Comprehensive Product Introduction: Dwyer Series 2000 Magnehelic® Differential Pressure Gauges
1. Overview
The Dwyer Series 2000 Magnehelic® Differential Pressure Gauges are precision instruments designed to measure low differential pressures of air and non-corrosive gases. With over 475 models and 27 configurable options, these gauges utilize a frictionless magnetic movement mechanism for rapid response to positive, negative (vacuum), or differential pressure changes. Renowned for durability and accuracy, they are widely used in HVAC, industrial monitoring, cleanrooms, and medical equipment .
2. Key Features & Design Innovations
2.1. Precision Measurement Mechanism
Frictionless Magnetic Movement: A helical spring and samarium-cobalt magnet convert diaphragm displacement into pointer rotation, enabling ±2% full-scale accuracy (varies by range). This eliminates mechanical wear and ensures longevity .
Overpressure Protection: Silicone relief plugs vent at ~25 psig (1.72 kPa), preventing damage during pressure surges. Optional Medium Pressure (35 psig) and High Pressure (80 psig) variants are available .
2.2. Robust Construction
Housing: Die-cast aluminum with dark gray enamel finish, IP67-rated for dust/water resistance. Salt-spray tested for 168 hours .
Diaphragm: Molded silicone with integrated O-ring seals, secured between front/back plates to limit displacement during overpressure .
Viewing Window: Shatter-resistant acrylic lens prevents distortion and allows clear visibility from wide angles .
2.3. User-Centric Design
Adjustable Zero Point: External screw enables calibration without disassembling the cover .
Dual Connection Ports: Two pairs of 1/8" NPT ports (side/back) for flexible tubing or pipe installations .
Mounting Options: Surface or flush-panel installation using included brackets .
2.4. Safety Enhancements
Rubber Pointer Stop: Prevents mechanism damage during overrange conditions .
Jeweled Bearings: Shock-resistant pivots with silicone fluid damping ensure vibration tolerance .
Parameter |
Specification |
Ranges |
81 options: 0-60 Pa to 0-30 kPa; ±30 Pa to ±3.75 kPa |
Accuracy |
±2% FS (standard); ±3% for -100 Pa/-125 Pa; ±4% for -60 Pa ranges |
Pressure Limits |
-20" Hg to 15 psig (-0.677 to 1.034 bar); MP/HP options up to 80 psig |
Temperature Range |
-7°C to 60°C (20°F to 140°F); low-temperature variants available |
Dimensions |
101.6 mm (4") dial diameter; 120.65 × 55.56 mm housing |
Weight |
510 g (standard); 963 g (MP/HP models) |
Media Compatibility |
Air, non-flammable gases (hydrogen compatible with Buna-N diaphragm option) |
Table 1: Key technical specifications of Series 2000 gauges.
4. Applications
4.1. HVAC & Filtration
Filter Monitoring: Detects clogging in HVAC filters by measuring pressure drop .
Duct/Static Pressure: Measures airflow resistance in ducts and building pressurization .
Cleanroom Validation: Ensures positive pressure maintenance in ISO-certified spaces .
4.2. Industrial Processes
Fan/Vacuum Systems: Monitors blower inlet vacuum or discharge pressure .
Flow Measurement: With Pitot tubes, calculates air velocity (e.g., 2000-00AV model: 300-2,000 ft/min) .
Bubble Tube Level Sensing: Tracks liquid levels via differential pressure .
4.3. Medical & Laboratory
Respiratory Devices: Monitors patient airway pressure .
Gas Blending Systems: Controls air/gas mixing ratios in analytical equipment .
5. Model Variants & Accessories
Standard Models: Include 2000-60PA (0-60 Pa), 2000-1KPA (0-1 kPa), 2000-30KPA (0-30 kPa) .
Center-Zero Models: E.g., 2300-250PA (±125 Pa) for bidirectional pressure monitoring .
Velocity Scales: Combined pressure/velocity ranges (e.g., 2000-0AV: 0-0.5" w.c. / 500-2,800 ft/min) .
Accessories:
1/8" NPT plugs and rubber tube fittings.
Flush-mounting kits (replaced by snap rings for MP/HP units).
6. Advantages Over Competing Technologies
Liquid-Free Operation: Avoids evaporation, freezing, or leveling issues common in manometers .
Rapid Response: Magnetic mechanism detects changes in <2 seconds .
Long-Term Reliability: No lubricants or wear-prone linkages reduce maintenance needs .
7. Ordering Guidance
Hydrogen Service: Specify Buna-N diaphragm and limit pressure to 35 psig .
Non-Standard Conditions: Consult factory for extreme temperatures or corrosive media
Certifications: CE, UL, CSA, FM (for hazardous locations with Ex options).
8. Conclusion
The Dwyer Series 2000 Magnehelic® Gauges set industry standards for low-differential-pressure measurement through unmatched durability, precision, and versatility. Their frictionless magnetic movement, robust IP67 housing, and extensive model range make them ideal for critical applications from HVAC tuning to medical device monitoring. For detailed specifications or custom configurations, consult Dwyer's technical documentation or authorized distributors.

KeRui (weifang) Automation Equipment Co., Ltd. specializes in industrial automation instrument development, production and sales, technical services, and supportingequipment supply of specialized companies.
The main products are flow meters, level meters, temperature meters, pressure meters, electrical meters, thermal intelligent meters, programmable controllers (PLC), DCS distributed control systems,and eight series of more than 1,000 specifications.
Its products and technologies are widely used in electric power, metallurgy, petrochemicals, environmental textile, dyeing, and other fields.protection, plastics, food, printing, tobacco,textile, dyeing, and other fields.


1.Enhanced Efficiency and Productivity through optimized workflow automation and minimized manual intervention.
2.High Precision and Accuracy achieved via advanced sensors, calibration technologies, and error-correction algorithms.
3.Reduced Human Error by eliminating subjective decision-making in repetitive or complex operational tasks.
4.24/7 Operational Capability with self-diagnostic systems and predictive maintenance protocols ensuring uninterrupted performance.
5.Real-Time Monitoring and Data Acquisition through IoT-enabled sensors and centralized control interfaces for instant analytics.
6.Improved Safety in Hazardous Environments by deploying explosion-proof designs and remote operation features in extreme conditions.
7.Cost Savings on Labor and Maintenance through automated calibration routines and reduced workforce dependency.
8.Scalability and Adaptability to Various Processes via modular designs and programmable logic controller (PLC) compatibility.
9.Remote Control and Automation Integration with industry-standard protocols (e.g., HART, Profibus) and SCADA system interoperability.
10.Long-Term Reliability and Consistent Performance ensured by ruggedized components and automated performance benchmarking systems.



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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 you.
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A: Do not worry about the package, we have rich experience in packing, and all our package is wooden case package.
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Q: Do you provide samples?
A: Yes, we have materials in stock to help you to get the samples as soon as we can.
Q: What is the MOQ?
A:1PC.
Q: Can I get a lower price if I order large quantities?
A: Yes, cheaper prices with more bigger size orders.