Xian Ruijia Measurement Instruments Co., Ltd is a professional manufacturer of sensors in state-level high-tech industry development zone, Xi’an of China. Since 2005, We focused on development and production of pressure sensor, weighing sensor etc. Xian ruijia have first-class technical team, with strong R & D capability and rich experience in production management. In the production line, we have the most advanced and completed sets of equipment to ensure product quality and reliability. Xian ruijia brings together the top professional talents and technology. The software and hardware of our advanced testing equipment designed by our professional and technical personnel. We have obtained several utility medel patents from National Patent Office. We provide customers with affordable, high-quality products. In order to achieve the advantages of Asia, the full benefit in terms of quality and cost, procurement of key components from Germany and the United States, and the production and manufacturing in China. We have the best supply chain in China and parts manufacturers, and a solid record of quality and innovation, to prove that our many years performance of the sensor. Quality product performance and good reputation, our products are not only successful sales in China, and have been exported to more than 50 countries and regions in the world, including: Germany, Japan, Italy, Russia, Japan, South Korea, Turkey, Brazil , India, the United Arab Emirates, Saudi Arabia and other countries, the products are subject to a great welcome and praise. Looking forward to the future, the company is moving into the fast lane of development and will continue to adhere to the concept of creating quality products to serve global customers. Our mission is to be the most valuable and competitive automotive sensors in the world.

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Working principle of weighing sensor 2025-07-18 Working principle of weighing sensor A weighing sensor is actually a device that converts a mass signal into a measurable electrical signal output. When using sensors, the actual working environment in which the sensor is located should be considered first, which is crucial for the correct selection of weighing sensors. It is related to whether the sensor can work normally, its safety and service life, and even the reliability and safety of the entire weighing apparatus. There are qualitative differences between the new and old national standards in the basic concepts and evaluation methods of the main technical indicators of weighing sensors. There are several styles available, including S-shaped, cantilever, spoke, plate ring, film box, bridge, and cylindrical. Sensors generally use voltage excited resistance bridge structure sensors, which are related to constant voltage (current) output voltage and linearity.The weighing sensor is mainly composed of elastic beams, strain gauges, adhesives, etc. When an external force acts on the sensor, the elastic beam of the sensor will deform, causing the strain gauges attached to the elastic beam adhesive to act. In the measurement circuit composed of the strain gauges, a certain amount of electricity will be output under the corresponding excitation voltage. A typical electronic scale weighing sensor bridge typically uses a 300fl resistor. The basic lead terminals of the four terminal sensor are VIN+, VOUT+or S+, VIN or E -, VOUT - or S -. The basic lead terminals of the six terminal sensor are+FORCE,+SENSE,+VO, - VO, - SENSE, - FORCE The excitation power terminal of the sensor is generally connected in series with a temperature compensation resistor and a zero point compensation resistor. The elastic body of the sensor is made of metal material and pasted on the surface of the strain sensitive area Four strain gauges, R1, R2, R3, and R4, form a Wheatstone bridge. When subjected to an external force F, Elastic deformation causes strain gauges R1 and R3 to be stretched, resulting in an increase in resistance value; R2 and R4 are compressed, electrically The decrease in resistance causes the bridge to lose balance and output a voltage signal proportional to the external force F. The measuring bridge has high sensitivity, wide measurement range, simple circuit structure, and high accuracy Easy to achieve temperature compensation and other advantages, therefore it can well meet the requirements of strain measurement.

