Key Features of the AC118 Accelerometer
- 50 mV/g (±10 %) sensitivity – ideal for medium-to-high vibration levels
- Broad frequency response: 1 Hz–10 kHz (±3 dB) ensures fidelity from slow-speed gearboxes to high-speed spindles
- ±100 g peak dynamic range for “high-g” applications without clipping
- -58 °F to +250 °F (-50 °C – +121 °C) operating temperature
- 5,000 g peak shock survivability and welded, hermetic IP68 seal; submersible to 200 ft (60 m)
- SIL-2 safety rating for use in safety-instrumented systems
- Low noise floor (2.5 µg/√Hz @ 100 Hz) for clear spectral data
- Standard 2-pin MIL-C-5015 side-exit connector or integral-cable options
- Captive ¼-28 mounting stud supplied; compatible with most industrial mounts
Typical Applications for the AC118 Accelerometer
- High-speed rotating machinery (compressors, turbines, machine-tool spindles)
- General-purpose route-based vibration data collection on motors, pumps, fans, blowers
- Condition monitoring in wet or wash-down environments (food & beverage, paper mills) thanks to IP68 seal
- Marine, offshore, and submerged pump monitoring (submersible to 60 m)
- Safety-critical installations that require SIL-rated sensors (e.g., refineries, petro-chem plants)
- Portable magnet-mount surveys where occasional high-g transients are expected
Technical Specification AC118
| Parameter | Value |
|---|---|
| Sensitivity (25 °C) | 50 mV/g ±10 % |
| Dynamic range | ±100 g pk (when Vsource ≥ 22 V) |
| Frequency response (±3 dB) | 60–600 000 CPM (1 – 10 000 Hz) |
| Frequency response (±10 %) | 240–360 000 CPM (4 – 6 000 Hz) |
| Resonant frequency | 21 kHz nominal |
| Operating temperature | –58 °F to +250 °F (–50 °C to +121 °C) |
| Shock limit | 5 000 g pk |
| Noise density | 8 µg/√Hz @ 10 Hz; 2.5 µg/√Hz @ 100 Hz; 1.7 µg/√Hz @ 1 kHz |
| Power (IEPE) | 18–30 V DC, 2–10 mA constant current |
| Bias output | 10–14 V DC |
| Case isolation | > 1 × 108 Ω |
| Weight | 5.1 oz (145 g) |
| Housing / sealing | 316 L SS, welded hermetic, IP68 |
| Submersible depth | 200 ft (60 m) |
| Safety integrity | SIL 2 certified |
| Mounting | ¼-28 captive bolt (2–5 ft-lb torque) |
| Connector | 2-pin MIL-C-5015 (non-integral versions) |