685S04 Charge mode high temperature vibration sensor

685S04 Industrial High Temperature Vibration Sensor (PCB Equivalent)

The 685S04 is a highly precise, industrial-grade piezoelectric charge mode high temperature vibration sensor engineered for accurate continuous monitoring in severe thermal testing applications. Built with a nominal sensitivity of 50 pC/g, a dynamic measurement range of ±500 g, and an extended frequency response tracking up to 9,000 Hz, this sensor captures crucial dynamic stress data across demanding rotating machinery. Designed as a 1:1 direct drop-in replacement and equivalent for legacy PCB Western models, it integrates seamlessly into existing plant infrastructure while dramatically cutting procurement costs and global delivery wait times.

 

Why Choose the 685S04 Accelerometer?

✔️ Ultra-Low Temperature Drift: 0.020%/°C sensitivity stability ensures accuracy.
✔️ High Sensitivity: 50 pC/g output for precise vibration detection.
✔️ Robust Design: Laser-welded IP68 housing resists dust, moisture, and extreme heat.
✔️ Anti-Interference: Differential signal output minimizes noise in industrial environments.

 

 

Ideal for Demanding Industrial Applications

✅ Energy Sector: Vibration monitoring in high-temperature turbines.
✅ Aerospace: Engine testing under extreme thermal conditions.
✅ Manufacturing: Predictive maintenance for heavy machinery.

 

Technical Specifications

Parameter	Specification / Value	Note / Condition
Sensor Type	Piezoelectric Charge Output	Requires external differential charge amplifier
Core Target Keyword	High temperature vibration sensor	Optimized for industrial machinery and turbines
Sensitivity	50 pC/g	Baseline room temperature calibration
Measurement Range	±500 g	Peak dynamic acceleration range
Frequency Range (±5%)	1 to 6,000 Hz	Flat frequency response bandwidth
Frequency Range (±1dB)	1 to 9,000 Hz	Extended structural measurement range
Resonant Frequency	≥28 kHz	Mounted natural resonant frequency
Operating Temperature	-50°C to 260°C	High-temperature operational limit
Housing Material	Titanium / Stainless Steel	Hermetically sealed, corrosion-resistant alloy
Connector Type	7/16 – 27 Dual-core	Threaded differential low-noise connection
Cross Reference	PCB Piezotronics Replacement	Functional, structural, and physical 1:1 equivalent