German Kronenberg sensors Kronenberg models Kronenberg prices

Kronenberg sensors are devices or units that can sense pressure signals and convert them into usable output electrical signals according to a certain rule. Pressure sensors typically consist of a pressure-sensitive element and a signal processing unit. Depending on the type of test pressure, pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors. Pressure sensors are one of the most commonly used sensors in industrial practice, widely applied in various industrial automation control environments, involving numerous industries such as water conservancy and hydropower, railway transportation, smart buildings, production process control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, and pipelines.

Kronenberg sensor classification

1) Potentiometric displacement sensors convert mechanical displacement into resistance or voltage output with a linear or arbitrary functional relationship. Ordinary linear potentiometers and circular potentiometers can be used as linear displacement and angular displacement sensors, respectively. However, potentiometers designed for displacement measurement require a definite relationship between displacement change and resistance change. The movable wiper of the potentiometric displacement sensor is connected to the measured object. The displacement of the object causes a change in resistance at the moving end of the potentiometer. The amount of resistance change reflects the magnitude of the displacement, while the increase or decrease in resistance indicates the direction of displacement. Typically, a supply voltage is applied to the potentiometer to convert the resistance change into a voltage output. Due to the stepwise change in resistance based on turn resistance when the wiper moves, wire-wound potentiometers exhibit a stepped output characteristic. If such a displacement sensor is used as a displacement feedback element in a servo system, excessive step voltage may cause system oscillation. Therefore, the resistance value per turn should be minimized during potentiometer manufacturing. Another major disadvantage of potentiometric sensors is their susceptibility to wear. Their advantages include simple structure, large output signal, ease of use, and low cost. 2) Magnetostrictive displacement sensors precisely detect the absolute position of a moving magnetic ring using non-contact measurement technology to determine the actual displacement of the product being measured; the high precision and reliability of these sensors have been widely demonstrated in thousands of practical applications. Since the moving magnetic ring determining the position does not directly contact the sensitive element, the sensor can be used in extremely harsh industrial environments and is less affected by oil stains, solutions, dust, or other contaminants, with an IP protection rating of IP67 or higher. Furthermore, the sensor utilizes advanced materials and electronic processing technologies, allowing it to operate in high-temperature, high-pressure, and high-vibration environments. The sensor output is an absolute displacement value; even if power is interrupted and reconnected, data is not lost, and re-zeroing is unnecessary. As the sensitive element is non-contact, repeated detection does not cause any wear to the sensor, significantly improving detection reliability and service life. Magnetostrictive displacement sensors utilize the magnetostrictive principle, generating a strain pulse signal through the intersection of two different magnetic fields to accurately measure position. The measuring element is a waveguide, with the sensitive element inside made of special magnetostrictive material. The measurement process involves generating a current pulse in the sensor's electronics chamber, which travels through the waveguide, creating a circumferential magnetic field outside the waveguide. When this magnetic field intersects with the magnetic field generated by the moving magnetic ring sleeved on the waveguide (which changes with position), a strain mechanical wave pulse signal is generated within the waveguide due to the magnetostrictive effect. This strain mechanical wave pulse signal travels at a fixed speed of sound and is quickly detected by the electronics chamber. Since the transmission time of this strain mechanical wave pulse signal within the waveguide is proportional to the distance between the moving magnetic ring and the electronics chamber, measuring the time allows for highly precise determination of this distance. Because the output signal is a true absolute value, rather than a proportional or amplified signal, there is no signal drift or value variation, and regular recalibration is not required. Magnetostrictive displacement sensors are high-precision, long-stroke absolute position measurement displacement sensors manufactured based on the magnetostrictive principle. They employ a non-contact measurement method; since the moving magnetic ring used for measurement does not directly contact the sensor itself, friction and wear are avoided, resulting in long service life, strong environmental adaptability, high reliability, good safety, and ease of integration into automated systems. Even in harsh industrial environments, they can operate normally. Additionally, they can withstand high temperatures, high pressures, and strong vibrations, and are now widely used in the measurement and control of mechanical displacement.

Kronenberg sensor working principle

Magnetostrictive displacement (level) sensors utilize the magnetostrictive principle, generating a strain pulse signal through the intersection of two different magnetic fields to accurately measure position. The measuring element is a waveguide, with the sensitive element inside made of special magnetostrictive material. The measurement process involves generating a current pulse in the sensor's electronics chamber, which travels through the waveguide, creating a circumferential magnetic field outside the waveguide. When this magnetic field intersects with the magnetic field generated by the moving magnetic ring sleeved on the waveguide (which changes with position), a strain mechanical wave pulse signal is generated within the waveguide due to the magnetostrictive effect. This strain mechanical wave pulse signal travels at a fixed speed of sound and is quickly detected by the electronics chamber. Since the transmission time of this strain mechanical wave pulse signal within the waveguide is proportional to the distance between the moving magnetic ring and the electronics chamber, measuring the time allows for highly precise determination of this distance. Because the output signal is a true absolute value, rather than a proportional or amplified signal, there is no signal drift or value variation, and regular recalibration is not required.

Kronenberg sensor application areas

Widely applicable for level measurement and control of various liquid tanks in industries such as petroleum, chemical, water conservancy, pharmaceuticals, food, and beverages, as well as in aerospace refueling systems, automotive refueling systems, diesel refueling systems, various hydraulic tanks, hydrological monitoring, and water treatment. Magnetostrictive displacement sensors are high-precision, long-stroke absolute position measurement displacement sensors manufactured based on the magnetostrictive principle. They employ an internal non-contact measurement method; since the moving magnetic ring used for measurement does not directly contact the sensor itself, friction and wear are avoided, resulting in long service life, strong environmental adaptability, high reliability, good safety, and ease of integration into automated systems. Even in harsh industrial environments (such as those prone to oil stains, dust, or other contamination), they can operate normally [01]. Additionally, they can withstand high temperatures, high pressures, and strong vibrations, and are now widely used in the measurement and control of mechanical displacement. Their stroke can reach 3 meters or longer, with a nominal accuracy of 0.05% F·S. For sensors with a stroke of 1 meters or more, the accuracy can reach 0.02% F, S, and repeatability can reach 0.002% F·S. Therefore, they are widely used in industries such as petrochemicals, aerospace, electric power, and water conservancy.

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