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In industrial measurement technology, radar level meters are favored for their high accuracy and reliability. However, even such advanced equipment has its limitations - that is, the so-called “blind spot”. Today, we will be in-depth interpretation of this phenomenon, to unravel the mystery of the blind spot of the radar level meter.Radar level meters use microwave signals to measure the height of material in a vessel. When the microwave signal is emitted from the sensor and encounters the surface of the material, part of the signal is reflected back to the sensor and the horizontal height of the material is then calculated based on the time delay. This process is similar to the principle of echolocation, but uses electromagnetic waves rather than sound waves. However, under certain conditions these microwaves may not return to the sensor correctly, resulting in an inability to measure accurately or a complete loss of signal, creating what is known as a 'blind spot'. So what causes this to happen?First and foremost is the physical properties of the material surface. If the surface of the material is very rough or irregular, the microwaves are scattered in multiple directions and only a small portion is reflected back to the sensor. This is like in a dense forest where sound is absorbed and scattered by trees and branches, making it difficult to create a clear echo. In this case, the level meter may not receive enough signal to make an accurate measurement. Another factor is the mounting position and angle. If the level meter is not mounted in the proper position, or the angle is not adjusted optimally, the microwaves may hit the side walls of the vessel instead of reflecting directly back. This is similar to yelling into a valley, where the sound travels along the mountain wall and ultimately does not travel in the direction you want it to. In addition, microwaves travel at different speeds in different media. When there are vapors or other gases in the container, the propagation speed of the microwaves changes, which affects the measurement results. This is similar to how light travels at different speeds in water of different densities, causing the light to refract.Now, let's flesh this out with some more data and examples. Suppose a standard radar level meter has an effective measuring range of 20 meters in air, but in a high-density vapor environment, this range may be reduced to 15 meters or even less. If the actual height of the material in the vessel approaches this changed limit, the level meter may fail to detect the signal, creating a blind spot. One way to solve this problem is to use higher frequency microwaves, which are less sensitive to environmental changes. Another way is to optimize the mounting position and angle of the level meter to ensure that the microwaves are effectively reflected back to the sensor. Also, software algorithms can be used to compensate the measurement data for different environmental conditions.Blind zones in radar level meters are a complex phenomenon involving material characteristics, installation conditions, and environmental factors. Although there are challenges, through scientific analysis and appropriate adjustments, we can minimize the impact of the blind zone to ensure the accurate measurement of the level meter. As the old saying goes: “Know your enemy and know yourself, and you will never be in danger”, a deeper understanding of the working principle and potential problems of radar level meters will make us more comfortable in practical applications.

The level indicator transmitter offers continuous level measurements across a wide range of systems rather than a single point and generates an output signal that directly links to the level within the vessel.   Like other measuring instruments, this tool is also equally important in improving the efficiency of industrial processes by giving accurate and reliable measurements. Have you heard about Kaidi Sensors? It is one of the leading level indicator manufacturers and offers a huge variety of tools and instruments to improve the efficiency of numerous industrial processes. Kaidi Sensors also manufactures a good range of level indicator transmitters and allows you to ensure accurate measurement. To further know about Kaidi’s level transmitter, keep reading. Things to Consider Before Buying Level Indicator TransmitterHow do you select a pressure transmitter? There is a wide range of transmitters, however, before finalizing a level indicator transmitter you must consider some factors and select the transmitter that is best for your specifications and requirements. Let’s discuss these factors in detailProcess MediaThe first thing to consider before buying a level gauge transmitter is the nature of the process media. You must determine clearly whether you need a level transmitter for solid or liquid. Moreover, also decide on what type of solid or liquid you will deal in. For instance, viscous liquids or dirty liquids with mud will block the pressure port of pressure transmitters. Therefore, in the case of viscous liquids, a pressure transmitter is not a good choice. Pressure RangeYou must know the maximum pressure value within the system. Generally, as a rule of thumb, it is always recommended to choose a pressure transmitter having a pressure range of 1.5 times higher than the maximum pressure value within the system. Temperature RangeBesides pressure, it is