685A010 High Temperature Single Axis Accelerometers

685A010 High Temperature Single Axis Accelerometers (Nickel Alloy Charge Type)

The 685A010 series represents a premium tier of high temperature single axis accelerometers purpose-engineered to deliver precise dynamic vibration monitoring inside severely hostile thermal and chemical environments. Utilizing an unamplified, high-purity Piezoelectric (PE) charge crystal topology housed within a hermetically sealed enclosure, this transducer ensures robust, linear data collection across a sweeping temperature window from -50°C up to 500°C without risking depolarization. Engineered to survive critical industrial conditions, the 685A010 combines an advanced nickel base alloy chassis with a hardline Φ2 high-temperature integral connection piece, establishing an unyielding instrumentation standard for gas turbine validation, aerospace exhaust testing, and nuclear power structural analysis.

Key Features

• Extreme -50°C to 500°C PE Charge Architecture: Designed with premium unamplified piezoelectric crystals to guarantee stable 50 pC/g charge generation under extreme heat, safely operating in zones where conventional internal electronics fail.

• Corrosion-Resistant Nickel Base Alloy Housing: Encapsulated in a superalloy nickel base matrix that provides unmatched structural integrity, oxidation resistance, and long-term durability when exposed to aggressive hot gas streams and corrosive aerospace test fluids.

• Integrated Φ2 High-Temperature Connection Piece: Equipped with a specialized, low-mass Φ2 integrated cable breakout assembly that minimizes base strain, completely eliminates triboelectric line noise, and maintains hermetic electrical transmission during high-thermal cyclical loading.

• Robust Dynamic Envelope and Wide Linearity: Engineered with an ultra-stiff internal mass array yielding a resonant frequency ≥ 15 kHz, enabling excellent linear frequency response from 1 to 3,000 Hz (±5%) and 0.5 to 4,000 Hz (±10%) under continuous peak vibration limits up to 500 g pk.

 

Parameter	Specification / Value	Note / Condition
Brand & Model	Dabey Technology Model  685A010	High-temperature severe-environment series
Sensor Type	IEPE	Requires external charge amplifier or in-line charge converter
Sensitivity	50  pC/g	Room temperature calibration baseline ($\pm5\%$)
Measurement Range	±2500 g	Full-scale peak dynamic measurement window
Frequency Range (±5%)	1-3 k Hz	Flat frequency response bandwidth
Frequency Range (±10%)	0.5-4 k Hz	Extended linear operation zone
Resonant Frequency	≥ 15 kHz	Mounted natural resonant frequency
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 charge mode configuration for high-heat safety
Housing Material	Nickel base alloy	Premium superalloy for extreme oxidation and chemical resistance
Connector Type	Φ2 high-temperature integral piece	Integrated low-noise hardline thermal cable breakout assembly
Primary Applications	Gas Turbine R&D, Rocket Exhaust Analysis, Nuclear Reactor Structural Monitoring	Optimized for ultra-high temperature dynamic structural analysis