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.   

I. Differential pressure transmitter working principle:Fluid flow through the pipeline throttle device, the formation of local contraction at the throttle, so that the flow rate increases, the static pressure decreases, so the formation of pressure drop, that is, the differential pressure, the media flow the larger the flow rate, before and after the throttle device produces a greater pressure difference, so the differential pressure flowmeter can be measured by measuring the pressure difference in order to measure the size of the fluid flow.Differential pressure flowmeter consists of a primary device and a secondary device. Primary device called flow measurement element, which is installed in the measured fluid pipeline, resulting in a pressure difference proportional to the flow rate (flow rate) for the secondary device for flow display. Secondary device called display meter. It receives the differential pressure signal generated by the measuring element, and will be converted to the corresponding flow rate for display. Differential pressure flowmeter primary device is often a throttling device or dynamic pressure measurement device (Pitot tube, homogeneous tube, etc.). Secondary device for a variety of mechanical, electronic, combined differential pressure meter with a flow display instrument. Differential pressure sensitive components of the differential pressure gauge are mostly elastic components. As the differential pressure and flow rate is square root relationship, so the flow rate display instrumentation are equipped with a square device in order to linearize the flow rate scale. Most of the instruments are also equipped with flow accumulation device to display the cumulative flow for economic accounting. This method of measuring flow using differential pressure level indicator has a long history, more mature, countries around the world are generally used in more important occasions, accounting for about 70% of the various electromagnetic flow measurement methods. Power plant main steam, feedwater, condensate and other flow measurement are used in this meter.The measured medium flow rate is proportional to the open square of the differential pressure. Most meters also have a flow accumulation device to display the cumulative flow for economic accounting.Structure:Throttling element: A device installed in the pipeline to generate differential pressure level indicator.Pressure conduit: Takes the differential pressure generated before and after the throttling device and transmits it to the pressure transmitter.Differential pressure transmitter: The differential pressure generated is converted into a standard electrical signal (4~20mA or FF).Valve set: Used to connect the pressure guide tube with the differential pressure transmitter assembly to prevent the membrane box from being damaged by the single cavity pressure when the transmitter is put into operation.Due to the different geometrical profiles of the throttling elements, the different ways of taking pressure and the different specific technological conditions of the application, the specific structures of the throttling devices are also varied.Standard throttling device: according to the unified standard regulations for the design, production and installation of the standard differential pressure device, do not have to go through individual calibration can be used.Non-standard throttling device: refers to the test data is not very sufficient, design and production must be individually calibrated to use the differential pressure device.Common standard throttling devices: standard orifice plates, standard nozzles, classic venturi, venturi nozzlesCommon types of differential pressure flow meters in industryOrifice plate flowmeter, balance flowmeter, wedge flowmeter, Aniuba flowmeter, Venturi flowmeter and so on.Common Differential Pressure Flow Meter Throttling Elements                                                                                                                                                                                          （standard orifice plate）                                                                                                                                                                               （Wedge Type Throttle Elements）                                                                                                                                                                                                  （Venturi throttle）Valve manifoldsDifferential pressure flowmeter connection commonly used valve group has three valve group and five valve group.Three-valve group and five-valve group put into use steps:1, open the balance valve, so that the high and low pressure side at the same time under pressure2、Open the high pressure side shut-off valve3、Close the balance valve4、Open the low-pressure side shut-off valveNote: When opening the high and low pressure side shut-off valve, you should first loosen a circle to confirm that the instrumentation side of the connection is not leaking before the valve is fully open.Steps for deactivating three-valve and five-valve manifolds:1、Close the low-pressure side shut-off valve2、Open the balance valve3、Close the high-pressure shut-off valve4、Close the balance valveNote: The operating principle of the three-valve group is to avoid heat or one-way