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The ball valve is evolved from the plug valve. It has the same lifting action of rotating 90°, the difference is that the cock body is a sphere with a circular through hole or channel through its axis. The ratio of the spherical surface to the channel opening should be such that when the ball rotates 90°, all spherical surfaces should appear at the inlet and outlet, thereby truncating the flow. The ball valve can be closed tightly with only a 90° rotation operation and a small torque. The completely equal valve body cavity provides a low resistance, straight-through flow path for the medium.

Thermal overload relays are overload relays that apply the principle of current thermal effect and use electrical thermal bimetallic sheets as sensitive components. The electrical thermal bimetal sheet is made by heating and rolling two alloys with large difference in linear expansion coefficient. When heated, the bimetallic sheet bends from the high expansion layer to the low expansion layer. When the current is too large, the element acts due to "heat", so that its linked moving contact cuts off the power supply of the controlled circuit and the protected equipment.

The Diaphragm pump, also known as control pump, is the main type of actuator. It changes the fluid flow with the help of power operation by receiving the control signal output by the adjustment control unit. The function of the diaphragm pump in the control process is to accept the control signal of the regulator or computer, change the flow rate of the adjusted medium, and maintain the adjusted parameters within the required range, so as to achieve the automation of the production process.

Linear guideways, also known as line rails, are used in high-precision or high-speed linear reciprocating motion applications. They can bear a fixed torque and can achieve high-precision linear motion under load.
Linear rails can be divided into roller linear guides, cylindrical linear guides, and ball linear guides. According to the nature of friction, linear motion guideways can be divided into sliding friction guides, rolling friction guides, elastic friction guides, fluid friction guides, etc.

The appearance of the chip capacitor is made of ceramics. So it is known as multilayer ceramic chip capacitor (MLCC). Multilayer ceramic capacitors are made of parallel ceramic materials and electrode materials. So what are the functions of multilayer ceramic capacitors? The bypass capacitor is an energy storage device that provides energy to the local device. It can make the output of the regulator uniform and reduce the load demand. Like a small rechargeable battery, the bypass capacitor can be charged and discharged to the device.

A carbon dioxide sensor or CO2 sensor is an instrument for the measurement of carbon dioxide gas. The most common principles for CO2 sensors are infrared gas sensors (NDIR) and chemical gas sensors. Measuring carbon dioxide is important in monitoring indoor air quality, the function of the lungs in the form of a capnograph device, and many industrial processes.

Angle seat valves are 2-way, 2-position pneumatic piston valves. The piston pneumatic actuator provides linear motion to lift the seal from its seat. Because the seat is positioned at an angle, flow obstruction is minimal in the open position, resulting in excellent flow and low pressure losses. They are used to regulate the flow of liquids, gases, vapors, vacuum and even corrosive fluids. Angle seat valves can operate in high temperature and high viscosity media even at zero differential pressure. Rugged design makes these angle seat valves a best choice for harsh applications, and they have a very high cycle life.

Machine tool work lights are lamps suitable for various large-scale construction operations, emergency repairs, rescue and disaster relief and other work-site lighting. The LED machine light adopts green environmental protection, high-power white LED solid-state light source, LED machine tool light with high light efficiency; LED anti-glare lampshade makes the light milder, no glare, and machine tool lighting improves work efficiency; good electromagnetic compatibility will not pollute the power supply; the shell is made of light weight Alloy material, wear-resistant, anti-corrosion, waterproof and dustproof.

The hot wire anemometer is a type of anemometer that converts the flow velocity signal into an electrical signal, and can also measure fluid temperature or density. The length of the hot wire is generally in the range of 0.5 to 2 mm, and the diameter is in the range of 1 to 10 microns. If a very thin metal film instead of a metal wire, which is called a hot-film anemometer. The function is similar to that of a hot wire but is mostly used to measure the flow rate of liquids. 

