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The antenna is the eye of the radar level meter, and the shape of the antenna must be suitable for the physical properties of the electromagnetic wave. The shape of the antenna determines the focus and sensitivity of the radar wave, just like the sensitivity of a microphone. Therefore, the applicable environment of radar level meters with different antennas is different. This requires us, when selecting the model, we should choose the radar level meter with corresponding antenna according to the characteristics of the working conditions. In the following, the specific radar level meter from the antenna to see how to select the problem.1、The horn mouth antenna has good focusing characteristics and can be applied to most of the occasions. The working pressure can reach 64bar (1bar=100kPa). If the corresponding cooling measures are used, the temperature of the measured medium can reach 1000℃. In the field many storage tanks and reaction tanks choose this type of antenna, but not for corrosive media measurement.　　2, rod antenna installation flange size is small, chemical stability is very good, easy to clean, insensitive to the adhesion of condensate, especially suitable for measuring corrosive media, working pressure up to 16 bar, the temperature of the measured medium up to 200 ℃. Its emission angle is large, the signal-to-noise ratio is small, commonly used to measure the better conditions of the tank and for the measurement of corrosive media.3、Flange down type antenna is suitable for high temperature medium, corrosive medium or measurement environment that can't be installed on top.　　4、Installation of casing antenna: casing has focusing effect on radar wave. When the medium dielectric constant is low (1.6~3) or the liquid surface produces continuous eddy current or the device in the vessel causes false reflection, this type of table can be selected. The antenna is installed in a wave guide tube or in a bypass tube, and the casing will have an effect on the running time (depending on the casing inner diameter), so the inner diameter of the casing should be entered into the electronic component to compensate for the change in running time. In addition it is required that the measured medium has a relatively good flow and is not easy to form a hang-up.5, the material of the shell: aluminum shell meter is not resistant to the corrosion of alkali, in this occasion try to use plastic.　　6, tank, tank is relatively high, it is appropriate to use parabolic antenna, because its aggregation is good.　　The above is "from the antenna shape to analyze how to select the radar level meter" related to the introduction, such as to learn more level switch (level switch, level switch), level meter (level meter, level meter) and other level measurement instrument knowledge, welcome to pay attention to and consult us!

High quality instrumentation will undoubtedly significantly improve the reliability and stability of measurement and control, but in the process of daily use, if you can consciously strengthen the safety management of the instrument, it will make the instrument better used for vibrating fork level measurement and control, while also extending the service life of the instrument. So, how to do a good job in the safety management of instruments and meters? Generally speaking, it is necessary to start from the following points:I. Instrument maintenance and commissioning    Before the instrument maintenance and commissioning work, should understand the process and equipment operating status, and notify the operating operator. In the instrument or component disassembly, should be cut off the measured media path and instrument power source. In addition, the site operation should also arrange personnel to do a good job of supervision to prevent the breakage of pipe threads or welds.　　Second, the management of monitoring, interlocking and alarm system instruments　　In order to ensure the safety of the instrument, attention should be paid to the management of the monitoring, interlocking and alarm system instruments, specifically to do the following work:　　1, for monitoring, interlocking alarm system instruments and switches should not be removed or shorted at will.　　2, the alarm instrumentation test, reset, muffling, memory and tone difference functions should be intact.　　3, instrumentation system belongs to the solenoid valve, safety valve, regulating valve and speed control device and other instrumentation actuators should be regularly calibrated and positioned.Third, lightning protection, anti-static device inspection and repair　　Control systems, electrical systems, instrument panels (tables, boxes, cabinets) should be equipped with lightning protection, anti-static devices, and keep intact. In addition, lightning protection, anti-static device testing and repair should be qualified units, and meet the specification requirements.　　Fourth, the instrumentation wire, power supply, cable inspection　　In daily work, attention should be paid to the instrument conductors, power supplies and cables and other checks. In particular, attention should be paid to the following aspects:　　1, the instrument panel (table, box, cabinet) and junction boxes and other protective grounding.　　2, instrumentation and auxiliary equipment used fuses should meet the technical requirements.　　3, signal conductor and wire should be terminal number, the cable should be listed.　　4, power supply device nameplate should be complete and distinct.Five, flammable and explosive places instrument maintenance　　If the instrument is installed in a flammable and explosive place, when repairing the instrument, make sure to open the cover for maintenance or adjustment without electricity. At the same time, when maintaining the instrument, attention should also be paid to the use of explosion-proof tools to avoid dangerous occurrences.　　In the daily safety management of the float type level measurement instrument, under the premise of operating in accordance with the safety operation procedures, the above requirements are checked item by item so that all aspects of the instrument application meet the safety requirements.　　The above is the introduction of "instrument, instrument safety management methods", if you want to know more level switch (level switch, liquid level switch), level meter (level meter, liquid level meter) and other level measurement instrument knowledge, welcome to pay attention to and consult us!

