DR3721 High-Performance Digital Differential Pressure Gauge
DR3721 Digital Differential Pressure Gauge
The DR3721 Digital Differential Pressure Gauge integrates a high-stability piezoresistive differential pressure core with a dedicated, premium transmitter conditioning circuit. Housed in a fully sealed, robust stainless steel enclosure, it delivers high static pressure resistance (up to 20MPa) with externally adjustable zero and full-scale calibration. Engineered with superior electromagnetic shielding and comprehensive surge safeguards, this instrument guarantees uncompromising accuracy and extreme stability across volatile industrial processes.
Applications
- Oil, Gas, Petrochemical: Ideal for complex oil, gas, and refining facilities.
- Power & Utilities: Suitable for power plants, steam boilers, and heavy utilities infrastructure.
- Water Management: Perfect for municipal water supply management and deep hydrological exploration.
- Industrial Machinery: Seamless integration into high-pressure hydraulic stations and industrial OEM machinery.
Features
- High Static Pressure Rating: Supports up to 20 MPa with built-in short-circuit & reverse polarity protection.
- Industrial-Grade Surge Mitigation: Integrated professional 3-level lightning and industrial surge safeguards.
- Premium EMC Architecture: Certified to EN61000-6-2 and EN61000-6-4 standards for volatile environments.
- Hazardous Area Compliance: Fully certified and complies with GB3836.1-2010 and GB3836.4-2010 standards.
- Robust Metallurgy: Features an isolating diaphragm and process port made of premium 316L Stainless Steel.
Technical Specs
| Parameter | Specification Details |
| Pressure Measurement Range | 0 ~ 10 kPa … 3.5 MPa |
| Maximum Static Operating Pressure | 20 MPa |
| Linearity & Accuracy | ±0.25% FS / ±0.5% FS |
| Long-Term Signal Stability | ±0.2% FS / Year |
| Static Pressure Influence Error | 0.05% FS per 100 kPa |
| Temperature Drift (Zero/Full-Scale) | ≤ 100 kPa: 0.03% FS/°C | > 100 kPa: 0.02% FS/°C |
| Fluid Media Compatibility | Gases & liquids non-corrosive to 316L SS and Fluororubber (Viton) |
| Temperature Profiles | Compensated: 0°C to +50°C | Operating & Storage: -30°C to +70°C |
| Wetted Materials | Isolating Diaphragm: 316L SS | Process Port: 316L SS |
| Enclosure Housing & Protection | 304 Stainless Steel (Standard, IP65 Rating) |
Ordering Guide
| Model Code Element | Option Code | Technical Parameter Details | Material Configuration |
| Base Instrument Model | DR3721 | Digital Differential Pressure Gauge | Stainless Steel Structure |
| Pressure Range Selector | -[0 ~ X] Unit | X: Custom calibration span (10kPa to 3.5MPa) | Specify KPa or MPa unit |
| Accuracy & Output Level | 0.2 0.5 | ±0.2% Full Scale (Premium Linearity) ±0.5% Full Scale (Standard) | – |
| Mechanical Metallurgy | M1 M2 | Diaphragm & Port: 316L SS Diaphragm & Port: 316L SS | Housing Shell: 304 SS Housing Shell: 316L SS |
| Process Connection Thread | C1 C2 C3 C4 C5 C6 C7 | NPT 1/4″ Male NPT 1/4″ Female (Standard Thread) NPT 1/2″ Male NPT 1/2″ Female M20 * 1.5 Male (Metric Standard) M20 * 1.5 Female (Metric Standard) Customized Thread Request | Tapered Connection Tapered Connection Tapered Connection Tapered Connection Parallel Connection Parallel Connection Engineering Confirmation Required |
Outline Construction (Unit: mm)
Standard Nomenclature Code Example: > DR3721 – [0~100]kPa – 0.5 – M1 – C2
(Configured Parameters: DR3721 gauge base, 0 to 100 kPa range, ±0.5% FS accuracy, M1 metallurgy structure, fitted with an NPT 1/4″ Female process connection thread.)
FAQ
What is the maximum static pressure that the DR3721 can withstand?
The DR3721 is engineered for demanding industrial environments and can deliver high static pressure resistance up to 20MPa , ensuring extreme stability and accuracy across volatile processes.
Can the DR3721 be used with corrosive fluids?
The standard wetted parts (isolating diaphragm and process port) are constructed from premium 316L Stainless Steel with Fluororubber (Viton) seals. It is fully compatible with gases and liquids that are non-corrosive to these materials.
Does this gauge comply with international standards for hazardous areas and EMC?
Yes. The DR3721 is fully certified for Hazardous Areas (complying with GB3836.1-2010 and GB3836.4-2010) and features a premium EMC architecture certified to EN61000-6-2 and EN61000-6-4 standards.