I. Industry Development : After decades of development, especially in the last decade, China's electronic instrumentation industry has initially formed a relatively complete product range, possessing a certain production scale and development capabilities. Display and control instruments have become one of the largest manufacturing sectors in China. II. Product Types : The AI ​​display and control instrumentation field has reached international advanced levels in recent years and is gradually moving towards artificial intelligence. Products include single-channel PID controllers, four-channel PID temperature control modules, flow totalizers, single-display or multi-channel display alarms, electrical display instruments (AC current, voltage), digital touch paperless recorders, analog paperless recorders, switch and analog input/output modules, and, by adding communication functions, RS485-based FCS fieldbus-type computer monitoring systems with communication distances up to 1200 meters. Installation options include panel mounting or DIN rail mounting intelligent modules. Combined with computers and touchscreens, these modules can form small DCS systems, which is a good choice. III. Controlled Objects : AI display control instruments are suitable for precise measurement and PID regulation control of temperature, pressure, flow, liquid level, humidity, etc. Actuator types include electric regulating valves, pneumatic regulating valves, solenoid valves, AC contactors, solid-state relays, thyristors, etc. IV. Service System of the Display Control Instrument Industry : Currently, products have wide applications, and users have varying levels of technical expertise. Technical services have reached new requirements, necessitating the establishment of a comprehensive service system. For example, Xiamen Yudian Automation Technology Co., Ltd. has established a complete nationwide service network, with branches or offices in Beijing, Shanghai, Tianjin, Chongqing, Guangzhou, Shenzhen, Shantou, Nanjing, Wuxi, Shenyang, Dalian, Changchun, Harbin, Jinan, Qingdao, Wuhan, Changsha, Hangzhou, Wenzhou, Kunming, and other locations, providing customers with fast and comprehensive pre-sales and after-sales services. With its Hong Kong parent company as its overseas market headquarters, it has established overseas marketing and service branches in Europe, North America, and Oceania to serve overseas markets. Global warranty is provided for instruments installed in customer equipment. Regardless of where the equipment is sold globally, third-party end-customers can request support from the nearest Yudian sales and service center for instrument-related repairs or technical services. Yudian has established multiple sales and service outlets both domestically and internationally, dedicated to providing attentive service to every customer. A toll-free number provides customers with convenient communication opportunities. Whether it's adding/modifying orders, seeking technical consultation, or even filing a complaint, the 800 number ensures customers don't incur extra costs for contacting us. For more information, please visit Xiamen Yudian Automation Technology Co., Ltd. http://www.yudian.com/ Technical Service Department Toll-Free Hotline 800 858 0995 Maintain close contact. V. Application Areas and Coverage Application areas are wide-ranging, covering industry, agriculture, transportation, science and technology, environmental protection, national defense, education and health, and daily life. Its products are mainly used in chemical, thermal power, petrochemical, pharmaceutical, metallurgical, machinery, electric furnace, heat treatment, food, papermaking, and scientific research fields. There is strong market demand and huge development potential. Specific target users can be described from the following aspects: 1. Agriculture, forestry, animal husbandry, and fisheries: (a) Storage of fresh fruits, vegetables, and other agricultural products; planting and breeding of plastic greenhouses and horticultural flowers; animal husbandry for various livestock and poultry products; hatching and breeding activities of precious animals, fish fry, and fingerlings; environmental monitoring; using wet-bulb and dry-bulb temperature and humidity display instruments to monitor changes in temperature and humidity. The wet-bulb and dry-bulb humidity measurement method uses an indirect measurement method. The humidity value is obtained by measuring the temperature of the dry bulb and wet bulb and then calculating it. Therefore, there is no strict limitation on the operating temperature, and humidity measurement in high-temperature environments will not damage the sensor. The maintenance of the wet-bulb and dry-bulb humidity measurement method is quite simple. In actual use, it is only necessary to add water to the wet bulb and replace the wet bulb gauze regularly. Compared with electronic humidity sensors, the wet-bulb and dry-bulb humidity measurement method does not suffer from aging or decreased accuracy. Therefore, the wet-bulb and dry-bulb humidity measurement method is more suitable for use in high-temperature and harsh environments. Select the instrument model according to the measurement and control accuracy requirements; AI-706AJ0J0L1L1S type single-display or multi-channel display alarm controller is recommended; ⑵ Grain, tobacco, medicinal materials, and raw tobacco leaf curing; wood drying and processing; dairy processing of livestock products; fur production; animal