AC131-M12A Series High G and High Frequency Measurement Accelerometer

The CTC AC131-M12A Series is a high-performance accelerometer designed for applications requiring measurement of very high g-forces and high-frequency vibrations. With a sensitivity of 10 mV/g (±10%) and an impressive dynamic range of ±500 g, this sensor is capable of capturing extreme shock and vibration events with precision. Its frequency response spans from 1 Hz to 15 kHz (60 to 900,000 CPM), making it suitable for detailed analysis of high-frequency phenomena. The sensor’s rugged construction, including a hermetically welded 316L stainless steel housing, ensures durability in harsh industrial environments.

Equipped with a top-exit 4-pin M12 connector and a 1/4-28 blind tapped mounting hole, the AC131-M12A is easy to install and integrate into existing monitoring systems. The sensor features a shear-mode PZT ceramic sensing element, delivering low noise levels and excellent signal fidelity. It is SIL 2 rated for safety-critical applications and backed by CTC’s unconditional lifetime warranty, making it a reliable choice for demanding vibration monitoring tasks.

Key Features for the AC131-M12A

  1. Very high dynamic range of ±500 g for accurate measurement of extreme shock and vibration
  2. Sensitivity of 10 mV/g with ±10% tolerance for precise signal output
  3. Wide frequency response from 1 Hz to 15 kHz (60 to 900,000 CPM) for detailed vibration analysis
  4. Rugged hermetically sealed 316L stainless steel housing for harsh environments
  5. Low spectral noise: 300 µg/√Hz @ 10 Hz, 30 µg/√Hz @ 100 Hz, 6 µg/√Hz @ 1 kHz
  6. Top-exit 4-pin M12 connector and 1/4-28 blind tapped mounting for easy installation
  7. SIL 2 rated for safety-critical applications

Typical Applications for the AC131-M12A Accelerometer

The AC131-M12A accelerometer is ideal for applications that demand measurement of very high g-forces and high-frequency vibrations. Its robust design and wide dynamic range make it suitable for extreme shock testing, structural health monitoring, and safety-critical machinery.

  • High-g shock and impact testing in aerospace and automotive industries
  • High-frequency vibration monitoring in industrial machinery
  • Structural health monitoring of heavy equipment and infrastructure
  • Safety-critical applications requiring SIL 2 rated sensors
  • Research and development involving high-g dynamic events
  • OEM integration for rugged industrial vibration monitoring

Technical Specification AC131-M12A Overview

ParameterValueMetric / Notes
Sensitivity (±10%)10 mV/g—
Frequency Response (±3 dB)1 Hz – 15 kHz60 – 900,000 CPM
Frequency Response (±10%)2 Hz – 6 kHz120 – 360,000 CPM
Dynamic Range±500 g peak—
Shock Protection5,000 g peak—
Spectral Noise @ 10 Hz300 µg/√Hz—
Spectral Noise @ 100 Hz30 µg/√Hz—
Spectral Noise @ 1000 Hz6 µg/√Hz—
Settling Time<2 seconds—
Voltage Source (IEPE)18 – 30 V DC—
Constant Current Excitation2 – 10 mA—
Output Impedance<100 ohm—
Bias Output Voltage10 – 14 V DC—
Case Isolation>10⁸ ohm—
Temperature Range-58 to 250 °F-50 to 121 °C
Housing Material316L Stainless SteelHermetically welded
Weight3.2 oz90 grams
Mounting1/4-28 Blind TappedM8x1 or M8x1.25 Adapter Stud
Connector4 Pin M12Top exit

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