• Accuracy: < 0.1% F.S. • Excitation Voltage: 5 - 15 V DC • Full-Scale Deflection: < 0.3 mm • Selectable Range: 0.1 - 20 kN • Technology: Silicon Piezoresistive • Housing: Stainless Steel
- 304 stainless steel monolithic housing - Amplitude-frequency response up to 10,000 Hz - 10,000g shock resistance on any axis - Selectable measurement range: ±50g to ±500g - MEMS variable capacitance technology - Lightweight: 15g
Accuracy: ±0.02% span over the temperature range Response Time: 300 milliseconds or less Long-term Stability: ±100 ppm FS/year Measurement Range: 0-20 MPa (selectable) Sensing Technology: Silicon resonant sensor Overpressure Tolerance: 1.5 times the full-scale pressure
JSPR91 High-Frequency Dynamic Pressure Measurement
Product Overview
The JSPR91 Pencil-Type Free-Field Blast Pressure Sensor is a top-notch high-frequency dynamic pressure sensor extensively designed for blast mechanics tests and shock wave measurement. It adopts advanced MEMS piezoresistive technology, thus combining the high-frequency characteristics of piezoelectric sensors with DC-response capability, and this makes it perfect for explosion blast wave measurement and ballistic pressure testing.
Technical Advantages
● From DC to High Frequency Response: As it is based on piezoresistive sensing technology, the sensor is capable of providing accurate measurements starting from static pressure all the way to high-frequency dynamic pressure events
● Sub-microsecond Response: The rise time <1μs guarantees very accurate capturing of shock wave pressure transient waveforms
● Optimized Structural Design: The smooth non-reflective外形and the locally flush-mounted structure are the main reasons for minimizing the flow field disturbance
● Improved Environmental Capability: For a double-shielded cable, the anti-optical interference design and the IP67 protection rating are proof that the sensor is geared for tough testing environments
● High-Temperature Resistance: It is able to withstand extremely high thermal shocks up to 2000°C/20ms under special circumstances
Core Applications
● Explosion blast wave measurement and free-field pressure monitoring
● Weapons development and ballistic pressure testing
● Blast mechanics experiments and safety assessment
● Aerospace propulsion system monitoring
● Industrial safety and protection equipment verification
Professional Services
Our sensor solutions are tailor-made to offer you adjustable specifications and form factors that meet your specific testing needs. Our technical team will be there for you all along the way from sensor selection to the interpretation of the data.
Performance Specifications
The key performance specifications of JSPR91 Pencil-Type Free-Field Blast Pressure Sensorare listed as below.
Unless otherwise specified, all testing was conducted under the following conditions: 12 VDC, 25°C, 50% R.H., and 1 standard atmosphere.
| NO. | Technical Parameter | Specification |
| 1 | Range | 0kPa --- 200kPa --- 1MPa --- 60MPa |
| 2 | Overpressure | ≤1.5 x Full Scale or 110MPa (whichever is lower) |
| 3 | Pressure Type | Gauge Pressure |
| 4 | Accuracy | ±0.1%FS, ±0.25%FS, ±0.5%FS |
| 5 | Measuring Medium | Gas |
| 6 | Long-Term Stability | ≤±0.2%FS/Year (max.) |
| 7 | Zero Temperature Error | ≤±0.03%FS/°C (≤100kPa); |
| 8 | ≤±0.02%FS/°C (>100kPa) | |
| 9 | Full Scale Temperature Error | ≤±0.03%FS/°C (≤100kPa); |
| 10 | ≤±0.02%FS/°C (>100kPa) | |
| 11 | Compensated Temperature | -10°C ~ +60°C |
| 12 | Operating Temperature | -40°C ~ +80°C |
| 13 | Rise Time | <10 μs |
| 14 | Sensor Natural Frequency | 200kHz ~ 700kHz, |
| 15 | 500kHz ~ 1MHz, | |
| 16 | 1MHz ~ 2MHz | |
| 17 | Transmitter Bandwidth | 0 ~ 3kHz, 0 ~ 20kHz, 0 ~ 200kHz |
| 18 | Resolution | 1/100,000 (default) |
| 19 | Power Supply | +9VDC ~ +36VDC (Other options available, see selection guide) |
| 20 | Output Signal | 0.5V to 4.5V (Other options available, see selection guide) |
| 21 | Protection Rating | IP65, IP67, IP68 |
| 22 | Electrical Connection | Hirschmann Connector, Aviation Connector, Integral Cable |
| 23 | Housing Material | Stainless Steel 1Cr18Ni9Ti |
FAQ
1. Q: What does the "free-field" blast sensor mean, and why is the pencil shape essential?
A: It checks for the presence of shockwaves that have no interaction with other surfaces other than the shockwave itself. The sensor with the pencil shape is a well-known type where reflections are minimized by the smooth surface, so that the sensor can give the truth of the incident wave without the influence of reflected ones.
2. Q: What is the reason that the sensor is working from DC to high frequency, while piezoelectric sensors don't?
A: Since the sensor is a piezoresistive type, it is able to detect static pressure changes (0 Hz) and yet have microsecond-level rise times (<10μs). In other words, it can register the gradual pressure decay as well as the very fast shock front, which piezoelectric sensors are not capable of doing.
3. Q: For what kind of applications is the 2000°C/20ms high-temperature capability required?
A: This is a crucial issue in the work of very close-proximity blast measurement and in the study of explosive fireballs when the sensor faces very extreme thermal transients, and yet, pressure data must be accurate.
4. Q: What is the reason that I should select a particular bandwidth option for blast measurement from several options (3kHz-200kHz)?
A: Usually, a 200kHz bandwidth is sufficient for a blast application engineer to fully capture the sharp shock front or wave head (approximately 1-50 microseconds), which results in peak overpressure measurement with great accuracy.
Moreover, the signals of such amplitude have relatively high electromag nitic immunity, making them much less susceptible to the electromagnetic interference of the blast environment than low-level signals, and therefore, clean data can be guaranteed even in electrically noisy conditions.
5. Q: What is the reason that the integrated amplifier is essential for blast testing?
A: The built-in amplifier is needless to say that the sensor it is capable of supporting high-level 0-5V/0-10V output signal gets a guarantee from the side of the sensor sensor.
