HE Series — Dynamic Pressure Sensors
HE90 Medium Frequency Pulsating Pressure Sensor
Engineered for dynamic and pulsating pressure measurement with capacitive thin-film technology on titanium alloy diaphragm. 500 kHz natural frequency, 0–1 kHz response bandwidth, and durability exceeding 100 million cycles — ideal for high-speed testing, hydraulic pulse analysis, and engine pressure dynamics.
Range: 10 kPa–60 MPa
Accuracy: ±0.5% FS
Response: 0–1 kHz
CE Certified
Product Overview
The HE90 Medium Frequency Pulsating Pressure Sensor is purpose-built for capturing dynamic and pulsating pressure events in industrial testing environments. Utilizing advanced capacitive thin-film sensing technology deposited on a titanium alloy diaphragm with a gold-plated ceramic electrode, this sensor delivers an exceptionally high natural frequency of 500 kHz — enabling accurate measurement of rapid pressure transients that conventional sensors miss entirely.
With a working response bandwidth of 0–1 kHz (expandable to 1.5 kHz), the HE90 captures both static baseline pressure and dynamic fluctuations simultaneously. The variable capacitor design provides inherent overload protection and exceptional long-term stability, while the titanium alloy construction ensures chemical compatibility with aggressive media including hydraulic oils, fuels, and industrial gases.
Rated for over 100 million pressure cycles — ten times the durability of standard industrial pressure sensors — the HE90 is the preferred choice for continuous high-speed testing applications such as oil pump pulse analysis, engine combustion chamber monitoring, hydraulic fatigue testing, and locomotive brake system validation. Available in gauge and absolute reference types with pressure ranges from 10 kPa to 60 MPa, the sensor accommodates virtually any dynamic pressure measurement requirement in R&D and production testing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Pressure Range | 10 kPa – 60 MPa |
| Reference Type | Gauge / Absolute |
| Sensing Technology | Capacitive thin-film on titanium alloy diaphragm |
| Accuracy | ±0.5% FS (typical) |
| Long-Term Stability | ≤0.2% FS/year |
| Natural Frequency | 500 kHz |
| Response Frequency | 0–1 kHz (max 1.5 kHz) |
| Overload Capacity | 2× rated pressure |
| Cycle Durability | >10⁸ cycles (100 million) |
| Output Signals | 4-20 mA, 1-5 V, 0-5 V, 0.5-4.5 V |
| Supply Voltage | 12–36 VDC (current) / 12–36 VDC (voltage) |
| Media Temperature | -20°C to +85°C |
| Ambient Temperature | -20°C to +85°C |
| Storage Temperature | -40°C to +125°C |
| Pressure Port Material | Titanium alloy / Stainless steel 316L |
| Housing Material | Stainless steel |
| Process Connection | M20×1.5, G1/4, 1/4 NPT (custom available) |
| Electrical Connection | Cable (1 m default), Hirschmann DIN 43650A, M12×1 right-angle, M12×1 straight |
| Protection Rating | IP65 / IP67 |
| Certifications | CE |
Key Features
500 kHz Natural Frequency
Capacitive thin-film technology on titanium alloy delivers an exceptionally high natural frequency, enabling accurate capture of fast pressure transients up to 1.5 kHz response bandwidth.
100 Million Cycle Durability
Rated for over 10⁸ pressure cycles — ten times the lifespan of standard industrial sensors — ensuring reliable performance in continuous high-speed fatigue testing applications.
Static + Dynamic Measurement
Simultaneously captures both static baseline pressure and dynamic fluctuations, providing complete pressure profile data in a single sensor for comprehensive testing analysis.
Titanium Alloy Construction
Pressure-sensing diaphragm made from corrosion-resistant titanium alloy with gold-plated ceramic electrode, ensuring chemical compatibility with hydraulic oils, fuels, and aggressive industrial media.
Wide Range Coverage
Available in pressure ranges from 10 kPa to 60 MPa in both gauge and absolute reference types, covering applications from low-pressure pneumatic testing to high-pressure hydraulic systems.
Flexible Output Options
Multiple output configurations including 4-20 mA, 1-5 V, 0-5 V, and 0.5-4.5 V signals, with Hirschmann, M12, and cable electrical connections for seamless system integration.
Applications
Hydraulic Pulse & Fatigue Testing
Monitor pressure pulsations in hydraulic systems during endurance testing, capturing cycle-by-cycle pressure profiles for component lifetime analysis and quality validation.