pressure on the measuring instrument, and not to let the isolation fluid in the guide tube or isolation tank disappear.II. Features and applications of differential pressure flow meterOrifice plate flowmeter:The structure is easy to copy, simple, solid, stable and reliable performance;Wide range of applications, including all single-phase fluids (liquid, gas, steam);Narrow range, the general range of degrees only 3:1 ~ 4:1;There are longer straight pipe length requirements before 10D after 5D;Pressure loss;Corrosion, wear and tear, scaling, dirt sensitive, long-term use of precision is difficult to guaranteeBalance flow meterLow straight pipe section requirements, as low as 0.5D before and 0.5D after;Low permanent pressure loss;Long service life;Wide measuring range;Simple installation;Measurement of bidirectional flowWedge Flow MeterSuitable for low viscosity large flow, high viscosity small flow fluids;Unique structure, no deposition, no clogging, wide range of application, especially for high viscosity, crystallization mixture, dirty liquids, for DN25-DN1200 pipeline;Straight pipe section requires 5D before and 2D after;Bidirectional flow can be measured;Good abrasion resistance, high precision in long-term operation, easy installation and maintenance;III. Installation matters and requirements of differential pressure flow meter:1, before and after the installation of the original throttle straight pipe section in differential pressure transmitter working principle, the longer the better, but the actual project is not possible, in order to ensure that the throttle original before 10D after 5D;2, throttle original opening center needs to be concentric with the pipe centerline, the deviation shall not exceed 1 degree;3, the installation of the orifice plate, to determine the direction of the orifice plate throttling member with the pipeline media direction in line with the orifice plate reverse installation will cause the flow rate indication becomes smaller;4, the flow beam in the pipeline should be stable;5, the measured medium in the flow through the throttle device should not occur phase change;6, for the newly installed piping system must be flushed in the pipeline before the installation of the throttle deviceCommonly Used Pressure Taking MethodsAngle connection pressure taking: applicable to: standard orifice plate, nozzleTwo pickup ports are mounted at an angle upstream and downstream of the throttling element. The upstream and downstream pickup tubes are located at the front and rear end faces of the orifice plate (or nozzle). Angle pickup includes separate drilling and ring chamber pickup. Individually drilled holes are used in DN400 and above caliber occasions, generally for the ring chamber pressure extraction.Flange pressure extraction: applicable to: standard orifice plate, wedgesThe distance between the axes of the upstream and downstream pressure-taking holes and the end faces of the upstream and downstream sides of the orifice plate is 25.4±0.8mm (1inch). Pressure-taking holes are opened on the flanges of the upstream and downstream sides of the orifice plate.Diameter taking pressure: applicable to: standard orifice plate (large diameter), long diameter nozzleThe distance from the axis of the upstream pressure-taking hole to the upstream end face of the orifice plate is 1Dm±0.1Dm, and the distance from the axis of the downstream pressure-taking hole to the downstream end face of the orifice pole is 0.5Dm.Installation of the pressure take-off portWhen measuring gas flow, in the upper half of the process piping, as shown in the figure.When measuring liquid flow, in the lower half of the process piping within 0~45° angle with the horizontal centerline of the process piping, as shown in the figure.When measuring steam flow, in the upper half of the process piping within 0~45° angle from the horizontal centerline of the process piping, as shown in Fig.

Efficiency and effectiveness are the most demanding aspects for any industrial process and companies dealing in various businesses are striving hard for it. Whether you are dealing in liquid or solid media level measurement is inevitable to achieve efficiency by ensuring optimal resource use and avoiding spillage or other accidents. A rotary paddle switch is a widely used level measurement tool to measure the level in solid media whether it is big hoppers, containers, or tanks. By measuring the level with fine accuracy, this tool can help industries achieve that envisioned efficiency. However, are all rotary paddle switches reliable? Kaidi is an experienced level indicator manufacturer and it has a huge range of paddle switches that can work for your industrial process. To see whether your industrial process can become efficient with this level measuring tool or not, keep reading.  