IPDB › China Industry › Instruments & Meters
China, Chinese High-Performance Rosemount 5081 Explosion-Proof Transmitter for Industrial Use1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
TransmitterOther TransmittersTransmitterRosemount Transmitter
Kerui (Weifang) Automation Equipment Co., Ltd.
Preview:
Product DescriptionProduct DescriptionRosemount 5081 Explosion-Proof TransmitterThe Rosemount 5081 Explosion-Proof Transmitter, a specialized offering from Emerson Process Management, is engineered to address the critical need for safe and reliable process measurement in hazardous environments. Unlike standard transmitters that operate only in non-explosive settings, the 5081 is designed with robust explosion-proof (Ex) construction, enabling it to function seamlessly in areas where flammable gases, vapors, dust, or fibers are present. This makes it an indispensable tool for industries such as oil and gas, chemical processing, pharmaceutical manufacturing, and mining—where even a small electrical spark could trigger catastrophic explosions.Emerson, a global leader in industrial automation and safety solutions, developed the 5081 series to meet the strictest global explosion protection standards. The transmitter integrates high-precision pressure measurement capabilities with advanced Explosion-proof design, ensuring that it not only delivers accurate data for process control but also prevents the ignition of hazardous atmospheres. By combining reliability, accuracy, and compliance, the Rosemount 5081 minimizes operational risks, ensures regulatory adherence, and protects both personnel and critical infrastructure.A key distinction of the 5081 is its versatility in handling various pressure measurement tasks—including gauge pressure (GP), absolute pressure (AP), and differential pressure (DP)—while maintaining its Explosion-proof integrity. Whether deployed in offshore oil platforms, chemical reactors, or coal-fired power plants, the transmitter's rugged design and advanced sensor technology ensure consistent performance even in extreme temperatures, high pressures, and corrosive conditions. 1. Explosion-Proof Technology Principles of Rosemount 5081To understand the safety capabilities of the Rosemount 5081, it is essential to explore the underlying explosion-proof technologies that define its design. The transmitter adheres to two primary Explosion-proof protection concepts: flameproof enclosure (Ex d) and intrinsically safe (Ex i)—depending on the model and application requirements. 1.1 Flameproof Enclosure (Ex d) DesignThe flameproof enclosure, designated as Ex d under international standards (such as IEC 60079-1 and NEC 505), is the core of the Rosemount 5081's explosion-proof capability. This design is based on the principle of containing any internal explosion within the transmitter's housing and cooling the hot gases before they escape—ensuring that the external environment remains below the ignition temperature of flammable substances.1.1.1 Enclosure ConstructionThe 5081's flameproof enclosure is fabricated from high-strength materials, typically cast aluminum alloy or stainless steel (316L), chosen for their ability to withstand the pressure of an internal explosion and resist corrosion. The enclosure features thick walls and reinforced seams to contain explosions with pressures up to 1.5 MPa (218 psi)—far exceeding the maximum pressure generated by potential internal electrical faults (such as short circuits or arcing).1.1.2 Flame Path SealsA critical component of the Ex d design is the flame path—the interface between the enclosure's main body and its covers, cable glands, or connectors. The flame path is precision-machined to create a narrow, uniform gap (typically 0.1–0.2 mm for gas applications) that acts as a labyrinth seal. If an internal explosion occurs, the hot gases and flames are forced through this narrow gap, where they are cooled by heat transfer to the enclosure walls. By the time the gases exit the gap, their temperature is reduced below the auto-ignition temperature of the surrounding flammable atmosphere (e.g., 280°C for methane), preventing ignition.The Rosemount 5081's flame path is subjected to rigorous quality control during manufacturing, including dimensional inspections and pressure testing, to ensure that it maintains its integrity over time. 2. Key Features and Specifications of Rosemount 5081The Rosemount 5081 Explosion-Proof Transmitter combines advanced Explosion-proof technology with high-performance pressure measurement capabilities2.1 High-Precision Pressure MeasurementAt the core of the 5081 is its ability to measure pressure with exceptional accuracy—critical for maintaining process efficiency and safety in hazardous industries. The transmitter offers three primary pressure measurement modes:Gauge Pressure (GP): Measures pressure relative to atmospheric pressure, with a range of 0–10 kPa to 0–100 MPa (0–1.45 psi to 0–14,503 psi). Accuracy is ±0.075% of full scale (FS) for most ranges, ensuring precise monitoring of process pressures in applications such as chemical reactors and oil pipelines.Absolute Pressure (AP): Measures pressure relative to a perfect vacuum, with a range of 0–10 kPa to 0–100 MPa (0–1.45 psi to 0–14,503 psi). The 5081 uses a capacitive sensor for pressure measurement—renowned for its stability and resistance to drift. The sensor features corrosion-resistant diaphragms (made of Hastelloy C-276 or 316L stainless steel) that protect against harsh media such as acids, alkalis, and hydrocarbons. Additionally, the sensor is equipped with temperature compensation to minimize the impact of ambient temperature changes on measurement accuracy—ensuring reliable performance even in environments with temperature fluctuations (e.g., -40°C to 85°C).2.2 Robust Explosion-Proof ConstructionThe 5081's construction is engineered to withstand the most demanding hazardous environments, with a focus on durability and Explosion-proof integrity:Ingress Protection: The enclosure meets IP66/IP67 standards, meaning it is completely dust-tight (IP6X) and protected against temporary submersion in water (IPX7).Temperature and Pressure Ratings: The 5081 operates in a wide temperature range of -40°C to 85°C (-40°F to 185°F) for the electronics, with optional high-temperature models capable of withstanding up to 125°C (257°F).Vibration and Shock Resistance: The transmitter is designed to withstand mechanical vibrations up to 5 g (10–2000 Hz) and shock up to 50 g (11 ms)—ensuring reliable operation in applications such as rotating equipment, pipelines with fluid hammer, or mining operations.SpecificationPowerMinimum 12 VDC, maximum 42.4 VDCAmbient temperature-20°C to 65°C (-4°F to 149°F)Enclosure protectionHeavy-duty cast aluminum housing with epoxy coatingProtection levelNEMA 4X (IP65)Communication ProtocolHART or Profibus DPMeasurement range examplepH: 0-14; ORP: -1400 to +1400 mVPower supply voltage12-42.4 VDCDisplayTwo-line LCDCompany 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.Our 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 & ShippingFAQQ1: How long will it take you to give me the reply?A: We will reply to you as soon as we see the informationQ2: What is the delivery time?A: Our delivery time is within 3- 7 days after we get your payment; for large qty mass orders, the time should be confirmed again for youQ3: How about your package? A: Do not worry about the package. We have a lot of experience in packing, and all our packages are wooden case packages.Q4: How about the payment terms?A: You can choose T/T.Q5: Do you provide samples? A: Yes, we have materials in stock to help you get the samples as soon as we can.Q6: What is the MOQ?A:1PC.Q7: Can I get a lower price if I order large quantities? A: Yes, cheaper prices with larger orders.Q8: Why choose us?We have a perfect customization, not only to provide you with quality products, but also to have a professional customer service team available at any time to provide you with support. We pay more attention to establishing a long-term cooperative relationship with you to achieve continuous business growth.Q9: How can we guarantee quality?We have strict requirements on the quality of our products, and we will conduct a final inspection of our products when we ship them.
Purchasing Request
Note: Send your purchase request, and we will screen suppliers or manufacturers for you free of charge...