SILVER AUTOMATION INSTRUMENTS

The turbine meters for gas possesses many advantages like high accuracy、good repeatability、simple structure、less moving parts and resistance to high pressure. Moreover, its measurement range is wide and its size is small、its weight is light and it has small pressure loss. What’s more, it is handy to be repaired. It is used in sealing pipes to measure the volumetric flow and total amount of low viscosity gas. In addition, it has a wide use value in many fields including petroleum、chemical industry、metallurgy and pipe network of gas in the city. The main characteristics of  turbine meters for gas 1. It has wide measurement range and its flow rate of the lower limit is less than 0.5m/s. It has small pressure loss and its impellers have a strong resisting capacity of impacting. 2. It has an excellent capacity of resisting electromagnetic interference and vibration, which adopts full sealing insulation blocking and maintenance—free bearing. What indicates is that it has a reliable property

The objects shake, which lets people listen, whose frequency is between 20HZ and 20KHZ. Ultrasonic wave is more than 20KHZ, infrasonic wave is less than 20HZ. The normal ultrasonic wave frequency is between tens of KHZ and tens of MHZ. Ultrasonic is a mechanical oscillation in an elastic medium. There are two ways: Lateral oscillation  (share wave) and longitudinal oscillation(Longitudinal wave ). Ultrasonic can transfer in gaseous,  liquid and solid, and their speed is different. In addition, it also has refractive and reflection phenomena, and there is attenuation in the propagation process.When the ultrasound is transmitted through the air, its frequency is low, normally tens of KHZ, while when it is transmitted through the solid and the liquid, its frequency is high. It decays fast in the air, while in the liquid and the solid, it decays slowly and transfers far. Using the feature of ultrasonic, people produce many kinds of ultrasonic sensor and make various ultrasonic measuring in

In real life, it is easy for us to find the application of  ultrasonic sensor for level measurement . With the rapid development of the technology, the range of ultrasonic sensors is also becoming more and more extensive. In the history of human development, the application of ultrasonic sensors is everywhere, so long as the human can imagine the place, it can dabble in one foot. The discovery of hybrid rice, the discovery of atomic nuclei and hydrogen bombs, greatly reduced the distance between China and other advanced countries, which add energy to the economy of our country.  ultrasonic sensor for level measurement  is so widely used, do you really know the principle and scope of application?  Ultrasonic sensor for level measurement  is made by the properties of ultrasonic waves. Ultrasonic wave is a mechanical wave that vibrates more frequently than sound waves. Ultrasound is a kind of mechanical wave. Ultrasonic level sensor’s vibrational frequency is higher than the sound wave, w

1.The working principle of the temperature sensor high temperatures-abstract The temperature sensor is that the temperature is converted into a usable output letter by using the physical properties of the material with the change of temperature Number.  Temperature  sensor  is the core part of temperature measurement instrument, which has various types. According to the characteristics of sensor materials and electronic components, thermal resistance and thermocouple are divided into two categories: contact type and non-contact type. The modern temperature sensor is very small in shape so that it can be widely used in various fields of production practice, which also provides countless convenience and functions for our life. 2.The working principle of the temperature sensor high temperatures-classification There are four main types of temperature sensor: thermocouple, thermistor, resistance temperature detector (RTD) and IC temperature sensor. The IC temperature sensor has two typ

The model selection is very important for the  flow meter . The relevant information indicates that the 2/3 of faults happening during the actual application of instrument is caused by the wrong model selection and improper usage. Thus, after making sure the selection of mag meter, many factors should be involved in consideration comprehensively according to different technologies、environments、measurements and media. 1.The selection of mag meter size On the basis of the diameter in the process pipe line、pipeline pressure and flow velocity of sewage drainage provided by sewage disposal plants, it had better choose the mag meter with D=600mm, There is no need for shrunken pipe and pipe expanding on the spot. 2.The selection of lining and electrode material The mag meter is mainly used to test the fluid flow that is with a conductivity of ≥5μS/cm. We should choose different lining and electrode material according to the characteristics such as corrosion、 abrasiveness、temperatur

The basic principle of mag meter is faraday law of electromagnetic induction. It means when a conductor cuts magnetic movement in a magnetic field, both sides of the conductor will produce induction electromotive force named E : E=KBvD （1） In this equation, K is instrument constant; B is intensity of magnetization（T）; V is the average speed of conductor’s movement m/s; D is the bore size of piping（m）;  The principle of mag meter The  mag meter  is composed of two parts called flow sensor and converter. When testing the flow, conductive liquid plays a role as a conductive metal bar of faraday experiment. It passes through a magnetic field which is perpendicular to the direction of flow at average speed v. The flowing of conductive liquid induces the voltage which is in proportion to average flow speed in the measuring electrode. The induced voltage signal E is detected by a pair or more than a pair of the electrode which has a direct contacting with the liquid.  According to the volu

Flow means the amount of fluid flowing through a given section within a unit time. If it is represented with the volume of size, that can be volume flow. The average flow is an average value of flow in the measuring time. Calibrating apparatus of large—bore flow meter include some auxiliary facilities such as fluid source、pressure accumulator、pipe system、timer、volumetric standard and commutator. The operational principle: to install the tested flow meter on the apparatus, and then start fluid cycle system to make the fluid go through the tested flow meter and standard flow meter. To operating the tested  flow meter  and standard flow meter at the same time and to compare the flow value of output from these two flow meter, further assuring the accuracy of measuring and repeatability. Based on using different standard measuring tools, calibration method can be divided as volumetric method、mass method and master meter calibration method. Volumetric method is to apply standard container to

Flow metering is one of the most important parts in metering scientific technology, which has a close connection with national economy、national defense construction and scientific research. Flow metering is widely applied in varies of fields including industrial and agricultural production、national defense construction 、scientific research and foreign trade as well as people’s live, etc.  There is  steam flow meter 、revolving flow meter、 electromagnetic flow meter  and so on. More and more kinds of flow meters appearing in the market, resulting in the higher and higher requirements in model selection. In flow meter’s industry, here are some common used terms. I will mainly do some introduction about these terms as an editor of Side flow meter in Shanxi. 1.Flow range Flow range of flow meter means that the measuring error can not surpass maximum and minimum range of allowable value in regular service conditions. The difference between maximum and minimum values is called the flow ran

1. Energy metering Energy is divided into primary energy (coal, crude oil, coalbed methane, LPG and natural gas), secondary energy (electric power, coke, artificial gas, refined oil, liquefied petroleum gas, steam) and carrying energy (compressed air, oxygen, nitrogen, hydrogen, water). Energy metering is an important means to manage energy scientifically, achieve energy saving and improve economic efficiency. The flow meter is an important part of energy metering instruments. Very large quantities of flow meters are used in common energy such as water, artificial gas, natural gas, steam, and oil. They are an indispensable tool for energy management and economic accounting. 2. The process of industrial production Flow Meter is one of the large-class instruments in the process automation instrument and device, which is widely used in various areas of the national economy like metallurgy, electric power, coal, chemical industry, petroleum, transportation, construction, textile, food