HM91 Micro Pressure Sensor & Transducer
Ultra-miniature piezoresistive pressure sensor with 2.54 mm minimum diameter, 0.1% FS accuracy, and up to 1.6 MHz intrinsic frequency — engineered for aerodynamics research, wind tunnel testing, and high-frequency dynamic measurement.
Product Overview
The HM91 Micro Pressure Sensor and Transducer is specifically designed for applications where precise pressure measurement must be achieved without disturbing the original flow field. Built with German silicon-based piezoresistive technology and modern micro encapsulation, the HM91 achieves an extraordinarily small footprint — as small as 2.54 mm diameter and 3.77 mm length — while delivering outstanding dynamic and static performance.
With an intrinsic frequency range of 20 KHz to 1.6 MHz, the HM91 excels in high-frequency dynamic pressure measurement. The sensor covers a wide measurement range from -100 KPa to 60 MPa in both gauge and absolute pressure configurations. Its 316 stainless steel wetted parts ensure excellent chemical compatibility, making it suitable for a diverse array of media including corrosive gases and liquids.
Technical Specifications
Key Features
Ultra-Miniature Design
Minimum sensor diameter of just 2.54 mm and length of 3.77 mm — one of the smallest piezoresistive pressure sensors available for non-intrusive flow field measurement.
High-Frequency Response
Intrinsic frequency from 20 KHz up to 1.6 MHz enables capture of rapid transient pressure events, explosive shock waves, and high-speed aerodynamic phenomena.
Exceptional Accuracy
Overall accuracy up to ±0.1% FS with excellent long-term stability of ±0.1% FS/year typical, ensuring reliable data in demanding research environments.
Wide Temperature Range
Operates from -40°C to 85°C standard, extendable to 120°C or even 175°C for special high-temperature applications in engine and turbine testing.
Broad Measurement Range
Covers -100 KPa to 60 MPa in gauge or absolute pressure modes — a single platform for vacuum through ultra-high pressure dynamic measurements.
Rugged Construction
316 stainless steel wetted parts withstand corrosive media. Vibration rated to 100 g across 10–2000 Hz for the harshest test environments.
Applications
Aerodynamics & Wind Tunnel
Surface pressure mapping on aircraft models, wing profiles, and vehicle bodies in subsonic, transonic, and supersonic wind tunnels.
Aircraft & Engine Testing
In-flight pressure monitoring on turbine blades, compressor stages, and nacelle surfaces during developmental and certification test programs.
Hydraulic & Hydromechanics
Dynamic pressure profiling in hydraulic systems, turbine runner passages, and submersible equipment performance validation.
Blast & Shock Wave Analysis
Measuring overpressure from chemical or nuclear explosive events with microsecond rise-time capture for defense and safety research.
Biomedical Research
Minimally invasive intravascular or intracranial pressure monitoring where ultra-small sensor dimensions are critical to avoid tissue disturbance.
Model & Scale Testing
Pressure distribution measurement on scaled-down prototypes for automotive, marine, and civil engineering structural analysis.
Ordering Guide
Example: HM91 (0~500KPa) — H1 — 1 — V2 — F1 — W1 = Micro pressure sensor, 0–500 KPa gauge, 0–3 KHz bandwidth, ±0.4% FS accuracy, 0–5 V DC output, M8 thread, ø3.5 shielded cable.
Note: Choose bandwidth tier (H1/H2/H3) based on your measurement frequency requirements for the most economical selection. The code E (additional) provides intrinsically safe explosion-proof Ex ia II CT5, requiring a safety barrier power supply. Contact us for special requirements.
Frequently Asked Questions
Related Products
HM80
High-temperature pressure transmitter rated up to 150°C / 200°C, diffused silicon sensor, ±0.25% FS accuracy, multiple outputs for harsh thermal environments.
HM10
Compact OEM pressure sensor with mV output, ±0.1% FS accuracy, 3.3–15 V excitation, miniature stainless steel construction for space-constrained applications.
HM60
ATEX/IECEx certified explosion-proof pressure transmitter, dual housing design, 4-20mA/HART, ±0.1% FS accuracy for hazardous area installations.
Need a Micro Pressure Sensing Solution?
Whether you need a miniature sensor for confined-space testing or a high-frequency transducer for aerospace applications, our engineering team can help you select the right HM91 configuration for your micro pressure measurement needs.
Our engineers typically respond within 12 business hours with detailed technical specifications and pricing.