1. Althen Sensors
  2. Sensors
  3. Vibration sensors
  4. Low frequency (seismic) vibration sensors
  5. ASC QF-1211 Low-frequency seismic vibration sensor

ASC QF-1211 Low-frequency seismic vibration sensor

High-sensitivity capacitive accelerometer for seismic, structural health and vibration monitoring applications


Key features

  • Capacitive low-frequency seismic sensor
  • Measurement ranges: ±1 g, ±2 g, ±5 g, ±10 g
  • Bandwidth: 0 Hz (DC) to 200 Hz
  • Noise density: 7 µg/√Hz (typical)
  • Excellent bias and scale factor stability
  • Shock resistance up to 5,000 g
  • Rugged aluminium housing, IP67
  • Operating temperature: −40 °C to +85 °C
  • Custom cable lengths and connectors available

Performance

The ASC QF-1211 is a high-sensitivity, low-frequency seismic accelerometer based on capacitive MEMS technology. With a bandwidth from DC to 200 Hz and selectable measurement ranges from ±1 g to ±10 g, the sensor is designed for applications requiring precise low-frequency vibration and motion detection.

Thanks to its very low noise density of 7 µg/√Hz and excellent long-term bias stability, the QF-1211 is ideal for seismic monitoring, structural health monitoring, and low-frequency vibration analysis.

Usage conditions

The sensor is housed in a rugged anodized aluminium enclosure with IP67 protection, offering reliable performance in harsh environments. It operates between −40 °C and +85 °C, with shock resistance up to 5,000 g. Power supply ranges from 6 to 36 VDC, with low current consumption.

Applications

  • Seismic and earthquake monitoring
  • Structural health monitoring of bridges and buildings
  • Low-frequency vibration analysis in civil engineering
  • Condition monitoring of critical infrastructure

Advantages

The ASC QF-1211 provides high resolution, excellent stability and robust environmental protection, making it the perfect choice for engineers working in seismic monitoring, SHM, and low-frequency vibration measurement.

Do you need this sensor for your next project?

Request a no-obligation quote or send us your contact details for a free, no-obligation consultation. Our sales engineers will then contact you within a maximum of 1 to 2 working days.

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Not exactly what you are looking for? We offer standard sensors, but can also help you with sensors adapted for you or a fully customised measurement solution. Contact us for advice or pricing.

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Technical Specifications

Specification Value
Measurement ranges ±1 g, ±2 g, ±5 g, ±10 g
Bandwidth (−3 dB) 0 Hz … 200 Hz
Noise density 7 µg/√Hz (typical)
Bias stability Excellent long-term stability
Shock resistance 5,000 g
Supply voltage 6–36 VDC
Operating temperature −40 °C … +85 °C
Housing material Anodized aluminium
Protection class IP67
Weight ~100 g (without cable)

Related products

Need something else?

ASC EQ-x211 / EQ-x215 Low-frequency capacitive MEMS accelerometer

  • Sub-μg resolution MEMS sensor
  • Triaxial seismic accelerometer
  • Optional IP68 for harsh environments
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