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China, Chinese Good Price Rosemount 1151 Differential Pressure Transmitter for Industrial Use1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
TransmitterDifferential Pressure TransmitterTransmitterPressure Transmitter
Kerui (Weifang) Automation Equipment Co., Ltd.
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Product DescriptionProduct DescriptionRosemount 1151 Differential Pressure TransmitterA differential pressure transmitter is a device designed to measure the difference in pressure between two points in a system and convert this pressure difference into a standard electrical signal (such as 4-20 mA DC) that can be transmitted to a control system, indicator, or recorder. The Rosemount 1151 DP Transmitter, as a specialized type of this instrument, is capable of accurately measuring differential pressure, as well as gauge pressure, absolute pressure, and flow (when used in conjunction with primary flow elements like orifice plates, venturi tubes, or flow nozzles) and level (in open or closed tanks) in industrial processes.The role of the Rosemount 1151 DP Transmitter in industrial processes is multifaceted. Firstly, it provides critical process data that enables operators to monitor the status of the process in real-time. For example, in a chemical reaction vessel, the transmitter can measure the pressure difference across a filter to indicate the level of clogging, allowing operators to take timely action to clean or replace the filter. Secondly, the accurate pressure measurement data it provides is essential for the control system to adjust process variables (such as flow rate, temperature, and Liquid level) to maintain the process within the desired operating range, ensuring product quality and consistency. Additionally, the Rosemount 1151 DP Transmitter plays a vital role in ensuring process safety. It can be used to monitor pressure in pressure vessels and pipelines, and in the event of abnormal pressure conditions (such as overpressure or underpressure), it can send a signal to the safety system to trigger alarms or initiate emergency shutdown procedures, preventing accidents and protecting personnel, equipment, and the environment.1. Working Principle of Rosemount 1151 Differential Pressure Transmitter1.1 Basic Working PrincipleThe basic working principle of the Rosemount 1151 DP Transmitter involves the measurement of the difference in pressure between two input ports (high-pressure port, HP, and low-pressure port, LP) and the conversion of this pressure difference into a proportional electrical signal. The core of this process is a pressure-sensing element that deforms in response to the applied differential pressure. When the transmitter is installed in a process system, the high-pressure fluid from the process is connected to the HP port, and the low-pressure fluid (or reference pressure, such as atmospheric pressure) is connected to the LP port. 1.2 Role of Key Components in Pressure ConversionThe Rosemount 1151 DP Transmitter consists of several key components that work together to ensure accurate and reliable pressure conversion. Each component plays a specific role in the process, and their performance directly affects the overall accuracy and functionality of the transmitter.1.2.1 Pressure-Sensing ElementThe pressure-sensing element is the heart of the Rosemount 1151 DP Transmitter. It is responsible for converting the applied differential pressure into a mechanical displacement. The most common type of pressure-sensing element used in the 1151 series is a metallic diaphragm or a capsule. These elements are designed to have a high degree of sensitivity and stability, ensuring that they can accurately detect small changes in differential pressure and maintain their performance over time.1.2.2 Strain Gauge BridgeTo ensure the accuracy of the strain gauge bridge, it is carefully calibrated during the manufacturing process. The bridge is also designed to be temperature-compensated, as changes in temperature can cause the resistance of the strain gauges to change, leading to measurement errors. Temperature compensation is achieved by using additional strain gauges (temperature-compensating gauges) that are placed in a location where they are not affected by the pressure-induced strain but are exposed to the same temperature as the measuring gauges. These compensating gauges help to cancel out the temperature-induced changes in resistance, ensuring that the output of the bridge is only dependent on the differential pressure.2.Comparison with Successor Models and Enduring LegacyNo product exists in a vacuum. The Rosemount 1151 was so successful that it set the stage for its own successors.2.1 The Evolution to Rosemount 3051 and BeyondIn the 1990s, Rosemount introduced the 3051 series, which incorporated the same proven capacitive sensor but with refinements:ASIC Technology: Application-Specific Integrated Circuits (ASICs) reduced the number of components, improving reliability