German Crydom sensors Crydom models Crydom prices

Crydom sensor pressure sensor for level measurement. The static pressure submersible level transmitter (level gauge) is based on the principle that the static pressure of the measured liquid is proportional to the height of the liquid. It uses advanced foreign isolated diffused silicon sensitive elements or ceramic capacitive pressure sensitive sensors to convert static pressure into electrical signals, which are then converted into standard electrical signals (generally 4~20mA/15VDC) after temperature compensation and linear correction.

Crydom sensor industry applications

Torque sensors are precision measuring instruments for measuring various torques, rotational speeds, and mechanical power. They have a wide range of applications, mainly used for: 1) Detection of output torque and power of rotating power equipment such as motors, engines, and internal combustion engines; 2) Detection of torque and power of fans, water pumps, gearboxes, and torque wrenches; 3) Detection of torque and power in railway locomotives, automobiles, tractors, aircraft, ships, and mining machinery; 4) Can be used for detection of torque and power in sewage treatment systems; 5) Can be used to manufacture viscometers; 6) Can be used in process industries and flow industries; 7) Can be applied in laboratories, testing departments, as well as production monitoring and quality control. 1) Detection of output torque and power of rotating power equipment such as motors, engines, and internal combustion engines; 2) Detection of torque and power of fans, water pumps, gearboxes, and torque wrenches; 3) Detection of torque and power in railway locomotives, automobiles, tractors, aircraft, ships, and mining machinery; 4) Can be used for detection of torque and power in sewage treatment systems; 5) Can be used to manufacture viscometers; 6) Can be used in process industries and flow industries; 7) Can be applied in laboratories, testing departments, as well as production monitoring and quality control;

Crydom sensor classification

1) Non-contact torque sensors In non-contact torque sensors, the input shaft and output shaft are connected by a torsion bar. The input shaft has splines, and the output shaft has keyways. When the torsion bar twists under the torque from the steering wheel, the relative position between the splines on the input shaft and the keyways on the output shaft changes. The change in relative displacement between the splines and keyways equals the twist of the torsion bar, causing a change in magnetic flux density on the splines. This change in magnetic flux density is converted into a voltage signal through coils. Due to their non-contact operation, non-contact torque sensors have long service life, high reliability, are less prone to wear, have smaller delays, and are less affected by shaft deflection and axial offset. They are widely used in the passenger car sector. Common types of non-contact torque sensors include strain gauge, magneto-electric, fiber optic, and photoelectric sensors. Strain gauge non-contact sensors utilize wireless transmission technology. With advancements in technology and wireless transmission, the conductive slip rings and brush arms used for output signals in contact strain gauge sensors can now be replaced by wireless transmission modules, overcoming wear between slip rings and brush arms and improving measurement accuracy. Magneto-electric torque sensors use the principle of magneto-electric conversion, analyzing the phase difference of electromotive force signals from two outputs to measure torque. They are mainly divided into closed magnetic circuit sensors and open magnetic circuit sensors. Fiber optic torque sensors primarily use light reflection and phase difference principles. They read light signals reflected from two corresponding positions on the shaft and calculate the phase difference to determine the torque value. However, fiber optic sensors are susceptible to environmental influences, and installation and debugging are relatively difficult. Photoelectric torque sensors use photoelectric sensing elements as core components. When torque is applied to the drive shaft, the intensity of light emitted by the source changes accordingly, causing a change in the output current of the photoelectric element. Measuring this change allows calculation of the torque value. [3] 2) Strain gauge torque sensors Strain gauge sensors use strain electrical measurement technology for torque measurement. Strain gauges are bonded to the elastic shaft to form a measurement bridge. When the elastic shaft undergoes slight deformation due to torque, the resistance of the bridge changes. This change in resistance is converted into an electrical signal change, thereby achieving torque measurement. The sensor performs the following information conversion; it consists of an elastic shaft, measurement bridge, instrumentation amplifier, and interface circuit. 3) High-performance wireless sensors High-performance wireless torque sensors combine sensors with wireless communication technology to achieve wireless data transmission. The torque electrical signal is amplified and undergoes A/D conversion by a microcontroller-controlled signal processing circuit. An encoder encodes the collected digital quantity and transmits it to the transmission module. After the receiving module receives the data, a decoder sends the decoded data to the microcontroller, which displays the obtained torque data value via LED. The sensor data acquisition and transmission circuit consists of the torque sensor, signal processing part, microcontroller, and wireless transmission circuit. The torque sensor transmits the strain electrical signal generated by the resistance strain gauge to the signal processing circuit. The signal processing part extracts and amplifies the sensor's analog signal and performs analog-to-digital conversion. The microprocessor controls the operation of various components in the system and processes digital signals. Under the control of the microprocessor, the wireless transmission circuit encodes and processes the collected information data using an encoder and transmits it via the transmission module, achieving wireless transmission. 4) Electronic sensors Electronic torque meters are portable, high-performance shaft power measuring instruments designed for fan and water pump testing and on-site energy efficiency evaluation. Electronic torque meters creatively eliminate the cumbersome, complex, and often difficult installation process of traditional electromechanical torque sensors in many field environments. They enable real-time measurement of fan and water pump motor efficiency, monitor the operating status of fans and water pump motors during use, and provide real-time, authentic, and reliable data for studying the usage status of fans and water pump motors. This avoids the impact of improper installation of electromechanical torque sensors on test results. Electronic torque meters can completely replace the shaft power measurement function of traditional torque sensors and obtain the real-time efficiency of fan and water pump motors, providing a rigorous and scientific evaluation method for energy saving in fan and water pump units.

Crydom sensor usage precautions

1) During installation, do not operate while energized. Do not directly strike or collide with the sensor. 2) Tighten the coupling's fastening bolts. Add a protective cover to the outside of the coupling to avoid personal injury. 3) The signal line output must not be grounded or short-circuited to the power supply. The output current must not exceed 10mA. The shield layer of the shielded cable must be connected to the common terminal (power ground) of the +15V power supply. 4) In daily metrological verification and calibration work, torque sensors are usually calibrated using torque standard machines. Since torque sensors have high accuracy, typically Class 1 and above, another important factor affecting measurement results, besides the uncertainty of the torque standard machine itself, is the connection quality between the sensor and the torque standard machine. Especially in the calibration of high-precision torque sensors, when not considering the uncertainty of the torque standard machine itself, the quality of the connection directly affects the accuracy of the measurement result. In existing torque sensor measurement methods, sensors are usually connected in series with the torque standard machine for calibration, so issues regarding the reliability of connection quality inevitably arise during calibration. In the past, to ensure the stability and firmness of the connection installation, rigid connections were typically used. This method brings many inconveniences to inspectors during assembly and disassembly. Additionally, due to the machining precision of parts and the existence of fit clearances, the coaxiality between the measurement shaft systems changes significantly during actual measurement, seriously affecting the accuracy of the measurement results. Although this defect can be reduced by laser alignment devices, due to various influencing factors and differences in manual installation skills, coaxiality remains a major uncertainty factor in the metrological process during actual loading of the torque sensor.

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