500°C High Temperature Accelerometers for Extreme Vibration Testing
High-temperature vibration testing is rarely a simple sensor selection problem. At 300°C, 400°C or 500°C, the sensor must survive heat, maintain stable charge output, fit into limited installation space, and still provide usable data under high vibration or shock conditions.
Dabey high-temperature accelerometers are designed for aerospace engine tests, gas turbine monitoring, exhaust system validation, power equipment vibration testing and other applications where standard IEPE sensors cannot be mounted directly in the hot zone.
Up to 500°C
for hot-zone vibration measurement
Charge Output
with remote signal conditioning
PCB Equivalent
model cross-reference available
Why Standard Accelerometers Are Not Enough at 500°C
Most standard IEPE accelerometers are limited by internal electronics, cable materials and long-term thermal stability. In high-temperature test areas, the sensor may face thermal drift, insulation degradation, unstable sensitivity, connector failure or signal noise caused by cable routing.
For this reason, 500°C vibration measurements usually require charge output accelerometers with high-temperature piezoelectric elements, metal or mineral-insulated cable options, and a charge amplifier located away from the hot zone.
- No built-in electronics exposed to the hot zone
- Charge output suitable for remote signal conditioning
- High-temperature cable and connector configuration
Stable sensitivity under thermal cycling - Compact housing for difficult mounting positions
Selection Snapshot
Typical Applications
High-temperature accelerometers are selected when the measurement point cannot be moved away from the heated structure. The final configuration depends on temperature, vibration level, fixture design and cable routing.
Aerospace
Aero Engine Vibration Testing
Used near high-temperature engine sections where vibration, thermal cycling and limited installation space occur at the same time.
Turbine
Gas Turbine Test Benches
Suitable for vibration measurement on turbine casings, hot structures and test rigs requiring charge output sensors.
Thermal Structure
Exhaust System Validation
Used for exhaust systems, high-temperature ducts, manifolds and structural parts exposed to continuous heat.
Industrial
Power Equipment Monitoring
Applied in high-temperature rotating equipment, thermal machinery and power system vibration tests.
Key Specifications to Confirm Before Selection
For high-temperature accelerometers, the model name alone is not enough. The final selection should be based on the actual mounting position, maximum surface temperature, expected vibration level, frequency range and cable routing conditions.
| Parameter | What to Check | Why It Matters |
|---|---|---|
| Temperature range | Continuous temperature and short-time peak temperature | Thermal margin affects sensor life, cable choice and calibration stability. |
| Sensitivity | Common options such as 5 pC/g, 10 pC/g or 50 pC/g | The signal level must match the expected vibration and charge amplifier input. |
| Measurement range | Expected g level and shock margin | Unexpected shock or resonance can overload the sensor during test. |
| Frequency response | Required useful bandwidth for the test | Mounting method and sensor mass both affect usable high-frequency data. |
| Mounting | Stud size, adhesive mounting or custom fixture | Repeatable mounting is important for repeatable frequency response. |
| Cable | High-temperature cable length and routing path | Cable noise, bend radius and insulation condition can affect the measurement chain. |
| Signal conditioning | Charge amplifier compatibility | The amplifier should be located away from the hot zone and matched to sensor output. |
| Replacement model | Existing PCB or other competitor part number | A datasheet review helps compare sensitivity, mounting, range and temperature limit. |
Recommended High-Temperature Accelerometer Models
These models are suitable starting points for 500°C vibration measurement. Final selection should be confirmed against the test condition and existing measurement chain.
- Sensitivity: 5pC/g
- Range: ±1000g
- Frequency Response (±5%): 10Hz to 4kHz
- Operating Temperature: -50°C to 500°C
- 10-32 Threaded Output Connector
- Sensitivity: 5pC/g
- Range: ±1000g
- Frequency Response (±5%): 10-4k Hz
- Operating Temperature: -50°C to 500°C
- 10-32 Threaded Output Connector
- Sensitivity: 50pC/g
- Measuring range: ±300g
- Frequency response (±5%) : 1Hz~3kHz
- Operating temperature: -50℃~500℃
- Withstand pressure 18MPa
- CNAS Certificate
PCB Equivalent Options for High-Temperature Testing
Many laboratories already have PCB accelerometers specified in old test procedures or equipment lists. When the original model has a long lead time, is difficult to source, or needs a modified cable or mounting configuration, Dabey can review the existing datasheet and recommend a compatible alternative.
We compare the key parameters rather than only matching the model name: sensitivity, temperature limit, frequency response, measurement range, mounting thread, cable type and charge amplifier requirements.
Useful information to send
- Current model number or datasheet
- Maximum surface temperature
- Expected vibration or shock range
- Required frequency range
- Mounting thread and available space
- Cable length and routing condition
- Charge amplifier or data acquisition system
Engineering Notes for 500°C Vibration Measurement
The accelerometer is only one part of a reliable high-temperature measurement chain. Cable routing, grounding, charge amplifier location and fixture design can all affect the final signal quality.
Before testing, it is important to confirm that the hot-zone cable length, connector protection and amplifier input settings are suitable for the actual environment.
Keep the charge amplifier away from the high-temperature zone.
Avoid sharp cable bends close to the sensor.
Confirm insulation resistance after thermal cycling.
Use proper mounting torque for repeatable frequency response.
Check sensitivity before and after high-temperature exposure when accuracy is critical.
Frequently Asked Questions
Most IEPE accelerometers cannot place internal electronics directly in a 500°C zone. For this temperature range, charge output accelerometers are usually preferred, with the charge amplifier installed away from the heat source.
Q2:Can Dabey replace PCB high-temperature accelerometers?
Yes. Dabey can review the PCB model number or datasheet and compare sensitivity, range, temperature limit, mounting and cable requirements to recommend a compatible model.
Q3:What information is needed for selection?
Please provide maximum temperature, expected vibration range, frequency range, mounting method, cable length, signal conditioning equipment and any existing sensor model.
Q4: Are custom cables or mounting threads available?
Yes. Cable length, connector type, mounting thread and some housing details can be adjusted depending on the model and application.
Q5:What applications commonly require 500°C accelerometers?
Aero engine tests, gas turbine tests, exhaust system validation, high-temperature structure tests and power equipment vibration measurement are common examples.
Need Help Selecting a High-Temperature Accelerometer?
If you are replacing an existing accelerometer, send the model number or datasheet. If this is a new test setup, send the mounting position, maximum temperature, expected vibration range, frequency range and cable length requirement. Dabey engineers will help narrow the selection before quoting.