Different working conditions and different measuring media have led to the development of a wide variety of level measuring instruments. There are different classifications of level measuring instruments according to different instruments. In this paper, we mainly talk about the categories of level measurement instruments from two aspects, namely, measurement mode and measurement method.First, according to the measurement mode　　Level measurement instrument can be divided into two categories according to the measurement mode: limit measurement instrument (level switch) and continuous measurement instrument (level meter, level transmitter).　　1、Limit measuring instrument　　Limit measurement instrument is usually called limit switch, which mainly detects whether the level reaches a specific position such as upper limit, middle value or lower limit. The output signal is usually in the form of a two-position on/off (ON/OFF) signal, high and low level. When the level does not reach the set point, the normal signal is output, and when the set point is reached, the alarm signal is output.　　2、Continuous measuring instrument　　Continuous measuring instrument is mainly used to measure the level change in the whole range, and output with analog (4-20mA) or digital signal, indicating the corresponding level value. Some level meters also have digital or analog level display, usually with a number of switch points (ON/OFF) signal output that can be set at any time within the range.　　Second, according to the measurement method　　According to the measurement method to classify, the molten metal level measurement instrument mainly includes the following: 1.　　1、Direct level measuring instrument　　2、Static pressure level measuring instrument　　3、Buoyancy level measuring instrument　　4、Electrical level measuring instrument　　5、Ultrasonic level measuring instrument　　6、Radar type level measuring instrument　　7、Radioactive level measuring instrument　　8、Vibrating fork level measurement instrument, etc.Ltd. is a company specializing in the research, development, production and sales of level measurement instruments. Currently, Guangdong Kaidi Energy Technology Co., Ltd. independently develops and produces highly reliable level measurement products, such as　　Vibrating level switch--there are mainly 3 series of tuning fork level switch, tuning fork level switch and vibrating bar level switch, which are applicable to the measurement of various liquids, powders and granular solids, and all products have passed the double explosion-proof certification of explosion-proof/intrinsically safe. 　　Magnetic level meter - there are 4 series of economic type, standard type, lined type and plastic type, and magnetic switch and remote transmitter with double explosion-proof/internal safety certification, which are ideal for continuous level measurement and monitoring.　　RF Admittance Level Switches - including four models of general-purpose, protective, cable, and ultra-high temperature, especially suitable for the measurement of fly ash, solid particles, and adherent materials.　　Rotary level switch - including standard type rotary level switch, protective type rotary level switch, suitable for most of the solid particles powder and density of solid particles measurement.　　Float level meter - including standard float level meter, acid and alkali resistant float level meter, suitable for most of the liquid measurement.　　Radar level meter--High reliability products assembled by imported modules, there are 6GHz low frequency pulse radar level meter, 80GHz high frequency pulse radar level meter and 120GHz in continuous wave high frequency radar level meter.　　Ultrasonic level sensor--There are 2 series of standard ultrasonic level meter and explosion-proof ultrasonic level meter, which adopt contactless measuring method, easy to install, easy to maintain, efficient and accurate measuring results, suitable for continuous level measurement of various tanks and pools in industrial environments such as sewage treatment, chemical industry, thermal power plants, marine transportation, etc. It is an economic liquid level measuring instrument.The above is the introduction of "level measurement instrument categories", if you want to know more level switch (level switch, liquid level switch), level meter (level meter, liquid level meter) and other level measurement instrument knowledge, welcome to pay attention to and consult us!

