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    Tag: wiki

    What is a Magnetic Stirrer?

    A magnetic stirrer also known as magnetic mixer is a kind of laboratory equipment which is mainly used for stirring or heating stirring in low-viscosity liquid or solid-liquid mixing experiments. A rotating magnetic field is generated under the container plate, and the principle of homosexual repulsion and heterosexual attraction is used to push the magnetic stirring rod in the container to rotate rapidly, thereby achieving the purpose of stirring. The plate usually has a heating function to meet more experimental needs.

    What is a TDS Meter?

    The TDS meter is a kind of water quality tester, which is a small handheld device used to indicate the total dissolved solids in a solution (usually water). Since dissolved ionized solids (such as salts and minerals) increase the conductivity of the solution, the TDS meter can measure the conductivity of the solution and estimate the TDS value based on the measured value. It should be noted that TDS meter does not measure pollutants. Although TDS meter is often used as a water quality testing instrument, it does not directly tell you whether the water is healthy. In fact, some healthy minerals in the water, such as potassium, magnesium, calcium, etc., can cause the TDS meter to suddenly rise. Therefore, using TDS meter for water filters with mineralizers may have the opposite effect to your expectations. Your water may also contain heavy metals such as lead, or other pollutants such as pesticides, drugs, and hexavalent chromium. TDS meter cannot detect these pollutants.

    What is a Hipot Tester?

    Hipot tester, also called dielectric strength tester, is used to carry out the test of applying a specified AC or DC high voltage between the live part and the non-live part of the electric appliance to check the hipot of the insulating material of the electric appliance. In long-term work, electrical appliances must not only bear the effect of rated working voltage, but also bear the effect of overvoltage that is higher than the rated working voltage for a short time during operation(The overvoltage value may be several times higher than the rated working voltage value). Under the action of these voltages, the internal structure of electrical insulating materials will change. When the overvoltage intensity reaches a certain value, it will cause the insulation breakdown of the material. The electrical appliances will not operate normally, and the operator may get an electric shock, endangering personal safety. The main electrical safety test indicators include AC/DC hipot, insulation resistance, leakage current, ground resistance, etc. AC/DC hipot tester is used to test the electrical safety performance of the product under actual working conditions, so it is one of the important instruments for testing the electrical safety performance of the equipment.

    What are the Advantages of BLDC Motor?

    The brushless DC motor is a device that converts electrical energy into mechanical energy. By consuming electrical energy, mechanical energy can be obtained to achieve certain needs. What are the applications of BLDC motors? Brushless DC motors can be used in the small home appliance industry. The most common electric fan is to use brushless DC motors to convert electrical energy into mechanical energy to turn the electric fan, bringing us coolness. In addition, lawn mowers in the garden industry and electric drills in the power tool industry all work with brushless motors.

    Best Fan Heater for You

    Nowadays, more and more places will need fan heater for complete temperature heating, since different types of fan heater have been coming out, knowing product classification is necessary for user to choose suitable fan heater. Basically fan heater is used at many situation, but it is mostly used in workshops or some large buildings. Thus, there are industrial fan heater, car heater and steam heater and so on.

    What is a Gas Detector?

    Gas detector is an instrument for detecting the concentration of gas leakage, including portable gas detector, hand-held gas detector, fixed gas detector, online gas detector, etc. It mainly uses a gas sensor to detect the types of gases present in the environment, and the gas sensor is a sensor used to detect the composition and content of the gas.

    What is SCARA Robot?

    SCARA robots, also known as Selective Compliance Assembly Robot Arm or joint robotic arm, which are one of the most common forms of industrial robots in today's industrial field. SCARA robots are suitable for mechanical automation in many industrial fields, such as automatic assembly, painting, handling, welding and so on.

    What are the Different Types of Viscometer?

    Viscometer is an instrument used to measure the viscosity of a fluid ( liquid or gas ). Viscosity is the physical quantity of internal friction occurring in the fluid when the fluid is flowing. It is the ability of the fluid to resist deformation and an important index used to identify some finished or semi-finished products. Viscosity varies with the type and temperature of the fluid. And what are the different types of viscometer? The following are seven common types which are widely used in petrochemical, pharmaceutical, food, light industry, textiles and other fields.

    Electric Linear Actuator Basics & Working Principle

    Electric linear actuator mainly composed of motor, actuator and control device, which can realize remote control and centralized control. Electric linear actuators perform reciprocating motion within a certain range of strokes. Generally, the standard strokes of linear actuators are 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm. Special strokes can also be designed and customized according to different application conditions. Electric actuators with different thrust can be designed according to different application loads. Generally, the maximum thrust can reach 12000N and the no-load running speed is 4mm ~ 35mm/s. The electric linear actuator uses a 12V / 24V / 36V / 48V DC permanent magnet motor as the power source, and converts the rotary motion of the motor into a linear reciprocating motion.

    Why is the Neutral Wire So Important?

    The impedance of N-wire is at the milliohm level, and its unbalanced voltage of load neutral point is the voltage drop of N-wire current on N-wire impedance with small value. Even if the three-phase load is seriously unbalanced, it is enough to clamp the neutral point potential of load on the neutral point potential of power supply. While the ground resistance is at the ohm level, which is several hundred times larger than the N-wire impedance, so it is impossible to clamp the neutral point potential of load on the neutral point potential of power supply.