How Does a rotary Paddle Work?The first thing that you should understand is the operating principle behind the rotary paddle level switch. The operation of the level switch paddle type is a result of equilibrium among the following forces● The force applied by the motor return spring● Compression force of microswitch on signal circuit● Resistance torque due to bearings and seals● Reactional torque across the material to be detectedThings to Consider Before Buying a rotary Paddle SwitchDo you know which factors are important to consider when buying a rotary paddle level switch? Let’s have a look at the factors that you should keep in mind while purchasing a rotary paddle switch. DensityEach material possesses a minimum density, therefore, when selecting a paddle, you should choose a paddle having a density greater or equal to the material so it can detect the material density. This is the reason that it is suggested that a propeller designed for heavy to medium material is not suitable for very light materials like ask as the propeller will not have adequate friction across its surface to detect On the other hand, paddles designed for light materials are even suitable for heavy materials if they are safeguarded from direct falls. In such cases, it is suggested to protect that part of the indicator inside the silo. Installation DiameterIn those cases, where it is impossible to mount the paddle from inside, it is essential to consider the minimum installation diameter. The installation diameter refers to the size of the smallest hole through which the paddle passes. In the case of one blade, it passes via a small diameter whereas, in the case of multiple blades, larger installation holes are needed. Paddle Diameter while RotationDo you know what is meant by paddle diameter? It refers to the diameter of an ideal cylinder employed by the paddle during its rotation. While buying a rotary level switch, you must always keep in mind that the paddle must be given free space to rotate freely around its trajectory without any hindrances like protections, walls of silo, or reinforcements. MaterialPlastic paddles are the ideal choice for traditional installations because they combine economy and durability. CAMLogic plastic paddles are made of PA6 polyamide for chemical, abrasion, and mechanical resistance.In circumstances requiring high mechanical qualities, high-temperature use, or static electricity risk, EN 1.4403 (AISI 304) stainless steel paddles are suitable for food contact.All PFG05, PFG57, and PFG09 rotating level indicator paddles are interchangeable. Browse our selection or contact us to get the best fit for your plant.Number of BladesBlades within the rotary level switch are also an important factor. Choose paddles with 2 or 3 blades when put in cyclonic filters or other areas with high air currents to balance aerodynamic forces and avoid rotational level indicator false indications.Why Prefer Kaidi Sensors Over Others?  Kaidi Sensors is a reliable name among the name of level indicator manufacturers. With its professional team, mature technology, and high-quality products, choosing Kaidi will never disappoint you. The company offers a wide range of technologies that can be used among the industrial processes of multiple industries ranging from water, gas, and chemical to food, plastic, pharmaceutical, and other industries. Moreover, the provision of customized solutions according to your requirements is the most competitive feature of Kaidi that distinguishes it from others. After receiving initial specifications, they arrange detailed technical session to fulfill your requirements and give three price quotations, so you can choose the one that best suits your industrial process. Let’s see what type of rotary paddle switches are available at Kaidi Sensors and how you can improve your industrial processes by using these rotary paddle switches. Rotary Paddle Switch at Kaidi - Product Highlights Kaidi has a huge range of rotary paddle-level switches. Each of these rotary paddle switches is designed for specific applications having different operation conditions like temperature, pressure, voltage, and speed. Therefore, to acquire maximum benefit from your chosen rotary level switch, you must be clear about the intended use and operating conditions of the industrial processes. Let’s have a look at some of the rotary paddle level switches at Kaidi● Kaidi KDSS86 G1′′ Thread SUS304 Rotary Paddle Level Switch - Best for Storage Tank● Kaidi KD Rotary Resistance Level Switch - Best for Block, Powder, and gel● Kaidi KDSS86GT Hi-Temperature Shaft Length Adjustable Type Rotary Paddle Level Switch● Kaidi KDSS86FT 400℃ 1/2'' PF rotary Level Switch - Best for the petrochemical and metallurgical industry● Shaft (stem rod) protection high-temperature rotary paddle level sensor for bin solid powder container- Best for chemical, food, and plastic industry Some of the common features among these level switches that make these products stand alone in the market are● All products are composed of high-quality and durable material● Easy to install, operate, and maintain● Operating conditions and parameters for all products are described in detail● All products possess installation requirements and guide● Protection of the user is ensured by complying relevant protection grade and giving cautions and warnings● Reliable customer servicesFinal WordTo conclude, a rotary paddle switch is a level measurement tool used in the case of solid media. Integrating this tool within your industrial process will enable you to avoid any material loss or spillage, thus increasing your operational efficiencies. Kaidi is the most reliable manufacturer to buy paddle switches for your industrial process. No matter in which industry you operate and what type of operating conditions your process needs, the company offers a huge range of switches to cater to your needs. Moreover, the option of customization is also available. So, you can confidently rely on Kaidi Sensors to make your industrial processes fast and efficient.