disease prevention and control units. Cold storage, liquid nitrogen stations, technical testing and control, regulating and controlling temperature, pressure, liquid level, and equipment start-up and shutdown; it can also realize real-time remote display and control monitoring of various data such as temperature and humidity on a computer. AI-808AX3L1L1S4 type control instrument is recommended; 2. Consumer goods manufacturing and processing industry: This refers to processing directly using raw materials: refining and polishing vegetable oils and animal fats; canning, sealing, sterilizing, and cooling food to achieve commercial sterility requirements; condiment production (soy sauce, vinegar, pharmaceutical fermented products), antibiotics, alcoholic beverages, citric acid, soft drinks, starch production (using starch as raw material through cooking and grain milling), sugar production (using enzymatic or acidic conversion), and alcohol production through processes such as saccharification and distillation. This requires temperature, pressure, and flow measurement, regulation and control, paperless recorders, and computer network monitoring. Based on the required measurement and control accuracy, the recommended instrument model is a single-display or multi-channel display alarm instrument, AI-706AJ0J0L1L1S; the recommended regulation and control instrument is AI-808AX3L1L1S4. 3. Machinery manufacturing supporting industry: 3.1 Manufacturing and supporting applications of equipment for industrial or laboratory electric furnaces, such as box furnaces, bogie furnaces, pit furnaces, etc.; and electric heating and oil burners for tunnel kilns. 3.2 Controlling the heating of electric furnaces using thyristors and controlling fuel oil using regulating valves; 3.3 Controlling the annealing and quenching temperatures in the manufacture of mechanical parts, metal parts, and structural components, including acid treatment and heat treatment; 3.4 Controlling the temperature of melting furnaces in the metal smelting and sintering industry, referring to the smelting of common non-ferrous metal ores such as iron, lead, zinc, nickel, cobalt, tin, antimony, aluminum, magnesium, mercury, cadmium, and bismuth; 3.5 Controlling the temperature of melting furnaces in the manufacturing of abrasives and grinding wheels, including friction plates, grinding wheels, grinding slurries, sandpaper, corundum, artificial crystal, and powder metallurgy sintering; using equipment such as box-type high-temperature electric furnaces; 3.5 Controlling the secondary processing of rubber, plastics, and plastic materials; manufacturing of daily chemical equipment; manufacturing of special equipment for the food, beverage, and tobacco industries; manufacturing of paper and paper product equipment; manufacturing of optoelectronic devices and other electronic devices; manufacturing of special equipment for rubber processing; manufacturing of special equipment for ceramic and enamel product production; and manufacturing of stationery and sports goods, requiring supporting display and control instruments. Specific plastic equipment includes plastic grinders, plastic mixers, plastic blenders, kneaders, plastic refining machines, plastic granulators, plastic recycling and granulation machinery, plastic pelletizers, screening machines, crushers, plastic thermoforming machines, plastic welding machines, plastic heat sealing machines, plastic hot stamping machines, plastic vacuum evaporation machines, and many others that require matching display and control instruments, as well as ovens for aging and drying treatment. Recommended electric furnace heating type AI-808AK3L1L1S; three-phase thyristor controls the furnace heating. Recommended fuel oil temperature control type AI-808AL5L1L1S; controls the tunnel kiln oil burner valve by controlling the forward and reverse rotation of the regulating valve. Recommended human-machine interface (HMI) operation screen: AI-2057C/G and AI-2080C touch-screen paperless recorders are suitable for the electric furnace industry and offer powerful functions; full-screen display of all data: the touch-screen digital paperless recorder is based on a traditional HMI touchscreen and is equipped with a standard CF card data storage module; it is a paperless recorder developed using intelligent, modular, and networked design concepts; it can be used simply by connecting an RS485 communication cable; flexible application: it adopts an upper-computer + lower-computer structure, with the lower-computer being AI series instruments; each recorder can select 2, 4, 6, 8, 12, 16, 18, 22, or 32 channel software types; freely editable AI channel hardware models. It features multi-channel digital and curve full-screen display and data storage; user-friendly operation; 50 milliseconds data refresh time per channel; optional external 1GB electronic hard drive as standard, expandable with 1-4GB CF card storage; data is saved according to the first-in, first-out principle, with transferred data points saved immediately; data can be directly opened on a PC via a card reader, backed up to a computer via serial port, and opened in CSV format using Excel; when storage is unavailable, it can be used as a terminal display screen, with the host memory capable of recording approximately one hour of data and alarm parameters, and storing 15 temperature rise and fall program recipes. 