also important to understand the maximum temperature range of the system. In the case of temperature, the transmitter possesses two temperature ranges i.e., normal operating temperature and compensation range. The normal temperature range is the temperature at which the transmitter performs its function very well without any chances of damage. On the other hand, if the temperature exceeds this range, then it is known as the compensation range. However, the transmitter may not meet performance specifications during application when temperature increases beyond the compensation range. AccuracyIt is also essential to assess the accuracy of the transmitter before deciding on a level indicator transmitter. The accuracy of the transmitter is determined by its hysteresis, nonlinearity, temperature, non-repeatability, zero offset scale, and the influence of temperature. However, you must understand that the higher the accuracy, the higher will be the price of the level gauge with transmitter. Output SignalsThe digital output is expressed as mV, mA, and V. Selecting one output is determined through multiple factors. These factors may include the distance between the system controller and transmitter, interference in the form of noise or electromagnetic signals, and amplifier location. In case you find a need to amplify the signals, then it is always recommended to employ the built-in amplification of the transmitter.In case, your industrial process operates in an environment having high RFI or EMI indicators, then you should also consider specialized protection filters in addition to frequency or mA output.VoltageWhat kind of voltage is suitable for your level indicator transmitter is determined by the type of output signals. In most cases, the transmitters possess built-in voltage regulation, therefore, there are multiple options for supplying voltage. On the other hand, in other cases, transmitters require stable voltage as they have to be configured quantitatively. Therefore, you should always consider both working voltage and system cost when deciding on purchasing a level gauge with transmitter. StabilityDetermining the stability of your transmitter is also a very important aspect to note as it will help you to understand the threshold limit of your transmitter and avoid any kind of performance failure or inconsistency. ProtectionThis factor is mostly overlooked in the majority of cases. However, ignoring this factor can lead to serious consequences in the future.So, before buying a transmitter, you must know suitable working conditions for your transmitter to protect your device, employees, and environment. Kind of ConnectionYou must always be clear on whether to use a short-distance or long-distance connection between your transmitter and electronic equipment as it is also important to ensure the optimal performance of your transmitter. Why Prefer Kaidi Over Others? Kaidi has been offering reliable products to enhance the operational efficiency of various industrial processes since 2012. Having a dedicated team of professionals and designers, the company not only offers a wide range of products but also promises to provide customers with customized solutions. Once you share your specifications and requirements with the company. A special technical session is arranged for you with the experts and depending on your requirements you will get three quotes. You can go with the quote that best matches your specifications. Let’s explore what type of level indicator transmitters are offered by Kaidi Sensors. Why Consider Kaidi for Level Indicator Transmitter - Product highlightsKaidi Sensors has been delivering a high-quality and high-performing level gauge transmitter for more than 20 years. Buying level transmitters from Kaidi Sensors will enable optimal resource optimization and enhance the efficiency of your industrial processes. Does your industrial process occur under high temperature or high pressure? You do not have to worry about whether Kaidi’s transmitter will work under high temperature or pressure as two types of level indicator transmitters are available at Kaidi. Let’s discuss this in detail.Vacuum Pressure TransmitterA vacuum pressure transmitter refers to a mechanical device that estimates the expansive force of a gas or liquid sample. It is also called a pressure transducer. This transmitter is composed of a surface area sensitive to pressure and is composed of silicone, steel, or other materials as per the analyte’s composition. It can be employed in various industrial processes and applications to measure the pressure of fluids, liquids, and gases under varying working equipment. Temperature TransmitterIt refers to an electrical tool that possesses a temperature sensor to separate, intensify, screen noise, and convert signals from sensors to transmit it to the control device. It is specially designed to measure temperature changes and is responsible for altering the small electrical signal from temperature sensors into understandable and readable signals for processing. ConclusionsTo conclude, a level indicator transmitter allows continuous level measurement of both liquid and solid media at any time. Kaidi Sensors offers two types of level transmitters i.e., temperature and pressure transmitters. These transmitters are designed to give precise measurements even during high temperatures and pressure and play a significant role in ensuring optimal resource usage and avoiding spills or accidents. 

