Explosion Proof Pressure Transmitter (4-20mA, ATEX Ex ia) | P20EX
Heavy-duty ATEX-certified explosion-proof pressure transmitter designed for continuous, high-reliability monitoring in hazardous gas and liquid environments. Built with a rugged 316L stainless steel diaphragm and an IP68 waterproof enclosure, the P20EX delivers long-term stability and EMI/EMC protection for heavy industrial automation, oil and gas, and petrochemical processes.
Key Features at a Glance:
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Hazardous Area Protection: Intrinsic safety rating Ex ia IIC T6 according to ATEX standards.
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Wide Pressure Range: Measures absolute and gauge pressures from -1 to 600 bar (or up to 9000 psi).
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Standard Industrial Outputs: Flexible 2-wire 4–20 mA loop power, or 0–5V / 0–10V 3-wire analog voltage options.
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Extreme Durability: Fully sealed IP68 design with superior vibration stability (up to 20g).
Description
Heavy-Duty Explosion Proof Pressure Transmitter for Hazardous Zones
Operating pressure instrumentation in hazardous locations demands zero compromise on safety and long-term stability. The P20EX Explosion Proof Pressure Transmitter is engineered specifically for demanding industrial applications where flammable gases, vapors, or liquids are present.
Certified to Ex ia IIC T6 ATEX standards, the P20EX combines an industrial silicon sensor core with a robust 316L stainless steel diaphragm. This configuration ensures accurate, real-time pressure acquisition across standard and harsh medium conditions—including oxygen service (with fluorocarbon oil filling) and petrochemical transport.
Optimized for Severe Industrial Conditions
Standard pressure sensors often suffer from signal drift or enclosure failure when exposed to electrical noise, pressure surges, or mechanical shock. The P20EX features built-in high-level EMC/EMI protection, digital compensation algorithms, and an impressive 300% F.S. burst pressure limit. Whether deployed in remote oil wells, automated hydraulic stations, or water conservancy pipelines, it delivers consistent signal integrity with minimal zero-point drift.
Applications
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Petrochemical & Oil/Gas: Hazardous fluid lines, wellhead real-time pressure management, and gas pipeline detection.
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Industrial Automation: Hydraulic pressure controllers, automated detection systems, and heavy machinery control.
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Specialized Utilities: Oxygen service lines (fluorocarbon oil filling options) and water conservancy projects.
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Laboratory & Testing: High-accuracy monitoring equipment and industrial test benches.
Features
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ATEX Ex ia IIC T6 Certification: Standard intrinsic safety compliance for reliable operation in Zone 0, Zone 1, and Zone 2 hazardous areas.
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Broad Range Availability: Covers vacuum to high-pressure ranges from -1 bar up to 600 bar (-14.5 to 9000 psi) with customized ranges available.
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IP68 Submersible Enclosure: Heavy-duty 304 or 316 stainless steel body with potted cable gland outlet ensures complete protection against water submersion and dust ingress.
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High Vibration & Shock Resistance: Mechanical vibration stability up to 20g ensures consistent readings near heavy pumps, compressors, and hydraulic drives.
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Digital Calibration & Thermal Compensation: Built-in temperature compensation (-10°C to +60°C) keeps thermal zero drift down to <= 0.02% FS/°C for high measurement repeatability.
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Fluid Media Customization: Standard silicon oil filling, plus specialized fluorocarbon oil options for pure oxygen safety or low-temperature environments (down to -55°C).
Specification
| Parametro Tecnico | Valore / Specifica |
| Model | P20EX Series |
| Explosion Proof Rating | Ex ia IIC T6 (ATEX 100a compliant) |
| Pressure Ranges | -1…0…1 bar up to 0…600 bar (-14.5 to 9000 psi) |
| Pressure Type | Gauge Pressure, Absolute Pressure |
| Accuracy | Standard: <= +-0.5% F.S. (Customizable: <= +-0.25% F.S.) |
| Output Signals | 4–20 mA (2-wire standard), 1–5V, 0–5V, 0–10V (3-wire) |
| Power Supply | 12–30 VDC (10–30 VDC or 12–36 VDC optional) |
| Safe Overload / Burst | Overload: 150% F.S. / Burst Pressure: 300% F.S. |
| Operating Temperature | -30°C to +85°C (Extended option: -40°C to +120°C) |
| Diaphragm Material | 316L Stainless Steel |
| Housing Material | 304 Stainless Steel (Standard) / 316 Stainless Steel |
| Ingress Protection | IP68 (Waterproof cable connection) |
| Process Connections | G1/4″ Male, G1/2″ Male, 1/4″ NPT Male, 1/2″ NPT Male/Female |
FAQ
D1: What explosion-proof protection does the P20EX offer?
R: The P20EX is certified Ex ia IIC T6 intrinsically safe according to ATEX standards. It is designed to limit electrical and thermal energy within the circuit so that it cannot ignite explosive gas atmospheres in hazardous industrial environments.
D2: Can the P20EX be used in submersed or outdoor washdown applications?
R: Yes. The P20EX comes with an IP68 waterproof rating and a 1/2″ NPT male thread cable outlet with integrated wiring, making it fully sealed against dust, rain, and water immersion.
D3: How does the P20EX differ from the PF series intrinsically safe pressure sensor?
R:
Choose P20EX if you require a classic industrial pressure transmitter with a wide span starting from negative/vacuum pressure up to 600 bar, IP68 submersibility, or standard 4–20mA / 0–10V analog wiring.
Choose PF Series if you need an ultra-compact, non-oil sputtered film sensor specifically engineered for extreme high-pressure ranges (up to 250 MPa / 2500 bar) and high-frequency vibration setups.
D4: Is the P20EX suitable for oxygen measurement or aggressive chemical media?
R: Standard P20EX models use silicon oil filling with a 316L SS diaphragm. For oxygen service, we offer specialized Fluorocarbon oil filling to prevent chemical reaction risks. We also offer custom options for xylene and corrosive media resistance.
D5: What pressure connections are available for the P20EX?
R: Standard male threads include G1/4″, G1/2″, 1/4″ NPT, and 1/2″ NPT. Female NPT connections and custom threads can also be provided upon request.
