What is a magnetic sensor and what does it do?

Magnetic sensor (Magnetic sensor) or in other words, "magnet sensor" or in the market term of jack sensor is one of the types of proximity sensors. The basis of a magnetic sensor is to react to a magnetic field around a permanent or electric magnet. These sensors are often used to detect the position of a part without contact with the sensor. These sensors are often used to detect the position of a part without contact with the sensor. In fact, they can detect the position of the parts without making any contact with them.

The material (Magnetic sensor) is a permanent magnet that uses AC or DC currents. They work in such a way that they are affected by a magnetic field and their properties change. In general, when you want to measure physical quantities such as direction, presence or absence, or current, and you want to use magnetic sensors, these quantities must first create a magnetic field or change the magnetic field of the sensor. So that this sensor senses this change and changes it to a suitable current or voltage by a circuit.

What is the use of a magnetic sensor?
 

The magnetic sensor is the same as the jack sensor and is one of its many applications in hydraulic jacks. By mounting on pneumatic jacks, these sensors can detect the position of the jack, or in other words, whether the jack is open or closed. By placing this sensor in the groove in the piston, the piston jack has a magnetic part or ring, and when the jack approaches the sensor, the sensor sends a signal, according to which the jack is approaching the end of the tank and other operations must be performed. Start or slow down. Magnetic sensors have been used for about 2000 years. These sensors are sensitive to magnets (magnets), one of its applications is in navigation and navigation.

Other applications of magnetic sensors include level control in tanks. In this way, magnet sensors are installed vertically at one or more specific points in the tanks without the need for a power supply in the tank. This sensor has a float made of polyamide (or even metal) that is placed on the surface of the liquids in the tank and moves with the liquid. Floating motion along the rod activates the switches inside the rod and activates the output of the device.

In fact, those floats are the same magnet, and when this magnet is placed in front of this sensor, it activates it and generates a signal. This type of level controller (level switch or flow switch) is called level switches. There are many variations in terms of appearance and type of installation. In general, if it is possible to install a permanent magnetic field (permanent magnet) or electric magnetic field on the equipment, the magnetic sensor can be used in many applications, in this section we will mention some of them.

Application of magnetic sensor
-Ability to count devices.
-These sensors can detect whether the doors are open or closed.
-These sensors are also used to control the position of equipment.
-Magnet sensors are used to measure the speed of rotation. (These types of sensors are called pickup sensors)

What is a flow switch or flow switch and what is its use?

Level switches or flow switches are a device for measuring the level of materials from the bottom of tanks to the top of their surface. Level switch or in other words level controller is used to control the level of tanks. They often use simple mechanical mechanisms, and depending on the type of material in the tank, whether liquid or powder, can use capacitive or radar models. The main mechanism of the roll switch is to determine the amount of materials, adjust and control the output connection and connection in the set point or adjustment point. This device has the ability to measure the height of materials such as gasoline, water tanks, silos, liquids and solids in various industries such as food Used in medicine, water and sewage, oil and gas, steel and cement, etc.

Characteristics of magnetic sensor

Since these sensors are non-contact sensors and they do not have any mechanical connection between moving parts and fixed parts, this feature has increased the lifespan of these types of sensors. Magnetic field sensors have a structure that can maintain their performance and work well in contaminated, greasy and oily environments. Proper structure makes them widely used in cars. In a magnetic sensor, sliding moving parts together does not cause noise.

What is the structure of a magnetic sensor?

The main part of this sensor are blade-shaped contacts made of ferromagnetic materials such as iron and nickel alloys. ) Filled. Usually in the building of a magnetic sensor an LED is installed to display the status of the sensor. When a magnetic field approaches the sensor like the magnetic field of a permanent magnet, the blade-shaped contacts open or close the magnetized field absorption and one or more contacts. Magnetic sensors, like induction sensors, have an LC oscillator.

But there is a fundamental difference in their Boeing oscillator core. Inside the induction sensors, the core covers a portion of the boine and directs a magnetic field outwards. Covers and if a magnet approaches this type of sensor, the Buin core of the oscillator is saturated and the saturation of the core causes a change in the oscillator current and this change causes the magnet to be detected by the sensor.

Two-wire magnetic sensors

Two-wire magnetic sensors are usually AC / DC powered and have a two-wire structure. The core of these sensors is a reed relay. The larger the reed relay, the more current can be transmitted through the two wires. In the case of three-wire magnetic sensors with NPN or PNP outputs, the supply voltage is generally DC, and the operating speed of these sensors is much, much higher than that of two-wire types. The main brain of these sensors can be a hall effect sensor. Two-wire types are used in the manufacture of switches. International Electricity and Industry can make different types of switches or different sizes according to customer needs.

What is the difference between a magnetic sensor and an induction sensor?

This sensor depends on detecting magnetic intensity, so its viewing distance and velocity depend on the magnetic power approaching the sensor; Therefore, the operating speed and accuracy of the magnetic sensor are lower than the induction sensor.

As you may have noticed by now, magnet-sensitive sensors, jack sensors and magnetic sensors are all different names for magnetic sensors, which are named after the application or properties of these sensors.