It works according to the principle of buoyancy and magnetic coupling. When the magnetic liquid level gauge in the measured vessel rises and falls, the float in the main tube of the magnetic flap level gauge rises and falls with it, and the permanent magnet inside the float is transferred to the field indicator through magnetic coupling to drive the red and white flip columns to turn over 180 °, and when the level rises, the flip columns turn from white to red, and when the level falls, the flip columns turn from red to white, and the indicator's red and white boundaries are the actual height of the liquid level of the medium in the vessel, thus realizing the liquid level indication. Liquid level indication.Local display and remote control are possible. When used for remote control, the magnets and sensors (reed switches) in the float act to change the number of components (such as fixed-value resistors) connected in series into the circuit, which in turn changes the electrical quantity of the meter circuit system. In other words, the change in the position of the magnetic float causes a change in the electrical quantity.The change in electrical quantity is detected to reflect the liquid level in the vessel. It can directly output resistance value signals, or cooperate with the use of the transmission module, output current value (4 ~ 20mA) signals; at the same time with other converters, output voltage signals or switch signals. This enables remote transmission, analysis and control of electrical signals.Magnetic Flip Flop Level Gauge has direct reading feature with in situ display. There is no need to combine multiple level meters.Because of the magnetic coupling isolator closed structure. Especially suitable for flammable, explosive and corrosive toxic liquid level detection. So that the original complex environment of the liquid level detection means to become simple and reliable security.According to the different installation positions, there are side-mounted magnetic flap level gauge, top-mounted liquid level meter.Scope of application:Widely used in petroleum processing, food processing, chemical industry, activated carbon dosage device, lime dosage system, potassium permanganate dosage equipment, dosing equipment, pharmaceutical, electric power, papermaking, metallurgy, ships and boilers and other fields of liquid level measurement, control and monitoring.Advantages: Magnetic float level meter can achieve high sealing, anti-leakage and suitable for high temperature, high pressure, corrosion-resistant occasions. For high temperature, high pressure, poisonous, harmful, strong corrosive media to show its superiority.

Do you deal in natural gas or you are a part of the company that regulates the water trades or agreements? Flow instrumentation is the most crucial equipment that can play a pivotal role in regulating fluid flow and ensuring an adequate amount of fluid at the required time. Nevertheless, choosing the best flow instrumentation can be a tedious task no matter whether you are a new or seasoned personnel. This guide is specially crafted for people like you who are navigating challenges in finding a flow meter according to their specifications. Ranging from things to consider while buying to the reliable manufacturer for flow instrumentation, this article offers all the information you need to know about flow meters.Things to Consider Before Buying Flow InstrumentsBesides cost, there are many other important factors that you must consider before buying flow instruments. Here is a brief overview of the factors that you should keep in mind while finalizing a flow meter. Process MediaThe attributes of process media are one of the most important factors to consider as various flow meters are designed to give their best performance at specific operating conditions and with different fluids. For instance, a flow meter having wetted moving parts like a turbine meter does not perform well with dirty fluids as they are more prone to mechanical wear and tear. On the other hand, a propeller meter can be used to measure the fluids having small amounts of dirt, sand, or other contaminants. Flow Profile/ViscosityAnother important factor that is important while buying a flow meter to measure fluid is the viscosity of the fluid. In the case of viscous fluids, it is better to use a positive displacement meter as the fluid having laminar flow attributes suits this type of flow meter. However, in the case of viscous fluids with slow flow rates like oils or honey, a volumetric flow meter is a better option.On the other hand, in the case of thin or less viscous fluids having a turbulent flow, the turbine meter is useful. This is because it measures the speed of the fluid by estimating the angular velocity that is directly associated with fluid velocity. Flow RateThe information about the flow rate is also very critical as it determines which size of the flow meter will work for the chosen application. The size of the flow meter if not determined accurately may either lead to the failure or damage of internal constituents. Therefore, as a thumb rule, the size of the flow meter