4. Process Control Systems: Chemical Production Lines: Synthesis, Refining Towers, Concentration and Extraction, Thermal Power Auxiliary Systems, Petrochemical Refining, Paper Industry, Sugar Industry, etc. The wide range of applications in this industry necessitates the measurement, regulation, control, and recording of temperature, pressure, and flow rates. This requires the establishment of an RS485-based FCS fieldbus-type computer monitoring system. Recommended: Electric Furnace Heating AI-808AK3L1L1S model; Thyristor control for furnace heating. Recommended: Fuel Oil Temperature Control AI-808AX3L1L1S4 model; Control valves for pipeline flow control. Recommended: Human-Machine Interface (HMI) Flowchart Control: The AI-2057C/G and AI-2080C models of touch-screen paperless recorders use vivid and illustrative graphics to describe the on-site production process, providing a microcosm of the entire industrial site. It's not just a picture; it displays control buttons and real-time data simultaneously, enabling operators to achieve highly intuitive remote control. The software editor can also realize the function of soft PLC switch output, clock timing control, and switch output counting function. It is recommended to build an FCS fieldbus-type computer monitoring system based on RS485, with a communication distance of up to 1200 meters; 5. Public utility industry: 5.1 Power supply, power plant steam transmission, gas plant, liquefied petroleum gas spherical tanks, natural gas transmission and distribution, tap water production and supply, sewage treatment and its recycling activities. Liquid level measurement and flow metering are often required. Recommended flow meter: AI-808HAI4L1L1S is used to accumulate the amount of flow for temperature and pressure compensation of superheated steam flow, and can also control the operation of filling equipment in batches; AI-704MJ5L1L1 single display or multi-channel display alarm controller is recommended to be used with touch screen to centrally display the pressure and liquid level status of liquefied petroleum gas spherical tanks. 5.2 Railway, road, tunnel and bridge engineering construction, railway, subway, light rail, tram subgrade construction and track laying construction; maintenance of urban roads, bridges and tunnels, geological exploration industry. For example: Bridge cement curing tanks; AI-808PAL5L1L1S type control valve for steam heating of cement curing tanks is recommended. An RS485-based FCS fieldbus computer monitoring system with a communication distance of up to 1200 meters is also recommended. 5.3 Monitoring of air conditioning systems, air purification and regulation, lighting, and medicines in comprehensive building factories, hospital operating rooms, and other health and epidemic prevention institutions at all levels. For example: monitoring of operating room temperature and humidity. AI-2080 touchscreen control system is recommended, along with AI series instruments to control temperature, pressure, flow, and motor start/stop. 5.4 Testing, inspection, and identification activities conducted by universities, scientific research laboratories, and technical testing institutions for animals, plants, industrial products, commodities, special technologies, achievements, and other items requiring identification. Laboratory equipment requires applications such as electric heating blowers, water bath temperature control, and bacterial culture room temperature monitoring. AI-708AK1L1L1S small control cabinet is recommended for operating electrically heated equipment. 5.5 Zoos, aquariums, marine parks, and underwater worlds; animal husbandry; wildlife breeding centers; wildlife conservation; environmental temperature and humidity control. For example, the Dalian Tiger Beach Rare Animal Museum uses AI series instruments to control the room's temperature and humidity. The AI-808AL5L1L1S model is recommended for temperature control. It is recommended to build an RS485-based FCS fieldbus computer monitoring system with a communication distance of up to 1200 meters. VI. Conclusion: The AI ​​series dual-digital display controller uses microcomputer data analysis and control, analog and digital multi-filtering, and touch switch software parameter settings, resulting in high accuracy and strong anti-interference capabilities. The instrument uses red and green dual-row digital tubes to simultaneously display measured and set values. The instrument uses a red digital tube to display both measured and set values. PID parameters, hysteresis, upper and lower limit alarm values, percentage during manual output, and error shift (SC) caused by sensors can all be set and displayed in real time via the panel touch switch. The instrument can input various sensor signals, including voltage and current. It can output relay contact on/off signals and active switching signals to drive solid-state relays. In particular, it can output phase-shifting or zero-crossing pulse signals that directly trigger thyristors, and can limit the maximum power consumption of the controlled equipment, completing control and measurement functions in one step. This improves reliability and control performance while reducing costs, making it more suitable for domestic usage conditions and habits. With appropriate sensors, it can also be used for displaying and controlling parameters such as pressure, flow rate, and liquid level. The display and control instrument uses communication to build an RS485-based AIFCS fieldbus-type computer monitoring system to meet the needs of the rapid development of automation technology.