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Solar radiation is radiant energy emitted by the sun from a nuclear fusion reaction that creates electromagnetic energy. The spectrum of solar radiation is close to that of a black body with a temperature of about 5800 K. About half of the radiation is in the visible short-wave part of the electromagnetic spectrum. The other half is mostly in the near-infrared part, with some in the ultraviolet part of the spectrum.

Solar radiation sensor is designed on basis of silicon-cell principle. It is mainly used for measuring solar radiation within 300-1100nm wavelength. If the sensing face is downwards, it can test the reflected radiation and solar radiation on the incident to the inclined plane. PAR sensor is mainly used for measuring solar radiation within 400-700nm wavelength. It is easy installation and can work continuously in all weathers. When there is sunlight, voltage output proportional to incident light intensity will be generated by the silicon-photo detector in the sensor. 

A garage door opener is a motorized device that opens and closes a garage door controlled by switches on the garage wall. It is common equipment in homes and factories. This article will introduce specific measures when garage door opener fails.

In the steel production process, monitoring the temperature is essential to improve productivity and product quality. Whether the temperature of the production process is within the range required by the process; whether the temperature of the heating furnace is too low or too high; whether the rolling mill needs to be adjusted, or to what extent it needs to be cooled, infrared thermometers can solve these problems well. Infrared thermometers are mainly used in continuous casting, hot blast furnace, hot rolling, cold rolling, bar and wire rolling in the steel processing and manufacturing process.

As we all know, a gas detector is an instrument used to detect changes in the concentration of harmful gases at work sites. In some limited spaces with large areas and complex environments, the working environment can be said to be changing rapidly. Gas detectors can remind staff to take preventive measures in a timely manner, and can also let companions know each other's location and distance. Today we will introduce the installation, maintenance and precautions of the gas detector.

Radiation sensor works by measuring the number of small units of light, known as photons that impact a physical or chemical device located within the instrument. Solar radiation sensors are typically not powered due to the fact that the components located in the device either are influenced by or react to solar radiation in a direct manner.

Proximity sensor is a general term for sensors that replace the contact detection methods such as limit switches and aim to detect without touching the detection object. The movement information and presence information of objects can be detected and converted into electrical signals.

As proximity sensor is so important, today we are going to introduce two types of proximity sensor. We hope that you can know the specialties of two types of proximity sensor.

The hardness tester is a special instrument used to measure the surface hardness of coatings. There are two types of hardness testers: desktop hardness tester and portable hardness tester. Desktop hardness tester is mainly used in laboratory and has the advantage of high precision. Portable hardness tester is used for installed mechanical or permanent assembly parts and is easy to carry. The portable hardness tester integrates portable hardness testers such as Brinell, Rockwell, etc., and can realize the free conversion of 7 different hardness values.

Today, we are going to introduce gear pump to you. Gear pump is applied in industrial widely, if you have a general idea about gear pump, it will help you a lot in you work.

The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two closed spaces are composed of two gears, pump body and front and rear covers. When the gear rotates, the volume of the space on the disengagement side of the gear increases from small to large, forming a vacuum. After the liquid is sucked in, the volume of the space on the meshing side of the gear changes from large to small, and the liquid is squeezed into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears. The pressure at the outlet of the gear pump depends entirely on the resistance at the pump outlet.

A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. Transformers are used to change AC voltage levels, such transformers being termed step-up (or step-down) type to increase (or decrease) voltage level. Step-up transformer is widely used in high-frequency fields, such as inverter power supplies. In this article, we will briefly introduce some maintenance precautions of step-up transformer.

Radiation sensor adopts photoelectric principle and can be used to measure the total radiation value under sunlight. The radiation sensor uses high-precision photosensitive elements, wide spectrum absorption, high absorption in the full spectrum range, and good stability. A dust cover with a light transmittance of up to 95% is installed outside the sensing element, and the dust cover is specially treated to reduce dust adsorption can effectively prevent environmental factors from interfering with internal components, and can more accurately measure solar radiation.

Temperature sensor is a sensor that senses temperature and converts it into a usable output signal. It is the core part of the temperature measuring instrument. According to the measurement method, there are two types of temperature sensor: contact sensor and non-contact sensor. And according to the characteristics of sensor materials and electronic components, it falls into two categories: thermal resistance and thermocouple. ATO offers you different kinds of thermocouples and RTD sensors. When you need to buy a temperature sensor, we'll cover every detail to help you make the most economical and practical decision.

The diaphragm pump separates the liquid to be pumped, the movable column and the pump cylinder by means of a membrane, thereby it protects the movable column and the pump cylinder.

The full name of RTD is Resistance Temperature Detector. RTD is a special kind of resistor whose resistance value increases as the temperature increases and decreases as the temperature decreases. RTD is used as sensor in industry to measure temperature, so RTD is also called "thermal resistance". RTDs are more linear than thermocouples and are the most accurate and stable temperature sensors available. But because the change of resistance takes time, its response speed is slow. At the same time, its price is relatively expensive, and it is suitable for occasions where there are certain requirements for accuracy and the cost control is not strict.

The isolator uses a kind of linear optocoupler isolation principle, which converts the input signal and outputs it. Input, output and working power are isolated from each other, especially suitable for use with equipment and meters that require electrical isolation. Isolator, also known as signal isolators, is an important part of industrial control systems. 

Diaphragm pump is divided into air powered diaphragm pump and electric operated diaphragm pump. Pneumatic diaphragm pump is a new type of conveying product that uses compressed air as the power source. It can absorb all kinds of corrosive liquids, liquids with particles, high viscosity, volatile, flammable and highly toxic liquids. Material is available in aluminum alloy, stainless steel, non-metallic and cast iron. Electric diaphragm pump is also a new type of pump, which is used in petrochemical, ceramics, metallurgy and other industries.

Optical fiber communication technology has developed rapidly in the last 20 years. Since optical fiber communication transmits a large amount of information at a fast speed, and it can transmits digital signals, which makes it possible to transmit information such as broadband image signals and computer networking. Thus, optical fiber measurement has entered into a new period of digitization.

Ultrasonic distance sensors are designed to measure the distance to a remote object through the air without physically touching it. Distance sensors determine this value by emitting high-frequency or ultrasonic soundwaves toward the object being measured, receiving the reflected wave, and calculating the time between emission and reception. While this broad selection makes it possible for customers to find a ultrasonic distance sensor that suits their unique application, it can also make it more difficult to determine which one is right. When we choose ultrasonic distance sensors, we should consider several problems. Here is a brief introduction about what they are.

At present, with the continuous improvement of people's living, various industries pay more and more attention to the temperature and humidity management environment of product production, equipment and warehouse storage. Therefore, it is necessary to use the temperature data loggers. The temperature and humidity data logger measures the temperature and humidity parameters and stores them in the recorder according to predetermined time intervals or uploads them to the computer cloud platform through Bluetooth or USB. The data logger can be exported and analyzed to ensure that whether there are any incidents that endanger the safety of the product during the storage and shipping. However, which industries need temperature and humidity monitoring systems?

The realization of the overload protection function of the miniature circuit breaker is based on the principle that bimetals bend in a regular direction as the temperature rises. After the miniature circuit breaker is closed, it is in normal working condition. The inner bimetal is heated by a certain current passing through it. The two pieces of metal have different thermal expansion coefficients and cause bending.