should be capable of achieving 20-80% of maximum flow corresponding with maximum and minimum flow rates. Do you know what will be the benefit of choosing such a flow meter? Choosing the flow meter size using this thumb rule will help the flow meter exhibit optimal performance and durability. AccuracySome applications demand a particular level of accuracy for the chosen flow instrument as imprecise reading may lead to a quality or financial loss. For instance, flow meters that are intended to be used to control chemical feed may need enhanced accuracy than those that are required for general water tracking. Temperature and PressureConditions like temperature and pressure while performing any function are also worth considering when choosing a flow meter. Like flow rate, the temperature, and pressure determine the capability of the flow meter to bear the impacts of thermal energy and other external forces exerted while fluid flow. In addition to this, temperature determines whether the electronic instrument should be mounted across the meter or remote-mounted. Similarly, the operating pressure of the application or function must not exceed the permissible limit of the flow meter as it will deform the meter or disturb its accuracy. Location and InstallationYou can only achieve the required accuracy and high performance when installed at the proper location. Are you confused about what is meant by inaccurate installation?Inaccurate installation refers to the forceful installation of a flow meter within an existing plant or fitting in a tight site. When you are deciding on installing a flow meter, you should consider material, piping size, direction, and configuration. For instance, the piping configuration must be designed in a way that the flow meter is always full of fluid. The direction of the pipe is also significant as it determines whether the flow meter should be installed vertically or horizontally. CertificationsIn the case of some utilities, only those flow meters are preferred that comply with certain certifications. These certifications may include but are not limited to ISO 9001 certification NSF-61, NSF-372, and NIST accreditation. Why Choose Kaidi - Top Five ReasonsBesides considering these important factors, selecting a reliable manufacturer is equally important to get a high-performing and cost-effective flow instrumentation. Kaidi Sensors aims to offer a wide range of customized solutions to automate the industrial processes of numerous industries.No matter whether these industrial processes involve fluid flow, material level, or special temperature or pressure conditions, Kaidi Sensors offers the most reliable solution. It is a level indicator manufacturer and has been striving hard since 2012 to offer innovative, consistent, reliable, and customized automation solutions to industries. With its 20 years of experience in industrial automation, choosing Kaidi Sensors will enable you to enjoy the following benefits● Offers a wide range of products● Provide high-quality customer services according to their needs● Organize technical seminars with clients to further clarify the specifications● Offer workable quotations● Capable of doing mass productionWhat Type of Flow Instruments are Available at Kaidi - Product HighlightsWhether you need a vortex or turbine flow meter or you are looking for more advanced flow meters like electromagnetic or ultrasonic flow meters, Kaidi offers a wide range of flow instrumentation, so you can select the one that suits your requirements. Moreover, if the available flow meters do not fulfill your requirements, you can always request customization and tailor the flow meter according to your needs.  Let’s explore what type of flow meters are available at Kaidi SensorsKaidi QTLU Vortex Flow Meter - Best for Natural Gas/Compressed Air  It is designed to measure gas or compressed air in chemical, petroleum, metallurgical coal, electric power, and other industries. Besides offering a wide range of flow ranges, some of its competitive features are:● Compact structure● High-performance● New signal processing amplifier● High anti-interference capability● Energy efficient● Reliable anti-theft functionalityKaidi Electromagnetic Flow Meter - Best for Wastewater/Chemicals It is designed especially to meet the requirements of water supply companies as it can help in finalizing the water trades and measurements by optimizing the water flow. Some of its competitive features are:● Digital signal processing ● High accuracy● Automatic two-way flow measurement● Unlimited transmission of GSM dataFinal WordsTo conclude, accurate fluid measurement is necessary whenever you are dealing with fluids to ensure optimal use of resources and high performance. Flow instrumentation is the best gadget in this regard, however, some important factors like process media, temperature, pressure, fluid viscosity, flow rate, and certification must be kept in mind while purchasing it. Moreover, you should always choose a reliable manufacturer like Kaidi Sensors which offers a wide range of flow meters and is also willing to offer customized solutions according to your needs.