685A01 Highly Accurate Accelerometers

685A01 Highly Accurate Accelerometers (High-Temperature Charge Output)

The 685A01 series represents a premium class of highly accurate accelerometers precision-engineered to deliver linear vibration and dynamic shock measurements under extreme thermal and mechanical constraints. Utilizing a specialized unamplified piezoelectric charge crystal geometry encapsulated in a hermetically sealed housing, this transducer maintains an outstanding operating temperature envelope from -50°C up to 500°C without risk of signal degradation or depolarization. Optimized for high-fidelity structural testing, the 685A01 features a high 50 pC/g sensitivity and a robust $\pm300\text{ g}$ dynamic range, making it the ideal solution for gas turbine diagnostics, aerospace propulsion monitoring, and high-temperature exhaust system research.

Product feature

1. Special high – temperature piezoelectric materials and high – temperature alloy casing. Withstands up to 500℃ and 18MPa pressure. Ensures stable operation in harsh conditions.”
2. Sensitivity of 50 pC/g. Low amplitude linearity (≤1%) and transverse sensitivity (≤3%) guarantee accurate acceleration measurements. Ideal for applications where precision matters.”
3. High – temperature alloy cable output. Resistant to high temperatures, ensuring stable signal transmission. Long – lasting and reliable.

 

Core Target Keyword	1-axis accelerometer sensor	Classification: Single-axis dynamic transducer
Sensor Type	Piezoelectric Charge Output	Requires external charge amplifier or inline signal conditioner
Sensitivity	50 pC/g	Rated nominal output; excellent signal-to-noise ratio
Measurement Range	±300 g	Full-scale dynamic measurement window
Frequency Range (±5%)	1-3k Hz	Reference baseline calibration range
Frequency Range (±10%)	0.5-4k Hz	Extended linearity frequency envelope
Resonant Frequency	≥ 15 kHz	High natural frequency prevents mounting resonance errors
Shock Limit	1000 g pk	Maximum survivable transient shock threshold
Maximum Vibration	500 g pk	Continuous sinusoidal mechanical vibration limit
Operating Temperature	-50°C to 500°C	Unamplified design supports extreme high-heat profiles
Housing Material	Titanium / Stainless Steel	Hermetically sealed, high strength-to-weight ratio alloy
Connector Type		Standard micro-coaxial connection for low-noise instrumentation
Primary Applications	Gas Turbine R&D, Aerospace Engine Testing, Industrial Exhaust Monitoring	Optimized for ultra-high temperature dynamic structural analysis