CSI AC115-1D Triaxial Accelerometer

Technical Overview

The AC115-1D is a high-precision, triple-axis vibration transducer engineered by CSI (CTC) for comprehensive industrial condition monitoring. By simultaneously capturing acceleration data across the X, Y, and Z planes, this sensor provides a complete 3D profile of machine dynamics, allowing maintenance teams to detect complex faults—such as structural resonance, misalignment, and bearing degradation—that single-axis sensors might overlook.

Housed in a ruggedized 316L stainless steel enclosure, the AC115-1D is built to survive the most punishing industrial environments. With an IP68 protection rating, it is completely dust-tight and submersible, making it an ideal choice for cooling towers, paper mills, and wastewater treatment facilities where moisture and contaminants are constant.

Detailed Technical Specifications

• Measurement Axes: Simultaneous Triaxial (X, Y, Z) data acquisition.

• Sensitivity: 100 mV/g (±15% tolerance).

• Frequency Response: Broadband range from 1 Hz to 6500 Hz (±3dB).

• Dynamic Range: Rated for ±50 g peak acceleration.

• Spectral Noise Density:

• 27 μg/√Hz at 10 Hz

• 6.5 μg/√Hz at 100 Hz

• 2.5 μg/√Hz at 1000 Hz

• Electrical Characteristics:

• Excitation Voltage: 18–30 VDC.

• Constant Current: 2–10 mA.

• Bias Output: 10–14 VDC.

• Settling Time: Rapid stabilization in less than 2.5 seconds.

• Physical Construction:

• Chassis Material: Hermetically sealed 316L Stainless Steel.

• Mounting: Integrated 1/4-28 threaded mounting hole.

• Connection: 4-pin Mini-MIL style industrial connector.

• Environmental Integrity: IP68 Rated (Waterproof and Dustproof).

• Mass: Approximately 476g.

• Manufacturing Origin: USA.

Application and Field Reliability

The AC115-1D is the preferred vibration sensor for predictive maintenance (PdM) programs targeting critical rotating assets like turbines, large motors, and gearboxes. Its triaxial nature significantly reduces installation time and cabling complexity compared to three individual sensors. The high case isolation (>10⁸ ohm) prevents ground loops and electrical interference, ensuring the purity of the vibration signal even in areas with significant electromagnetic noise.