Electrolytic capacitor is a kind of capacitor, the metal foil is the positive electrode (aluminum or tantalum), the oxide film (aluminum oxide or tantalum pentoxide) that is close to the positive electrode is the dielectric, and the cathode is made of conductive material, electrolyte (the electrolyte can be liquid or Solid) and other materials together, because the electrolyte is the main part of the cathode, so the electrolytic capacitor is named. At the same time, the positive and negative electrolytic capacitors should not be wrongly connected.

Explosion-proof motor is a kind of motor that can be used in flammable and explosive factories, and does not generate electric sparks during operation. In a very short period of time, a large amount of energy is released, high temperature is generated, and a large amount of gas is released, causing a high-pressure chemical reaction in the surrounding medium.

An automatic transfer switch (ATS) is a device that automatically transfers a power supply from its primary source to a backup source when it senses a failure or outage in the primary source. The auto transfer switch has advantages of simple structure, easy & reliable operation, no noise, small impact, and long service life. Auto changeover switch is suitable for the illuminating circuits of commercial buildings, shopping mall, banks, and high-rise buildings where the power supply can not be cut off for a long time.

A centrifugal pump is a mechanical device designed to move a fluid by means of the transfer of rotational energy from one or more driven rotors, called impellers. Fluid enters the rapidly rotating impeller along its axis and is cast out by centrifugal force along its circumference through the impeller's vane tips.

An induction motor refers to an AC motor that relies on electromagnetic induction between the stator and the rotor to induce a current in the rotor to realize electromechanical energy conversion. The stator of the induction motor consists of three parts: the stator core, the stator winding and the frame. Under normal circumstances, the rotor speed of the induction motor is always slightly lower or slightly higher than the speed of the rotating magnetic field, so it is also called an "asynchronous motor".

Hydraulic hand pumps play an important role in every industry that requires testing and calibration of pressure instruments such as pressure transmitters, gauges and switches. From energy production and healthcare to construction and wastewater management, they perform a very necessary function that ultimately helps keep our global economy running safely and efficiently. With such a wide range of uses, there isn't one hydraulic hand pump can meet the needs of all applications. So, in this article we'll learn about the basic functions of a hydraulic hand pump and outline some of its most important features.

Laser sensors utilize laser technology to measure. It consists of a laser, a laser detector and a measuring circuit. Laser sensor is a new type of measuring instrument. Its advantages are fast speed, high precision, large range, strong anti-light and electrical interference ability, etc. And it can realize non-contact long-distance measurement.

The electrical measuring instrument in the pressure measuring instrument is usually called a pressure transducer (pressuretransducer). It is a sensor that converts the pressure signal into a voltage signal output. Usually the pressure sensor is generally composed of elastic sensing element and displacement sensing element. The function of the elastic sensing element is to make the measured pressure act on a certain area and convert it into displacement or strain, and then the displacement sensing element or strain gauge converts it into an electrical signal that has a certain relationship with the pressure. Sometimes the functions of these two elements are combined. 

Static eliminators are products that protect susceptible items from the effects of static discharge. These static shields are also known as antistatic (anti-static) devices, anti-static electricity devices, or static charge eliminators. Static eliminators work by dampening, reducing, or otherwise inhibiting its buildup or discharge.

Today we will introduce what is a voltage sensor and its working principle and function. We hope that after reading this article, you will have a clearer understanding of voltage sensors.

A voltage sensor is a sensor that senses the voltage being measured and converts it into a usable output signal. In various automatic detection and control systems, voltage sensors, often need to track and collect high-speed changing AC and DC voltage signals.

Butterfly valve, also known as flap valve, is a kind of regulating valve with simple structure. Butterfly valve can be used for switch control of low-pressure pipeline medium. It means that the closing member (disc or butterfly plate) is a disc, which rotates around the valve shaft to achieve opening and closing of a valve. Today, we are going to introduce what is a butterfly valve to you. We hope that you can have a general idea about it after reading.