HM SERIES — High-Frequency Dynamic
HM90 High-Frequency Dynamic Pressure Transmitter
German piezoresistive technology with up to 2 MHz intrinsic frequency, 1 μs rise time, and 0.1% FS accuracy — purpose-built for blast wave analysis, aerospace testing, and high-speed dynamic pressure measurement.
Product Overview
The HM90 High-Frequency Dynamic Pressure Transmitter is engineered for undistorted measurement of rapidly changing, steep-rise pressure waveforms encountered in military engineering, chemical explosion testing, petroleum well testing, and advanced research environments. Using German high-performance silicon chips with micro-machining technology, the HM90 achieves intrinsic frequencies up to 2 MHz and rise times as fast as 1 μs.
The integrated piezoresistive sensing element delivers superior elastic mechanics characteristics compared to conventional dynamic pressure sensors. With three selectable bandwidth tiers (H1: 0–3 KHz, H2: 0–20 KHz, H3: 0–200 KHz) and optional high-temperature capability up to 2000°C transient, the HM90 covers the full spectrum of dynamic pressure measurement applications from -100 KPa to 100 MPa.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measuring Range | -100 KPa ~ 0 ~ 1 KPa … 20 KPa … 100 MPa |
| Overload Capacity | 2× FS pressure (1.1× for 100 MPa range) |
| Pressure Type | Gauge pressure or Absolute pressure |
| Compatible Media | Gas or liquid compatible with 316 stainless steel |
| Overall Accuracy | ±0.1% FS / ±0.25% FS / ±0.4% FS |
| Intrinsic Frequency | 150 KHz–700 KHz (H1) / 500 KHz–1 MHz (H2) / 1 MHz–2 MHz (H3) |
| Bandwidth | 0–3 KHz (H1) / 0–20 KHz (H2) / 0–200 KHz (H3) |
| Rise Time | 0.2 ms–75 μs (H1) / 12 μs (H2) / 1 μs (H3) |
| Long-Term Stability | Typical: ±0.1% FS/year; Max: ±0.02% FS/year |
| Operating Temperature | -40°C to 85°C (standard); -10°C to 250°C (special) |
| Zero Point Temp. Drift | Typical: ±0.02% FS/°C; Max: ±0.05% FS/°C |
| Sensitivity Temp. Drift | Typical: ±0.02% FS/°C; Max: ±0.05% FS/°C |
| Power Supply | 12–36 V DC (24 V DC standard) |
| Signal Output | 4–20 mA / 1–5 V DC / 0–5 V DC |
| Load Resistance | ≤ (U−12) / 0.02 Ω |
| Enclosure Protection | IP65 (plug type); IP67 (cable type) |
| Response Time | ≤ 3 ms |
| Vibration Tolerance | ≤ ±0.01% FS (X, Y, Z axes, 200 Hz/g) |
| Sensor Membrane | 316L stainless steel or monocrystalline silicon |
| O-Ring Material | Fluororubber |
| Explosion-Proof | Ex ia II CT5 (optional) |
| Insulation Resistance | 100 MΩ @ 500 V DC |
| Resolution | Theoretically infinite; practical 1/100,000 |
| High-Temp Option (T2) | Up to 250°C balancing / 2000°C transient |
Key Features
⚡ Ultra-High Intrinsic Frequency
Up to 2 MHz intrinsic frequency with 1 μs rise time (H3 tier), enabling faithful capture of the steepest pressure transients including explosive shock fronts.
🎯 Three Bandwidth Tiers
Selectable H1 (0–3 KHz), H2 (0–20 KHz), or H3 (0–200 KHz) bandwidth options — choose the optimal tier for your measurement frequency requirements and budget.
🔥 Extreme Temperature Capability
Optional T2 high-temperature configuration withstands 250°C continuous and 2000°C transient exposure — critical for blast testing and propulsion environments.
🛡️ All-Stainless-Steel Construction
1Cr18Ni9Ti enclosure with 316L sensor membrane and fluororubber O-rings for excellent corrosion resistance and media compatibility.
📏 Wide Measurement Range
-100 KPa t 100 MPa covering vacuum through ultra-high pressure, with 2× overload protection (1.1× at 100 MPa) for field safety.
💥 Explosion-Proof Option
Optional Ex ia II CT5 intrinsically safe certification with free-field blast configuration (T1) for defense and demolition research applications.
Applications
Chemical Explosion & Blast Testing
Overpressure waveform capture in controlled detonation facilities, mine clearance research, and structural blast vulnerability studies.
Aerospace & Engine Testing
Turbine blade pressure mapping, combustion chamber dynamics, and rocket motor test stand measurements requiring MHz-class frequency response.
Petroleum Well Testing
Downhole pressure transient analysis during well drilling, perforation events, and hydraulic fracturing operations in extreme environments.
Hydraulic Power Systems
Dynamic pressure profiling in hydraulic actuators, servo valves, and water hammer studies requiring fast rise-time capture.
Military & Defense Engineering
Ballistic overpressure measurement, munitions testing, and armor protection evaluation under high-speed impact loading.
Biomedical & Trauma Research
Impact pressure measurement in biomechanical studies, trauma simulation, and protective equipment performance evaluation.
Ordering Guide
Example: HM90 (0~500KPa) — H1 — 1 — V2 — F1 — W1 — E — T2 = Dynamic pressure transmitter, 0–500 KPa gauge, 0–3 KHz bandwidth, ±0.4% FS, 0–5 V DC output, M20×1.5 thread, cable IP67, explosion-proof, high-temperature.
| Selection Code | Options |
|---|---|
| Code: Pressure Type | G = Gauge (default), A = Absolute |
| Range | (0~X KPa or MPa) — specify desired full-scale range |
| Code: Bandwidth | H1 = 0–3 KHz, H2 = 0–20 KHz, H3 = 0–200 KHz |
| Code: Accuracy | 1 = ±0.4% FS, 2 = ±0.25% FS, 3 = ±0.15% FS |
| Code: Signal Output | A1 = 4–20 mA, V1 = 1–5 V DC, V2 = 0–5 V DC |
| Code: Connection | F1 = M20×1.5 thread, F2 = G1/4 thread, F0 = Special |
| Code: Cable/Connector | W1 = Cable type (IP67, 2 m), W2 = Socket type (IP65, DIN43650) |
| Code: Additional | P = Flush diaphragm, E = Ex ia II CT5, T1 = Free-field blast, T2 = High-temp (250°C/2000°C) |
Tip: Choose bandwidth tier (H1/H2/H3) based on your measurement frequency requirements for the most economical selection. Correctly adopt the sealing method to prevent installation stress from affecting flush-membrane product stability.
Frequently Asked Questions
Need a Dynamic Pressure Measurement Solution?
Whether you need a single sensor for blast wave analysis or a full suite for aerospace engine testing, our engineering team can help you select the right HM90 configuration and bandwidth tier for your dynamic measurement application.
Our engineers typically respond within 12 business hours with detailed technical specifications and pricing.