German KTR sensors, KTR models, KTR prices

KTR pressure sensors for liquid level measurement. Submersible static pressure level transmitters (level gauges) operate on the principle that the static pressure of the measured liquid is proportional to its height. They use advanced imported isolated diffused silicon sensitive elements or ceramic capacitive pressure sensitive sensors to convert static pressure into electrical signals. These signals undergo temperature compensation and linear correction to become standard electrical signals (typically 4 to 20mA/15VDC).

KTR sensor classification

1) Laser speed measurement: With the rise of precision manufacturing and the need for cost savings, non-contact speed sensors are gradually replacing contact speed sensors. The most common and high-precision non-contact laser speed sensors currently on the market are ZLS-Px aberration speed sensors. Aberration speed sensors have two ports: an emission port that emits a LED light source, and a high-speed photography port that achieves high-speed imaging comparison over a CCD area. By comparing images taken at two points in time within an extremely short interval, the distance moved by the object is determined. Combined with internal algorithms, the sensor outputs the object's speed in real time. As shown in the figure: (1) LED light emission port, (2) camera reception port, (3) and (4) terminal blocks, (5) mounting screw holes. (1) The LED light emission port directs laser light at the target object; after reflection, it reaches the (2) camera reception port. Upon receiving the signal, it is transmitted to the signal processor, which calculates the speed using algorithms. The ZLS-Px aberration speed sensor can simultaneously measure speed and length in two directions. It not only detects whether the object has stopped but also identifies its direction of motion. Mount the sensor on a stable bracket to ensure that excessive vibration does not occur during the rotation of the object, allowing accurate measurement of the rotational angle and speed of the rotating object. 2) Radar speed measurement: Traditional speed measurement mostly involves rotational or linear motion speed. However, industrial automation often requires irregular speed measurements, such as athlete speed, traffic vehicle speed, and golf ball speed. Radar speed sensors can meet these requirements.

KTR sensor operating principle

Transmissive speed sensors consist of a slotted or notched disk, a light source, and a phototube. When the disk rotates with the measured shaft, light passes through the holes or notches to illuminate the phototube. When illuminated, the phototube's reverse resistance drops significantly, outputting an electrical pulse signal. When the disk blocks the light source, the phototube's reverse resistance becomes very high, resulting in no output signal. Thus, based on the number of holes or notches on the disk, the rotational speed of the shaft can be measured. The usual number of disk holes or notches is unclear in the source, so each revolution of the shaft generates 60 pulse signals from the photoelectric converter. If the time base signal of the electronic counter is set to 1s, the shaft speed can be read directly. The principle of reflective speed sensors is similar to transmissive ones, converting changes in received light into electrical signals via a phototube, but they obtain pulse signals through light reflection. Typically, reflective material is applied to the measurement area of the shaft to create a reflective surface. Common reflective materials include dedicated speed-measuring reflective tape; aluminum foil or other reflective materials can also be used. Sometimes, white paint is applied to the measurement area as a reflective surface. The projector and reflective surface must be properly aligned, typically with a distance of 5-15M between them. As the shaft rotates, the photoelectric element receives pulsed light and outputs corresponding electrical signals to an electronic counter, thereby measuring the shaft speed. The waveform of the output signal from photoelectric speed sensors is relatively regular, close to a standard square wave, with almost no interference. However, vibration in transmissive types can reduce the lifespan of the light source, making them unsuitable for high-vibration environments. Reflective types have no mechanical connection with the measured shaft, offering ease of use.

KTR sensor industry applications

1) Modern vehicles are generally equipped with engine control, autonomous driving, ABS, TRC, automatic door locking, active suspension, guidance systems, electronic instruments, and other devices, all of which require vehicle speed signals. Therefore, the accuracy and stability of the output signals from speed sensors greatly impact these control units. Automotive speed sensors often use Hall-effect structures. A Hall speed sensor is a magnetoelectric sensor based on the Hall effect, characterized by high magnetic field sensitivity, stable output signals, high frequency response, strong anti-electromagnetic interference capability, simple structure, and ease of use. It mainly consists of permanent magnets with specific pole pairs (typically 4 or 8 pairs), Hall elements, a rotating mechanism, and input/output connectors. Its working principle is that when the sensor's rotating mechanism is driven externally, it rotates the permanent magnet, causing periodic changes in the magnetic field passing through the Hall element. This induces voltage changes in the Hall element, which are processed by subsequent circuits to form stable pulse voltage signals as the output of the speed sensor. Key electrical technical parameters for Hall-structure speed sensors include high/low output voltage, duty cycle, period, rise time, fall time, and pulses per cycle. To ensure product performance and reliability, these parameters must be quantitatively tested before factory shipment. Test systems featuring integration and intelligence, efficient automated measurement, software calculation, and graphical or tabular display of results are increasingly favored by automotive speed sensor manufacturers. A comprehensive testing device has been developed for measuring the performance of common Hall-effect vehicle speed sensors. Considering cost, the high-speed counter port of a microprocessor is used for data acquisition from the speed sensor, while software controls the calculation and graphical display of the collected data. The completed testing device offers advantages such as high test accuracy, reliable data communication, a user-friendly graphical interface, strong anti-interference capability, simple and intuitive testing processes, and low system development costs. It has good market promotion potential, indicating significant application prospects for speed sensors in vehicle speed detection. 2) Speed sensors for belt conveyors use Hall sensors, which utilize the Hall effect for magnetoelectric conversion. The Hall effect was discovered in 1879 and has over 100 years of development history. However, its application gained attention and widespread adoption in the 50s of this century due to the rapid development of microelectronics, leading to the continuous development of various Hall elements. China began increasing research on Hall elements in the 20s of the 70 century. After decades of research and development, various types of Hall elements can now be produced, including standard, high-sensitivity, low-temperature-coefficient, temperature/magnetic-field sensing, and switching types. Due to their high sensitivity, good linearity, high stability, small size, and high-temperature resistance, Hall sensors are widely used in non-electrical measurement, automatic control, computer devices, modern military technology, and other industrial fields.

Weidou Intelligent Technology specializes in selling German KTR sensors, KTR proximity sensors, KTR distance sensors, KTR vision sensors, KTR displacement sensors, KTR torque sensors, KTR speed sensors, KTR photoelectric sensors, KTR position sensors, KTR angle sensors, KTR tactile sensors, KTR temperature sensors, KTR pressure sensors, KTR flow sensors, KTR level sensors, KTR motion sensors, and KTR process sensors. All products are original imports from Germany. Customers are welcome to inquire and place orders.