685A03 High Sensitivity Accelerometers

685A03 High Sensitivity Accelerometers (Extreme-Heat Charge Output)

The 685A03 series represents a premium class of high sensitivity accelerometers specifically engineered to capture low-level dynamic vibrations and structural transients within high-temperature, severe-service environments. Utilizing an unamplified piezoelectric charge output architecture encased inside a rugged, hermetically sealed shell, this single-axis transducer maintains structural integrity across a sweeping $-50^\circ\text{C}$ to $+500^\circ\text{C}$ thermal profile without risking crystal depolarization. Optimized for precision engineering applications, the 685A03 pairs an elevated 50 pC/g signal response with an integrated Φ3.2 high-temperature connection piece, delivering elite measurement reliability for gas turbine R&D, aerospace propulsion systems, and nuclear power plant diagnostics.

Key Features

• Elevated 50 pC/g Signal-to-Noise Resolution: Designed as high sensitivity accelerometers, these sensors provide powerful charge generation to capture micro-vibrations across low-amplitude testing spectrums, ensuring clean data acquisition prior to external amplification.

• Continuous Sub-Zero to 500°C Thermal Stability: Constructed with premium, ultra-stable piezoelectric crystals and zero internal electronics, preventing thermal drift or performance degradation during prolonged high-heat engine and exhaust operations.

• Integrated Φ3.2 High-Temperature Connection: Features a specialized Φ3.2 high-temperature integral piece connection, engineered to minimize cable mass loading, eliminate triboelectric noise, and guarantee secure electrical transmission under rigorous cyclical heating.

• Titanium / Stainless Steel Structural Armor: Housed within an ultra-tough, hermetically sealed metal casing capable of sustaining continuous linear vibration limits up to 500 g pk and sudden mechanical shocks up to 1000 g pk.