  How about determining whether instrumentation in industry meets the requirements for explosion protection? This is a worthwhile learning point for users who need to use explosion-proof products or for partners who need to know about level instruments. The following Kaidi Energy Technology Co., Ltd. to introduce you to the relevant aspects of knowledge points!At present, in many complex working conditions of the application site, the instrument must be a product with explosion-proof function. In general, explosion-proof products can meet most of the explosion-proof requirements. However, due to the variety and quality of products on the market industrial instrumentation varies, explosion-proof products mixed, it is difficult to distinguish the real from the fake. Therefore, in the actual selection, how to quickly identify whether the instrument meets the requirements of explosion-proof is very important. Here, according to the author's experience in product design, three methods to determine whether industrial instruments meet the requirements of explosion-proof.A, the appearance of identification methodAppearance identification method, that is, through the appearance of the instrument, the initial determination of whether to meet the requirements of the explosion-proof. There are several specific places to identify the following.(1) nameplate identification: whether the instrument's nameplate has Ex explosion-proof symbol, whether the parameter description of the explosion-proof level description.(2) Glan head (cable entrance): Flameproof glan head should be made of metal (such as stainless steel, brass, etc.).Second, the explosion-proof certificate identification methodExplosion-proof instruments have the corresponding explosion-proof certification. To determine whether the instrument meets the explosion-proof, you can inquire at the third-party website of explosion-proof certification. If the product model matches the actual product, it means that it meets the explosion-proof requirements, and vice versa.Third, the technical verification methodTechnical verification method, that is, through the basic definition of explosion-proof, from the shell size and structure of the initial identification of the instrument to meet the requirements of explosion-proof.According to the standards and requirements of industrial instrumentation explosion-proof, explosion-proof instrumentation is defined as follows.(1) electrical equipment enclosures that can withstand the dangerous pressure of the internal hazardous gas mixture and prevent the propagation of the internal hazard to the hazardous mixture around the enclosure (Zone I explosion-proof technology).(2) allows hazardous gases to enter the explosion-proof enclosure, which may create a hazard within the enclosure. However, the enclosure must be of sufficient strength; and each enclosure joint must have a long enough engagement length and a small enough gap to ensure that the internal hazard does not pass through the explosion-proof joint and result in an external environmental hazard.(3) is the gap explosion-proof technology, relying on the gap, the length of engagement to achieve the effect of cooling, flameout.From the definition, it can be seen that the requirements of the explosion-proof is mainly for the instrument housing, our initial judgment can be achieved by the number of screw teeth on the housing cover, in accordance with the requirements of the explosion-proof, screw teeth to meet the 5 teeth and the total engagement length of 8 mm can be.The above three methods of determination are very effective in verifying that industrial instrumentation products meet the requirements of explosion isolation.For rotary level switches, especially for tuning fork level switches, the identification of their explosion-proof function is particularly important. There are too many inexpensive and low quality products on the market, which make it difficult to identify whether they are explosion-proof or not, causing customers to be at a loss when choosing products. Especially in the higher requirements for explosion-proof occasions, if the pursuit of low prices, while ignoring the performance indicators of the product may lead to serious consequences, so it is particularly important to learn to identify whether industrial instruments meet the requirements of explosion-proof.The above is about how to determine whether the instrumentation in industry to meet the requirements of the explosion-proof? This point of knowledge to explain, if there is anything you do not understand the place or other insights can be left in the comments section to discuss Oh!