and adding computational power.Enhanced Performance: Even better accuracy (±0.04%) and stability.Advanced Diagnostics: More sophisticated self-diagnostics and predictive maintenance features.Digital Bus Support: Native support for full digital fieldbus protocols like Foundation Fieldbus and Profibus-PA.Later platforms like the Rosemount 3051S (Superior Performance) and 3051T (Turbine Flow Meter) continued this evolution. However, the fundamental sensing principle remains a direct descendant of the 1151.2.2 Why the 1151 Remains Relevant Today?Despite being officially superseded by newer models, millions of Rosemount 1151 transmitters remain in service. The reasons are a testament to its brilliant design:Proven Reliability: Its Mean Time Between Failures (MTBF) is measured in decades. Plants trust it implicitly for critical applications.Lower Initial and Lifetime Cost: While newer transmitters may have more features, the 1151's purchase price and phenomenal stability result in a very low total cost of ownership over its immense lifespan.Spare Parts and Knowledge Base: A massive global inventory of spare parts and a generation of technicians and engineers who are intimately familiar with its operation and maintenance ensure its continued support."If It Ain't Broke, Don't Fix It": In an industry where unplanned downtime can cost millions per hour, replacing a perfectly functioning, highly accurate 1151 with a newer model is often an unnecessary risk and expense.SpecificationAccuracy±0.075% of calibrated spanStability±0.1% of URL (Upper Range Limit) per yearTemperature Effect±0.5% of span per 28°C (50°F)Static Pressure Effect±0.25% of span per 1000 psiRange ratio15:1Damping time0.1 to 16.0 secondsOutput signal4-20 mA DCPower supply12 to 45 V DCCompany ProfileKeRui (Weifang) Automation Equipment Co. Ltd. Has maintained a cooperatve relationship with Rosemount for 15 years, and our purchase quantity has reached 20,000 units.We supplied the tuning fork level gauge to the Rosemount factory and have been well received by the Beijing factory. We have cooperated with Yokowaga and maintained a cooperative relationship for 8 years, and our purchase quality has reached 7000 units.The companies we have cooperated with:1. Awarded "Outstanding Supplier by Yanchang Petroleum in 20082. In December 2012, our company was awarded the "Excellent Equipment Service Award" for the expansion project of units 6 and 7 of the Guangdong Guohua Yuedaishan Power Plant3. Awarded "Outstanding Supplier by Yaxing Group in 20134.200 transmitters for Haihua Group's ethylene debottlenecking transformation project in 2015.5. In 2018, we were rewarded as a National Nuclear Power Instrumentation Industry Measurement and Testing Alliance member.6.160 transmitters and 20 electric autuators for the Shandong Laigang Yongfeng Steel expansion project in 20197.In 2022, Jinneng Chemical (Qingdao) Co., Led/ Jinneng 2x450,000 tons/ year high-performance polypropylene project (newly built) equipped 460 transmitters from our company.8. In 2022, Shandong Qinghe Chemical Technology Co., Ltd.s hydrogen peroxide method epoxy propane device and supporting hydrogen peroxide device expansion project used 253 pressure transmitters.9.In 2022, the Wanhua Chemical HTN project NPG installed 320 transmitters and 50 sets of valve positioners.CertificationsOur ServiceOEM / ODM servicesTo meet the user diversified requirement, Holykell have established a set of customer service and technical support system with OEM / ODM order as the center, and responded and Handle the customer's requirements in a timely manner to ensure accurate delivery time and product quality.Order servicesFastest reply:Professional sales engineers 7/24 online servicesPayment terms:T/T ,Western union, Paypal, Credit Card, L/C othersFast delivery: within 24 hours release the cargo (normal spec.), Customized 7-12 days after payment . MAINTENANCE & AFTER-SALES SERVICESCustomer Feedback: Sales engineers and technical engineers will be one-on-one service for you to exclude all obstacles when use our sensors.Warranty period: 12 monthsProduct life-long maintenance: Holykell can provide you with the maintenance of the whole life of the sensorsPackaging & ShippingFAQQ: How long will you give me the reply? A: We will reply to you as soon as we see the information Q: What is the delivery time?A:The products in stock will be shipped after receiving the payment, and the products thatneed to be ordered are subject to the factory time. Q: How about your package?A: Do not worry about the package, we have rich experience in packing. Q: How about the payment terms?A:You can choose T/T. Q: What is the MOQ?A:1PC. Q: Can l get a lower price if l order large quantities?A: Yes, cheaper prices with more bigger size orders. Q:After sales and warranty?A: We provide one year warranty lifetime technical support services. Q:How about after-sales service?A: We are 24 hours online, if you have any problem, please contact us directly.
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