How to use a multimeter to measure the quality of a weighing sensor 2025-07-18 How to use a multimeter to measure the quality of a weighing sensor 1. The sensor manufacturer provides the sensor output sensitivity and power supply voltage at the factory, and we detect the sensor output signal based on these two parameters. The strain gauge weighing force sensor outputs an analog signal in millivolts. For example, the sensor output sensitivity is 2.0mV/V, and the power supply voltage is DC10V. These two parameters can provide us with a linear relationship between the sensor excitation working voltage requiring DC10V and the sensor output signal corresponding to a 2.0mV excitation voltage output for every 1V. For example, if the full range of the sensor is 50KG, then give the sensor a DC10V voltage and output 20mV at full range. Based on this relationship, we use a multimeter mV to measure the sensor output signal. The no-load output of the sensor is 0mV, which is normal. If it is greater than this value, but close to this value, the numerical change indicates that the sensor has zero drift. If the value is large, it indicates that the sensor is damaged or the internal bridge is a circuit with asymmetric bridge arm resistance. 2. Determine whether the sensor strain gauge is damaged based on the sensor parameters provided by the factory, input resistance, and output resistance. The input and output resistance values of sensors vary from manufacturer to manufacturer. So this needs to be tested according to the manufacturer's labeling. Use a multimeter to measure the resistance of the power supply and power ground, as well as the resistance of the signal line and signal ground. If the resistance value is greater than the factory resistance value, it indicates that the sensor has been overloaded and the strain gauge has deformed. If the resistance value is infinite, the sensor strain gauge is severely damaged and cannot be repaired. 3. Due to frequent wire breakage during the use of the sensor, while the outer layer of the protective wire is intact, we visually inspected the integrity of the sensor wire. We used the ohm range of a multimeter to detect the continuity of the sensor wire. If the resistance is infinite, it is certain to break, and if the resistance changes, the contact is poor. The weighing sensor is known as the heart component of electronic scales. With the rapid development of science and technology, electronic scales made from weighing sensors have been widely used in various industries, achieving fast and accurate weighing of materials. Especially with the emergence of microprocessors and the continuous improvement of automation in industrial production processes, weighing sensors have become a necessary device in process control. From the weight measurement of large tanks, hoppers, and other scales that could not be weighed before, as well as the measurement and control systems of crane scales, car scales, etc., to the batching system for mixing and distributing multiple raw materials, automatic detection in production processes, and powder feeding control, weighing sensors have been applied. At present, weighing sensors are almost used in all weighing fields. Here, I will take the example of a faulty weighing sensor to discuss its on-site use and debugging. For fully electronic truck scales, the troubleshooting of various sensor faults should follow these steps; Observation (fault observation) - Analysis (fault cause) - Detection (providing a basis for fault diagnosis or verifying the judgment results) - Repair (repair or replacement) - Calibration (testing its metrological performance after system debugging). According to the actual situation, the following methods can be selected for judgment: visual method, substitution method, comparison method, insertion and extraction method, and code diagnosis method. Let's talk about using a multimeter for detection.

A Brief Discussion on the Five Technical Characteristics of Electronic Hanging Scales 2025-07-18 A Brief Discussion on the Five Technical Characteristics of Electronic Hanging Scales Electronic hanging scales belong to electromechanical integrated equipment. As precision electronic weighing tools, the accuracy of their weighing is very important. Excessive deviation can seriously affect the smooth progress of work. However, it is difficult for any electronic product to achieve 100% accuracy, so there may be certain errors in electronic hanging scales based on the weighing tonnage. Of course, this error should be minimized as much as possible. Equipped with precise weighing capabilities, it can be divided into two types: direct view electronic suspension scales and wireless electronic suspension scales. The accuracy or error range of the hook scale of the electronic hanging scale: First, confirm the acceptable accuracy or error range. A qualified electronic suspension scale can achieve an accuracy of 1/3000-1/6000, which means that when the rated load of the electronic suspension scale is 3000KG, the allowable error is between 0.5KG and 1KG. Of course, the smaller the accuracy, the more expensive the electronic suspension scale will be. Now let's learn about the technical features of electronic suspension scales!The five technical characteristics of electronic hanging scales:1. The electronic hanging scale adopts a high brightness luminous digital tube display, with a character height of 30mm and clear reading within a range of 25 meters.2. The shell of the electronic suspension scale is made of aluminum alloy and all steel, which is sturdy, impact resistant, and more durable.3. The electronic hanging scale adopts high-quality sensors, with * anti vibration microcomputer technology, high-precision integrated MD conversion technology, precise and fast weighing, good reading stability, and short stability time.4. The electronic hanging scale is equipped with a remote control, which has powerful functions such as zero setting, peeling, accumulation, and value maintenance. It can be operated remotely or directly on the scale body, making it easy to use and operate. The distance between the remote control and the scale body can reach 20 meters.5. The battery charging and replacement of the electronic hanging scale are very simple. You can open the back cover of the battery compartment with bare hands, directly remove the battery, and charge the battery without moving the scale body. Simply replace the charged battery and continue to use it. The flexible design makes battery charging more convenient.

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