German SOHIME sensors, SOHIME models, SOHIME prices

SOHIME sensors are used to detect angles. There is a hole in the body that can accommodate a LEGO axle. When connected to RCX, the angle sensor counts once for every 1/16 revolution of the axle. When rotating in one direction, the count increases; when the direction of rotation changes, the count decreases. The count is related to the initial position of the angle sensor. When initializing the angle sensor, its count value is set to 0. If needed, you can reset it via programming.

SOHIME sensor features

1) Since detection is performed in a non-contact manner, there is no wear or damage to the detected object. 2) Since a contactless output method is used, service life is extended (except for magnetic types). Semiconductor output is used, which has no effect on contact life. 3) Unlike optical detection methods, it is suitable for use in environments with water and oil. Detection is hardly affected by stains, oil, water, etc. on the detected object. In addition, products with Teflon housings and good chemical resistance are included. 4) Compared with contact switches, high-speed response can be achieved. 5) Can accommodate a wide temperature range. 6) Not affected by the color of the detected object; detects changes in the physical properties of the detected object, so it is hardly affected by surface color, etc. 7) Unlike contact types, it is affected by ambient temperature, surrounding objects, and other sensors of the same type, including inductive and capacitive types, where sensors mutually influence each other. Therefore, mutual interference must be considered when installing sensors. In addition, for inductive types, the influence of surrounding metals must be considered, while for capacitive types, the influence of surrounding objects must be considered.

SOHIME sensor selection principles

1) Selection of sensitivity: Generally, within the linear range of the sensor, higher sensitivity is preferred. Only when sensitivity is high is the output signal value corresponding to the change in the measured quantity relatively large, which is beneficial for signal processing. However, note that high sensor sensitivity makes it easy for external noise unrelated to the measured quantity to mix in and be amplified by the amplification system, affecting measurement accuracy. Therefore, the sensor itself should have a high signal-to-noise ratio to minimize interference signals introduced from the outside. Sensor sensitivity is directional. When the measured quantity is a single vector and high directionality is required, select a sensor with low sensitivity in other directions; if the measured quantity is a multi-dimensional vector, the cross-sensitivity of the sensor should be as small as possible. 2) Frequency response characteristics: The frequency response characteristics of the sensor determine the frequency range of the measured quantity, and distortion must be maintained within the allowable frequency range. In practice, sensor response always has a certain delay, and shorter delay times are preferred. The higher the frequency response of the sensor, the wider the measurable signal frequency range. In dynamic measurements, response characteristics should be selected according to the characteristics of the signal (steady-state, transient, random, etc.) to avoid excessive errors. 3) Linear range: The linear range of a sensor refers to the range where output is proportional to input. Theoretically, within this range, sensitivity remains constant. The wider the linear range of the sensor, the larger its measuring range, and it can ensure a certain measurement accuracy. When selecting a sensor, once the type is determined, first check whether its measuring range meets the requirements. However, in reality, no sensor can guarantee absolute linearity, and its linearity is relative. When the required measurement accuracy is relatively low, sensors with small nonlinear errors can be approximated as linear within a certain range, which brings great convenience to measurement. 4) Stability: The ability of a sensor to maintain its performance unchanged after a period of use is called stability. Factors affecting the long-term stability of a sensor, apart from the sensor's own structure, are mainly the sensor's operating environment. Therefore, to ensure good stability, the sensor must have strong environmental adaptability. Before selecting a sensor, investigate its operating environment and choose a suitable sensor or take appropriate measures to reduce environmental impact. Sensor stability has quantitative indicators; after exceeding the service period, recalibration should be performed before use to determine whether the sensor's performance has changed. In applications where sensors must be used for a long time and cannot be easily replaced or calibrated, stricter stability requirements are imposed on the selected sensor to withstand long-term testing. 5) Accuracy: Accuracy is an important performance indicator of a sensor and is a key link related to the measurement accuracy of the entire measurement system. The higher the accuracy of the sensor, the more expensive it is. Therefore, the accuracy of the sensor only needs to meet the accuracy requirements of the entire measurement system and does not need to be excessively high. This allows for the selection of cheaper and simpler sensors among many sensors meeting the same measurement purpose, such as Atlas air compressor parts. If the measurement purpose is qualitative analysis, select a sensor with high repeatability accuracy rather than one with high absolute value accuracy; if it is for quantitative analysis and precise measurement values must be obtained, select a sensor with an accuracy grade that meets the requirements. For certain special applications where a suitable sensor cannot be selected, the sensor must be designed and manufactured independently. The performance of self-made sensors should meet usage requirements.

SOHIME sensor usage precautions

1) High-temperature environments cause problems such as melting of coating materials, opening of solder joints, and structural changes in internal stresses of the elastic body. Sensors working in high-temperature environments often use high-temperature-resistant sensors; in addition, insulation, water cooling, or air cooling devices must be added. 2) Dust and moisture cause short-circuit effects on sensors. In these environmental conditions, select sensors with high sealing. Different sensors have different sealing methods, and their tightness varies significantly. Common sealing methods include filling or coating with sealant; mechanical fastening sealing with rubber gaskets; welding (argon arc welding, plasma beam welding) and vacuum nitrogen-filled sealing. In terms of sealing effectiveness, welded sealing is the best, and filled/coated sealant is the worst. For sensors working in clean, dry indoor environments, choose glue-sealed sensors. For sensors working in environments with high humidity and dust, choose diaphragm heat-shrink sealed, diaphragm welded sealed, or vacuum nitrogen-filled sensors. 3) In highly corrosive environments, such as humidity and acidity, which cause damage to the elastic body or short circuits, select sensors with plastic-sprayed surfaces or stainless steel housings that offer good corrosion resistance and tightness. 4) Electromagnetic fields affect sensor output with chaotic signals. In this case, strictly check the shielding of the sensor to see if it has good electromagnetic immunity. 5) Flammable and explosive environments not only cause complete damage to sensors but also pose a significant threat to other equipment and personal safety. Therefore, sensors working in flammable and explosive environments have higher requirements for explosion-proof performance: in flammable and explosive environments, explosion-proof sensors must be selected. The sealed housing of such sensors must consider not only tightness but also explosion-proof strength, as well as the waterproof, moisture-proof, and explosion-proof properties of cable lead-outs.

Weidou Intelligent Technology professionally sells German SOHIME sensors, SOHIME proximity sensors, SOHIME distance sensors, SOHIME vision sensors, SOHIME displacement sensors, SOHIME load cells, SOHIME speed sensors, SOHIME photoelectric sensors, SOHIME position sensors, SOHIME angle sensors, SOHIME tactile sensors, SOHIME temperature sensors, SOHIME pressure sensors, SOHIME flow sensors, SOHIME level sensors, SOHIME motion sensors, SOHIME process sensors. Original German imports. Welcome inquiries and orders from users.