Engine & Combustion Analysis
Measure dynamic pressure variations in engine cylinders, fuel injection systems, and exhaust manifolds to optimize combustion efficiency and validate engine performance parameters.
Oil Pump Performance Testing
Capture high-speed pressure pulsations in oil pump test benches, analyzing flow ripple, pressure surge characteristics, and pump efficiency under varying speed and load conditions.
Pneumatic Valve & Actuator Testing
Measure rapid pressure changes during pneumatic valve switching and actuator cycling to verify response times, detect leaks, and ensure reliable automation system performance.
Locomotive & Railway Test Stands
Validate brake system pressure dynamics, compressor output pulsations, and pneumatic circuit responses on locomotive test stands for safety-critical railway system qualification.
R&D Pressure Dynamics Research
Support laboratory research in fluid dynamics, pressure wave propagation, water hammer analysis, and materials testing where high-frequency pressure data acquisition is essential.
Ordering Guide
Use the model code structure below to specify your HE90 configuration. For custom requirements or assistance, contact our engineering team.
Model Code: HE90 – [Reference] – [Range] – [Output] – [Process Connection] – [Electrical Connection] – [Options]
| Position | Code | Description |
|---|---|---|
| Reference Type | G | Gauge pressure |
| A | Absolute pressure | |
| Pressure Range | 10kPa…60MPa | Specify full-scale range (e.g., 1MPa, 10MPa, 60MPa) |
| Output Signal | E | 4-20 mA (2-wire) |
| V1 | 0-5 V (3-wire) | |
| V2 | 1-5 V (3-wire) | |
| V3 | 0.5-4.5 V (3-wire) | |
| Process Connection | M1 | M20×1.5 external thread |
| G1 | G1/4 external thread | |
| N1 | 1/4 NPT external thread | |
| XX | Custom (specify) | |
| Electrical Connection | C1 | Cable outlet (1 m default) |
| H1 | Hirschmann DIN 43650A | |
| M12R | M12×1 right-angle connector | |
| M12S | M12×1 straight connector | |
| Options | T | Custom cable length (specify) |
Example: HE90-G-10MPa-E-M1-H1 = Gauge type, 10 MPa range, 4-20 mA output, M20×1.5 thread, Hirschmann connector
Related Products
Frequently Asked Questions
The HE90 is specifically designed for dynamic and pulsating pressure measurement, unlike standard pressure transmitters that measure quasi-static pressure changes. Its capacitive thin-film technology on a titanium alloy diaphragm provides a 500 kHz natural frequency and 0–1 kHz response bandwidth, enabling accurate capture of rapid pressure transients. Standard transmitters typically have response times measured in milliseconds (10–100 ms), while the HE90 captures events at microsecond resolution.
Yes. The HE90’s variable capacitor design captures both the DC (static) baseline pressure and the AC (dynamic) fluctuations superimposed on it. The output signal contains the complete pressure profile — you can extract both the mean pressure level and the pulsation amplitude, frequency, and waveform from a single measurement channel.
The HE90 provides a flat response bandwidth of 0–1 kHz for standard operation, meaning it accurately measures pressure oscillations up to 1,000 cycles per second without amplitude attenuation. The sensor can operate up to 1.5 kHz maximum, though with some amplitude roll-off above 1 kHz. The underlying natural frequency of 500 kHz provides excellent margin above the working bandwidth.
The HE90 is rated for over 100 million (10⁸) pressure cycles, which is approximately ten times the durability of standard industrial pressure sensors. At a test frequency of 1 kHz, this translates to roughly 28 hours of continuous pulsating pressure operation before reaching the rated cycle count. For most industrial testing applications running at lower frequencies, the sensor provides months or years of reliable service without degradation.
The HE90 features a titanium alloy diaphragm and stainless steel pressure port, providing excellent compatibility with a wide range of media including hydraulic oils, engine fuels, compressed gases, water, glycol-based coolants, and most non-corrosive industrial fluids. For highly corrosive or specialized media, contact our engineering team to verify material compatibility for your specific application.
Need a High-Frequency Dynamic Pressure Solution?
Our engineering team specializes in configuring the HE90 for demanding dynamic pressure testing applications. Whether you need custom pressure ranges, specific output signals, or technical guidance on integration into your test bench, we’re here to help.
Our engineers typically respond within 12 business hours with detailed technical specifications and pricing.