical target material for these sensors, but in some industries, stainless steel is more common.
How do you test an inductive sensor?
Unplug the sensor and check that the electrical resistance of the inductive coil is roughly between 500 ohms and 1.500 ohms. If the reading value is drastically different, including zero or infinite, replace the sensor.
Can inductive sensors detect aluminum?
These sensors have an equal range for aluminum and steel targets. In addition, these new inductive sensors have very long nonflush sensing ranges, allowing metals such as aluminum and stainless steel to be sensed at distances previously not possible.
How does a 2 wire proximity sensor work?
Connecting the 2-wire sensor can be done by merely connecting the blue wire to the input and the brown wire to the 24V source. The process is the same for replacing a NPN 3-wire sensor. In this case you would just connect the brown wire to the input and the blue wire to the ground of your power supply.
How do inductive transducers work?
Inductive Transducers. Inductive transducers work on the principle of inductance change due to any appreciable change in the quantity to be measured i.e. measured. For example, LVDT , a kind of inductive transducers, measures displacement in terms of voltage difference between its two secondary voltages.
How does an inductive proximity switch work?
Inductive proximity switches sense distance to objects by generating magnetic fields. They are similar in principle to metal detectors. A coil of wire is charged with electrical current, and an electronic circuit measures this current.
What are proximity sensors and how do they work?
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation, and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor’s target. Different proximity sensor targets demand different sensors. For example, a capacitive proximity sensor or photoelectric sensor might be suitable for a plastic targe