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China, Chinese Brand New Dwyer 2000 Series Mechanical Differential Pressure Gauge1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Meter for Liquid GasPressure GaugeGaugePressure Gauge
Kerui (Weifang) Automation Equipment Co., Ltd.
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Product DescriptionProduct DescriptionDwyer Differential Pressure GaugesDwyer Instruments, founded in 1931 by Fred Dwyer in Michigan City, Indiana, began with a simple mission: to provide high-quality, affordable instruments for measuring and controlling industrial processes. The company's early focus on precision Bourdon tube pressure gauges established a reputation for reliability that continues to this day. As industries evolved, so did Dwyer's product lines, expanding into areas like airflow measurement and low-differential pressure sensing.The Dwyer Series 2000 Differential Pressure Gauge is a mechanical instrument designed specifically for measuring very low pressure differences between two points. Its primary unit of measurement is inches of water column ("H2O or "w.c.), a unit perfectly suited for the subtle pressure variances found in air handling systems, filter monitoring, and laboratory environments. Unlike a standard pressure gauge that measures pressure relative to atmospheric pressure (gauge pressure) or absolute vacuum, a differential pressure (DP) gauge measures the difference between two applied pressures. This makes it an indispensable tool for monitoring system health, efficiency, and safety.The Series 2000's iconic design—a polycarbonate lens, a white ABS plastic case, a bold black-and-white dial, and two bottom-mounted pressure ports—has remained largely unchanged for decades, a testament to its flawless functionality and user acceptance.1. Historical Context and Product EvolutionThe development of the Series 2000 was driven by a growing industrial need in the mid-20th century. The post-war boom saw a rise in sophisticated HVAC systems for large commercial buildings, the advent of cleanrooms for aerospace and electronics manufacturing, and increased focus on industrial health and safety through proper ventilation. These applications required monitoring of parameters that were previously ignored:Filter Loading: Knowing when an air filter is clogged, indicated by a rise in the pressure drop across it.Containment Control: Ensuring a positive or negative pressure in a room relative to its surroundings to contain contaminants or protect a process.Airflow Verification: Confirming that fans and blowers are operating correctly to provide adequate airflow.Existing pressure gauges were too insensitive, too large, or too expensive for these tasks. Dwyer's innovation was to create a compact, highly sensitive, rugged, and cost-effective gauge based on a precision diaphragm movement rather than a Bourdon tube. This allowed it to accurately measure pressures as low as 0.1 inches of water column (approx. 25 Pascals).Over the years, the Series 2000 has seen incremental improvements in materials (e.g., upgraded diaphragm and seal compounds) and the expansion of its range to include various pressure scales, connection styles, and mounting options. However, its core mechanical principle remains untouched, proving that excellent engineering is timeless.A critical feature of this design is its "opposed pressure" capability. The diaphragm movement is equally responsive to a positive pressure on the HIGH port or a vacuum (negative pressure) on the LOW port. This makes the gauge perfect for measuring both positive and negative pressure differentials.The Overpressure Protector: A legendary feature of the Series 2000 is the red or black "push-to-lock" button on the front bezel. This is an integral overpressure protection device. When engaged (pushed in), it mechanically locks the diaphragm, preventing it from being overextended and permanently damaged. This is crucial during system startup, shutdown, or any event where a pressure spike might occur. The protector must be engaged before connecting tubing and disengaged only after pressures have stabilized.2. Detailed Technical Specifications and Design FeaturesThe success of the Series 2000 lies in the meticulous detail of its specifications, which are perfectly tailored to its intended use cases.Ranges: Available in over 20 ranges, from ultra-low (0-0.25" w.c.) to higher (0-200" w.c.). Common ranges include 0-0.5", 0-1", 0-2", 0-5", and 0-10" w.c. Many models also feature dual scales in "H2O and Pascals (Pa).Accuracy: Typically ±2% of full scale at mid-range when mounted vertically. Higher accuracy versions (e.g., ±1% FS) are available for critical applications.Pressure Connections: Standard ports are 1/8" NPT (National Pipe Taper) female, located at the bottom for the classic radial connection style. Axial (back-connected) versions are available for a cleaner panel appearance.Wetted Materials: The sensing diaphragm and pressure ports are constructed from 316 stainless steel, offering excellent corrosion resistance for air and most inert gases. Seals are standard Buna-N nitrile rubber; fluoroelastomer seals are available for higher temperatures or more aggressive environments.Case and Window: The housing is made of high-impact ABS plastic. The lens is made of clear, durable polycarbonate.Maximum Static Pressure: The diaphragm assembly can withstand line pressures up to 25 psig (1.7 bar). It is vital to understand that this is the static pressure in the lines, not the differential range. One can measure a 1" w.c. differential in a duct with a static pressure of 20 psig.Operating Temperature: -20° to 180°F (-29° to 82°C) for the media and environment.Mounting: The signature snap-in panel mount requires a 2-1/8" (54 mm) diameter hole. The gauge is secured using a supplied snap-ring. Surface mount brackets and pipe mount brackets are available as accessories.Weight: Approximately 0.5 lbs (0.23 kg), making it lightweight and easy to install.In an era of rapid digitalization and the Internet of Things (IoT), the continued dominance of the Dwyer Series 2000 Differential Pressure Gauge is a powerful statement. It proves that for countless applications, the most elegant solution is not the most complex one. It is the solution that is perfectly designed for its job: reliable, affordable, simple, and effective.SpecificationPressure Range0-5" HO to 0-600 psi (model dependent)Accuracy±2% of full scale (standard), ±1% availableRepeatability±0.5% of full scaleCase MaterialABS plastic (standard), Aluminum (optional)Wetted MaterialsBuna-N, EPDM ; Brass or 316SS fittingsConnection Size1/4" NPT (standard), 1/8" NPT availableOperating Temperature-20°F to +160°F (-29°C to +71°C)Storage Temperature-40°F to +180°F (-40°C to +82°C)Company 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.CertificationsPackaging & 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.
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