What is a remote pressure gauge?

Remote Transmitting Pressure Meter                                
    In industrial production and various engineering fields, pressure measurement is a crucial task. Remote transmission pressure gauges, as instruments that can convert pressure values into electrical signals and transmit them remotely, are playing an irreplaceable role. They not only can display the pressure values in real time but also can transmit data to the remote control center, facilitating operators to monitor and adjust at any time.
Today, let's delve into the models, structures and materials of the Fartray pressure gauges.     

                                    
                                                         
    1. Unveiling the Meaning of Model Numbers                                                
        The model number of the remote pressure gauge usually contains a lot of information. The naming rules for the models of different manufacturers may vary slightly, but generally they follow certain patterns. Taking the common YTZ-150 as an example:                                            
       "Y" represents a pressure gauge, which is the universal symbol for pressure gauge products, indicating that it belongs to the category of pressure measurement instruments.                                            
      "TZ" generally indicates the remote transmission method, such as resistance remote transmission. Here, it indicates that this pressure gauge achieves remote transmission of pressure signals through resistance changes.                                            
        "150" indicates that the nominal diameter of the pressure gauge's dial is 150mm. The larger dial diameter makes the readings clearer and is suitable for situations where the pressure value needs to be observed from a distance.                                      
    In addition, some models will be followed by other letters. For example, "Z" might indicate a shock-resistant type, indicating that this remote pressure gauge has a certain ability to resist mechanical vibration and is suitable for working environments with vibrations; "B" might represent stainless steel material, meaning that the pressure gauge selects stainless steel as its material, enhancing its corrosion resistance and suitable for measuring pressure from corrosive media.                                            
                                                    
    2. Comprehensive Analysis of Internal Structure                                                
        The remote pressure gauge is mainly composed of the measurement part, resistance elements, transmission mechanism, housing and connection interface, etc.                                            
Measurement section: The core component is the bourdon tube, which is a hollow metal tube bent into a specific shape (usually in the form of a C). When the pressure of the measured medium enters the bourdon tube, the tube ends will undergo elastic deformation due to the force. The greater the pressure, the more obvious the deformation. This deformation is the basis for pressure measurement, and the subsequent signal conversion and display are all based on this.                                            
Resistor element: Usually, a sliding potentiometer is used. The brush is connected to the transmission mechanism of the spring tube. When the spring tube deforms due to pressure changes, it will drive the brush to slide on the potentiometer, thereby changing the resistance value of the potentiometer. This change in resistance value is proportional to the measured pressure, achieving the conversion from pressure signal to resistance signal.                                            
Transmission mechanism: It is composed of connecting rods, gears, etc. It functions as a "bridge" and an "amplifier". On one hand, it transmits the slight deformation of the spring tube to the brush, causing it to slide on the potentiometer; on the other hand, it amplifies the slight displacement of the spring tube, driving the pointer to rotate on the dial, so as to indicate the pressure value locally.                                            
Shell: Its main function is to protect the internal components, preventing dust, moisture, mechanical collisions, etc. from causing damage to the internal precision parts. Common shell materials include carbon steel and stainless steel. Carbon steel shells have a lower cost and are suitable for general working environments; stainless steel shells have better rust prevention and corrosion resistance properties and are suitable for harsh environments such as those with humid conditions or corrosive gases or liquids.                                            
Connection interface: This is used to connect the tested equipment to the pipeline. The common connection method is threaded connection. For example, the threaded specification of M20*1.5 is quite commonly used. This connection method is convenient for installation and has good sealing performance, ensuring that the tested medium will not leak.                                            
                                                  
    3.Material selection                                                
        The selection of materials for each component of the remote pressure gauge directly affects its performance, applicable range and service life:                                            
        Borden tube material:                                            
Copper alloy: such as phosphor bronze, etc., possess good elasticity and corrosion resistance, and have relatively low prices. They are suitable for measuring the pressure of liquids, gases or vapors that have no explosion hazard, do not crystallize, do not solidify, and do not cause corrosion to copper and copper alloys. For example, they are used for measuring the pressure of common media such as water and air.                                            
Stainless Steel: Materials such as 304/316/316L stainless steel possess extremely strong corrosion resistance. They are suitable for measuring the pressure of liquids, gases or vapors that have a weak alkaline nature but no explosion risk, do not crystallize, and do not solidify. They are widely used in industries such as chemical engineering, petroleum, and pharmaceuticals. The measured media in these industries often have certain corrosive properties.                                            
        Shell material:                                            
Carbon steel: It is cost-effective, easy to process, and can meet the protection requirements for pressure gauges in general environments. In some cases where the corrosion resistance is not highly demanded and the environment is relatively dry with no corrosive substances, such as in ordinary mechanical processing workshops, carbon steel encased remote transmission pressure gauges can be selected.                                            
Stainless Steel: It has excellent anti-rust and corrosion resistance properties. Even in humid or environments with corrosive gases or liquids, it can work stably for a long time. In industries such as chemical engineering, marine engineering, and food processing, where the working conditions are harsh, stainless steel encased remote transmission pressure gauges are a better choice.                                            
        Connector material:                                            
Copper connector: Usually used in conjunction with copper alloy spring tubes, it is suitable for pressure measurement systems without corrosive media. It has good compatibility with copper alloy spring tubes and can ensure excellent connection and sealing performance.                                            
Stainless steel joint: Combined with stainless steel spring tube, it is suitable for situations involving corrosive media. Its corrosion resistance is compatible with that of the stainless steel spring tube, effectively preventing leakage and other problems at the joint due to media corrosion, thereby enhancing the reliability and service life of the entire system.                                                                                      
        Summary:                                            
            The model, structure and material of the remote pressure gauge are interrelated and mutually influential. When choosing a remote pressure gauge, it is necessary to consider these factors comprehensively based on the specific application scenario, the characteristics of the measured medium, and the measurement accuracy requirements. Only in this way can the remote pressure gauge operate stably and reliably during its operation, providing accurate pressure data support for industrial production and engineering construction. We hope that through this introduction, everyone can have a deeper understanding and knowledge of remote pressure gauges.