Sputtered Thin-Film Heavy Duty Hydraulic Pressure Sensor | PF310
Heavy-duty, high-precision hydraulic pressure sensor engineered for extreme operating conditions in construction machinery, heavy equipment, and high-pressure hydraulic systems. Built with advanced sputtered thin-film technology directly on a 17-4PH stainless steel substrate, the PF310 Series features an all-welded, 100% oil-free construction that eliminates thermal drift, internal leaks, and diaphragm creep.
Equipped with an integrated pulse buffer, it delivers exceptional resistance to severe cavitation, liquid hammer, and heavy mechanical vibration.
Key Features at a Glance:
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Oil-Free Sputtered Thin-Film Core: Zero oil filling prevents thermal instability and fluid leakage.
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Extreme Mechanical Durability: Built to withstand 20g random vibration, 50g shock, and over 100 million pressure cycles.
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Cavitation & Water Hammer Protection: Integrated pulse damping protects against high peak pressure spikes.
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Wide Pressure Range: Accurate measurement from 1 MPa to 100 MPa (10 bar to 1000 bar).
Description
Heavy-Duty Hydraulic Pressure Sensor for Construction & Mobile Machinery
Monitoring hydraulic pressure in heavy equipment requires instrumentation capable of withstanding continuous pressure surges, intense mechanical vibration, and wide temperature swings. The PF310 Series Heavy Duty Hydraulic Pressure Sensor is purpose-built to solve the most demanding challenges in mobile hydraulics and construction machinery.
Unlike conventional piezoresistive sensors that rely on internal silicone oil filling, the PF310 utilizes sputtered thin-film strain gauges bonded directly onto a 17-4PH stainless steel measuring cell. This all-welded, oil-free design completely eliminates seal degradation, oil leakage, and thermal zero shift under extreme temperature variations.
Engineered for Cavitation, Shock, and Liquid Hammer Resistance
Hydraulic circuits in excavators, pump trucks, and heavy presses frequently suffer from rapid valve shut-offs, liquid hammer phenomena, and severe pressure peaks. The PF310 features an integrated internal pulse buffer designed to absorb sudden pressure spikes (with overload protection up to 300% and burst pressure limits up to 1000%). Combined with advanced EMC anti-surge circuit protection, the PF310 maintains reliable signal output ($\le \pm 0.1\% \text{ F.S./year}$ long-term stability) in the harshest industrial environments.
Primary Applications
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Construction & Earthmoving Machinery: Excavators, rotary drilling rigs, cranes, loaders, and road headers.
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Concrete & Pumping Equipment: Trailer pumps, vehicle pumps, and concrete pump trucks.
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Heavy Mobile Hydraulics: Piling machinery, shield machines, agricultural equipment, and forestry machinery.
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Industrial Hydraulic Systems: High-pressure hydraulic power units, industrial presses, and hydraulic test benches.
Features
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Sputtered Thin-Film Technology: Strain resistance directly sputtered onto a 17-4PH S/S substrate ensures maximum measurement accuracy and long-term stability better than +-0.1% F.S./year.
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100% Oil-Free & All-Welded Construction: Eliminates fluid contamination risks, seal deterioration, and thermal instability.
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Integrated Water Hammer Buffer: Built-in pulse damping protects the internal sensor core from severe hydraulic shock waves and cavitation.
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High Vibration & Impact Tolerance: Rated for 20g random vibration (GB/T2423.56) and 50g mechanical shock (11ms), guaranteeing reliable performance near heavy pumps and diesel engines.
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Wide Operating Temperature Range: High-precision measurement calibrated across medium and ambient temperatures from -40°C to +105°C.
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Flexible Electrical & Process Connections: Compatible with Deutsch DT04-18P/3P, Packard, M12x1, Hirschmann, and AMP connectors for direct plug-and-play machine integration.
Specification
| Technical Parameter | Specification / Value |
| Model | PF310 Series |
| Measuring Ranges |
1 MPa to 100 MPa (10 bar to 1000 bar / 145 to 14,500 psi) |
| Accuracy Class |
+-0.25% F.S., +-0.5% F.S., +-1% F.S. (across -40°C to +105°C) |
| Sensing Element |
Sputtered thin-film on 17-4PH stainless steel (100% Oil-Free) |
| Overload Pressure |
200% to 300% F.S. |
| Burst Pressure |
Up to 1000% F.S. (<= 400 MPa) |
| Long-Term Stability |
<= +-0.1% F.S. / year |
| Response Time |
Fast response < 1 ms |
| Output Signals |
4–20 mA, 0.5–4.5V ratiometric, 0.5–4.5V, 0–10V |
| Power Supply |
8–32 VDC |
| Service Life / Durability |
> 100,000,000 pressure cycles ($10^8$ cycles) |
| Vibration Resistance |
Random: 20g (GB/T2423.56) / Sinusoidal: 14.1g (GB/T2423.10) |
| Shock Resistance |
50g, 11 ms (GB/T2423.5) |
| Ingress Protection |
IP67 |
| Medium & Ambient Temp. |
-40°C to +105°C |
| Electrical Connectors |
M12x1, Packard, Hirschmann, AMP, Deutsch DT04-4P/3P, Sumitomo |
| Process Connections |
G1/4″, G1/2″, G1/8″, G3/8″, NPT 1/4″, M12x1.5, M14x1.5, M20x1.5 |
FAQ
Q1: Why is a sputtered thin-film sensor better for construction machinery hydraulics than standard oil-filled sensors?
A: Construction machinery hydraulics generate severe pressure surges, continuous engine vibration, and high heat. Standard oil-filled sensors can suffer from oil leakage, internal seal degradation, and thermal zero drift. The PF310 uses a 100% oil-free, all-welded 17-4PH stainless steel core that eliminates thermal drift and leakage risks entirely.
Q2: How does the PF310 handle hydraulic cavitation and water hammer spikes?
A: The PF310 features an integrated internal pulse buffer designed to absorb sudden high peak pressure surges, liquid hammer shocks, and cavitation phenomena common when hydraulic valves open and close rapidly.
Q3: How does the PF310 differ from the P20 Industrial Pressure Sensor?
A:
Choose PF310 for high-pressure hydraulic circuits (10 to 1000 bar), extreme vibration setups (20g), water hammer protection, and heavy mobile machinery applications.
Choose P20 for general industrial automation, process monitoring, vacuum/negative pressure (-1 to 600 bar), and standard liquid or gas tank level/line setups.
Q4: What connector options are available for mobile OEM installation?
A: The PF310 supports a wide range of mobile hydraulic electrical interfaces, including Deutsch DT04-4P/3P, Packard, AMP, M12x1, Hirschmann, Sumitomo, and direct cable outlets.
Q5: What is the expected service life of the PF310 in heavy-duty applications?
A: Thanks to its double gold wire lead technology and robust mechanical design, the PF310 is rated for over 100 million pressure cycles with long-term stability better than +-0.1% F.S./year.
