Germany DR MENNICKEN sensor DR MENNICKEN model DR MENNICKEN price

DR MENNICKEN sensor is a device that converts mass signals into measurable electrical signal outputs. When using sensors, the actual working environment of the sensor should be considered first. This is crucial for the correct selection of load cells, as it affects whether the sensor can operate normally, its safety and service life, and even the reliability and safety of the entire weighing system. There are qualitative differences between the old and new national standards in the basic concepts and evaluation methods of the main technical indicators of load cells. The main types include S type, cantilever type, spoke type, plate ring type, capsule type, bridge type, column cylinder type, and several other styles.

DR MENNICKEN sensor detection principle

Detection is performed by detecting magnetic losses caused by eddy currents generated on the surface of a conductor under the influence of an external magnetic field. This method involves generating an AC magnetic field within a detection coil and detecting impedance changes caused by eddy currents produced in the metallic object being detected. Additionally, other methods include aluminum detection sensors that detect frequency phase components, and all-metal sensors that detect only impedance change components through the operating coil. On the surfaces of the detected object side and the sensor side, a transformer state occurs.

DR MENNICKEN sensor classification

1) Capacitive proximity sensor: It is a capacitive proximity switch with an electrode as the detection terminal, composed of a high-frequency oscillation circuit, detection circuit, amplification circuit, shaping circuit, and output circuit. Normally, there is a certain capacitance between the detection electrode and the ground, which becomes part of the oscillation circuit. When the detected object approaches the detection electrode, the detection electrode, being voltage-biased, undergoes polarization due to electrostatic induction. The closer the object gets to the detection electrode, the more induced charge accumulates on the electrode. Since the electrostatic capacitance of the detection electrode is C, the capacitance C of the detection electrode increases as the charge increases. Because the oscillation frequency of the oscillation circuit is inversely proportional to the capacitance, when the capacitance C increases, the oscillation weakens or even stops. These two states, oscillation and non-oscillation, are converted by the detection circuit into switch signals for output. 2) Inductive proximity sensor: Composed of a high-frequency oscillation circuit, detection circuit, amplification circuit, shaping circuit, and output circuit. The sensitive element for detection is the detection coil, which is part of the oscillation circuit. The oscillation frequency of the circuit is . When AC current passes through the detection coil, an alternating magnetic field is generated around it. When a metal object approaches the detection coil, eddy currents are generated in the metal object, absorbing magnetic energy and causing changes in the inductance L of the detection coil. This reduces the oscillation frequency of the circuit, potentially stopping oscillation. These two states, oscillation and non-oscillation, are converted by the monitoring circuit into switch signal outputs. Note: Similar to capacitive proximity sensors, inductive proximity sensors detect metallic conductors; non-metallic conductors cannot be measured using this method. Amplitude changes vary with the type of metal in the target object, so the detection distance also varies with the metal type. 3) Photoelectric proximity sensor: The beam axis of the light-emitting diode (or semiconductor laser tube) and the axis of the phototransistor lie in the same plane and form a certain angle, intersecting at a point in front of the sensor. When the surface of the detected object approaches the intersection point, the reflected light from the LED is received by the phototransistor, generating an electrical signal. When the object moves away from the intersection point, the reflection area falls outside the viewing angle of the phototransistor, and the detection circuit produces no output. Generally, the drive current supplied to the LED is not DC but AC of a specific frequency. Thus, the receiving circuit also receives an AC signal of the same frequency. Filtering the received signal to allow only signals of the same frequency to pass effectively prevents interference from other stray light and can increase the luminous intensity of the LED.

DR MENNICKEN sensor applications

Proximity sensors are mainly used to detect object displacement and are widely applied in aviation, aerospace technology, and industrial production. In daily life, they are used in automatic doors and automatic heaters in hotels, restaurants, and garages. For security and anti-theft purposes, important locations such as archives, accounting departments, financial institutions, museums, and vaults are typically equipped with anti-theft devices composed of various proximity switches. In measurement technology, they are used for length and position measurements; in control technology, they are extensively used for measuring and controlling displacement, speed, and acceleration.

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