Intrinsically Safe Pressure Sensor (Up to 2500 Bar) | PF Series
Compact, high-precision intrinsically safe pressure sensor engineered for extreme pressure ranges up to 250 MPa (2500 bar) in hazardous, high-vibration environments. Built with advanced sputtered thin-film technology and an all-welded 17-4PH stainless steel structure, the PF Series features an oil-free design that eliminates thermal instability and fluid leaks in tight-space installations.
Key Features at a Glance:
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Hazardous Zone Certification: Intrinsically safe protection rating Ex ia IIC T6 Ga.
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Extreme Pressure Capability: Wide measuring ranges from 0.5 MPa up to 250 MPa (2500 bar).
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Oil-Free Sputtered Film Core: Eliminates oil leaks, thermal drift, and fill-fluid degradation.
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High Vibration & Shock Resistance: Rugged, compact 17-4PH wetted structure designed for heavy fatigue and tight spaces.
Description
High-Pressure, Oil-Free Intrinsically Safe Pressure Sensor
Measuring high pressures in hazardous, space-constrained environments requires exceptional structural durability and signal stability. The PF Series Intrinsically Safe Pressure Transmitter utilizes a sputtered thin-film sensing element packaged directly onto a metal substrate. Unlike traditional oil-filled pressure sensors, its all-welded, non-oil structure eliminates thermal instability, internal creep, and risk of oil contamination.
Certified to Ex ia IIC T6 Ga for explosive gas environments, the PF Series is specifically designed for severe mechanical setups. With random vibration resistance up to 20g and shock tolerance up to 50g, it maintains precise, long-term stability ($\ge \pm 0.2\% \text{ F.S./year}$) across extreme pressure ranges up to 250 MPa.
Built for Tight Spaces & High-Fatigue Applications
The ultra-compact profile of the PF Series makes it ideal for dense manifold blocks, mobile hydraulic rigs, and hazardous OEM machinery where standard explosion-proof housings are too bulky. Its wetted parts, constructed from high-strength 17-4PH stainless steel without internal adhesives or glues, deliver over 10 million pressure cycles of fatigue life.
Primary Applications
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Oil & Gas Exploration: Oil drilling rigs, high-pressure well testing, and refining pipelines.
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High-Pressure Hydraulics: Extreme-pressure hydraulic power units, waterjet equipment, and industrial presses.
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Hazardous Infrastructure: Gas networks, coal mining equipment, and flammable liquid transport.
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Marine & Shipbuilding: Engine room fuel lines and offshore hydraulic control systems.
Features
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Ex ia IIC T6 Ga Safety Rating: Fully certified intrinsically safe protection for Zone 0, Zone 1, and Zone 2 hazardous locations.
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Sputtered Thin-Film Reliability: Solid-state metal strain gauge technology without oil filling, ensuring zero thermal drift or leakage.
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Extreme Pressure Handling: Covers pressure ranges from 0.5 MPa (5 bar) to 250 MPa (2500 bar) with high overload safety margins.
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Rugged 17-4PH Stainless Construction: Adhesiveless, all-welded wetted parts deliver outstanding resistance to mechanical stress and media erosion.
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Wide Operating Temperature Span: Factory-calibrated accuracy guaranteed across temperatures from -40°C to +105°C.
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Compact Footprint: Easily fits into tight mounting locations with options for M12 circular connectors or direct cable outlets (IP65/IP67).
Specification
| Technical Parameter | Specification / Value |
| Model | PF Series (PF100) |
| Explosion-Proof Grade | Ex ia IIC T6 Ga (Intrinsically Safe) |
| Pressure Ranges | 0.5 MPa (5 bar) up to 250 MPa (2500 bar) |
| Accuracy | Standard: +-0.5% F.S. / High Accuracy: +-0.2% F.S. |
| Long-Term Stability | <= +-0.2% F.S. / year |
| Sensing Core / Fill | Sputtered thin-film (100% Oil-Free) |
| Wetted Material | 17-4PH Stainless Steel (All-welded, glue-free) |
| Output Signal | 4–20 mA (2-wire loop powered) |
| Power Supply | 8–32 VDC (Nominal 24 VDC) |
| Operating / Ambient Temp. | -40°C to +105°C |
| Durability / Cycles | > 10,000,000 pressure cycles |
| Vibration / Shock Resistance | Vibration: 20g (GB/T2423.56) / Shock: 50g (11ms) |
| Ingress Protection | IP65 / IP67 |
| Electrical Connections | M12x1 4-Pin Connector / Direct Cable Outlet |
| Process Connections | G1/4″, G1/2″, NPT 1/4″, M20x1.5, M14x1.5, M12x1.5 |
FAQ
Q1: What is the main advantage of the PF Series sputtered film design over standard pressure sensors?
A: The PF Series uses a sputtered film sensing element welded directly onto a metal diaphragm with no internal oil filling. This eliminates thermal instability, oil leakage risks, and diaphragm drift under high mechanical vibration or pressure cycling.
Q2: How does the PF Series differ from the P20EX explosion-proof sensor?
A:
Choose the PF Series if you need ultra-high pressure measurement (up to 2500 bar), a non-oil design for high vibration/fatigue, or a compact footprint for tight spaces.
Choose the P20EX if you require vacuum/negative pressure ranges (-1 bar up to 600 bar), IP68 full submersion capabilities, or standard 0–10V / 0–5V analog voltage outputs.
Q3: Is an intrinsic safety barrier required for installation?
A: Yes. Because the PF Series is rated Ex ia IIC T6 Ga, it must be wired through an approved intrinsic safety barrier (or isolator) located in the safe area to limit electrical energy entering the hazardous zone.
Q4: Can the PF Series handle high pressure spikes and mechanical shock?
A: Yes. With shock resistance tested to 50g (11 ms) and continuous vibration stability up to 20g, the PF Series is specifically built for heavy-duty pumps, hydraulic hammers, and high-frequency valve cycling.
Q5: What output and power options are supported?
A: The standard output is an industrial 2-wire 4–20 mA loop powered signal operating on a wide 8–32 VDC supply.