    How to Select a Variable Frequency Drive (VFD)?

    With the rapid development of industrial automation, the variable frequency drive, used for frequency conversion debugging, is thereof widely used. As an important role of frequency conversion speed regulation and energy saving, VFD is mainly used to control the AC motor's power control equipment by changing the frequency of the motor's working power supply. It's not only advantageous for improving the enterprise's process and production level, but also plays an important role in energy saving. But how should we choose an appropriate VFD?

    Tips for Using Draw-wire Displacement Sensor

    The ATO 1000-50000mm draw-wire displacement sensor has a small mounting size, compact structure and high precision. Its measuring range can be 1000mm/2500mm/5000mm or even 50000mm. This draw-wire displacement sensor is particularly suitable for linear rolling guide system, hydraulic cylinder system, testing machine, telescopic system (forklift, press, lifter, pipe bender, bending machine, etc), crane or cable winch, reservoir dam protection system, gate opening control system, pressure machine, hydraulic universal experimental machinery, warehouse location position, length and displacement measurement and position control of various industrial instruments.

    What is a Pancake Load Cell?

    Pancake load cell is also known as low profile load cell, because it has a low profile design and it looks like a pancake. On the other hand, pancake load cell can bear both tension and compression force. So it is also a tension and compression load cell that is widely used for platform scale, truck scale, rail weighbridge and tension tester.

    What is Single Phase to 3 Phase Converter?

    Traditional phase conversion system adopts rotary transformation technology, which has 50 years of history and simple product structure in early times. It consists of a transformer, three-phase motor, capacitor and relay control circuit. As long as the 220V power is connected, the auxiliary motor starts, the starting capacitor is disconnected and the motor is turned into a generator, thus producing missing phase. A fairly rough three-phase electric lead can be produced to provide power supply for other electrical equipment. Such a traditional conversion system doesn't have the adaptive control function, so there are many defects in its application. When the load varies widely, the three-phase output voltage will be unbalanced. At free load or light load conditions, the output voltage will rise to more than 25% of the rated output voltage; When the load is too large, it will also greatly reduce the output voltage, making it difficult for the device to start or stop running. However, the single phase to 3 phase power converter of ATO uses many important new technologies, the newly invented built-in micro-control computer control program makes our products to have a qualitative leap in conversion efficiency and performance.

    What is an Oscilloscope Probe?

    The oscilloscope probe is mainly used to guide the measured voltage signal from the measuring point into the oscilloscope for measurement. Probe is crucial to the accuracy and correctness of the measurement results, as it's the electronic component connecting the measured circuit and the input of the oscilloscope. The simplest probe is a wire that connects the measured circuit and the input of the oscilloscope, a complex probe consists of resistor-capacitor unit and active devices. A simple probe has no shielding measures, so it's susceptible to external electromagnetic interference. Meanwhile, larger equivalent capacitance in it would increase the load on the measured circuit, thus leading to distortion of the measured signal.

    What is a pH electrode?

    A pH electrode is a part of the pH meter contacting with measured substance. It's used to measure the electrode potential. Generally, there are two methods to measure the pH value of the aqueous solutions, namely Colorimetry (pH test paper and cuvette) and potentiometric method. The latter is the only way to realize continuous on-line measurement and process monitoring. Moreover, it can obtain accurate and repeatable pH value. The electrode used in the potentiometric method is called as primary battery, which is a system used to converse the chemical reaction energy into electrical energy, voltage of the primary battery is called for electrodynamic force (EMF).

    What is the Chemical Element Analysis Instrument?

    What is the principle of the chemical element analysis instrument?
    Chemical analysis instrument is mainly used for in-site measurement of elements in metal materials in the military industry, aerospace, iron and steel, petrochemical, power, pharmaceutical and other fields, it's an indispensable tool for rapid identification of materials in the industrial and military manufacturing fields accompanying the rise of the world economy.
    Principle of chemical element analysis instrument.

    What is a pH meter?

    A pH meter is an digital instrument used to test and monitor the pH value of a solution. It works by the principle of primary battery, of which the electromotive force between two electrodes is based on the Nernst Law. Electromotive force of primary battery is affected by both property of electrodes and hydrogen ion concentration in the solution. There is a correspondence relationship between the electromotive force and hydrogen ion concentration of the primary battery, namely negative logarithm of the hydrogen ion concentration is equal to the pH value.

    PLC Pulse Control Stepper Motor

    As a common electrical actuator, stepper motor is widely applied in automatic control field. Stepper motor needs to be equipped with a special drive power the output of which is controlled by external pulse signal and direction signal. Each pulse signal can make stepper motor rotate a fixed angle, which is called step angle. Total angle and speed of rotation respectively depend on the number and frequency of pulse. The direction of rotation depends on direction signal. For a equipment with a known transmission ratio, the movement distance and speed of its parts can be controlled by controlling the number and frequency of pulse without the requirements for the feedback of distance and speed signals; and direction signal can control moving direction. Therefore, open loop control is a simple and economic electronic control technical scheme.

    Linear vs. Switching Power Supply

    Power supply is an important part of the circuit design, and the stability of the power supply determines the stability of the circuit to a large extent. Linear power supply and switching power supply are two common power supplies, and they have a great difference in the principles which determine the difference between the two applications.