Seismic Accelerometers KB12 – KS48C
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Overview

Highly sensitive single-axis seismic accelerometers are instruments designed for the precise acquisition of low-frequency vibration signals, essential for the dynamic monitoring of buildings exposed to continuous vibration phenomena.

These sensors, based on piezoelectric (PZT – Ceramic) technology, offer high sensitivity, making them ideal for detailed vibration analysis. Available in an IEPE version, they are suitable for continuous and dynamic monitoring of buildings subject to structural motion and vibration, enabling precise assessment of the building’s stability and safety over time.

Seismic Accelerometers – Monaxial, High Sensitivity (Low Frequency)

Seismic single-axis accelerometers with high sensitivity for acquiring low-frequency vibration signals.
The sensors belong to the category of piezoelectric (PZT – Ceramic) sensors.

Their high sensitivity makes them suitable for analysis and dynamic monitoring of buildings particularly subject to continuous vibrational phenomena.
Both models are available in the IEPE version.

FEATURES

  • Ideal for seismic measurements and for building vibration monitoring, especially at low frequencies

  • The high sensitivity of the piezoelectric system allows excellent resolution and low noise

  • KB12VD: high sensitivity relative to internal mass

  • KB12VD supplied with an air damping system for resonance attenuation and protection against possible overloads due to coupling friction

  • KB12VD and KS48C: IEPE signal output

  • KS48C: protection rating IP67

FIELDS OF APPLICATION

  • Dynamic testing

  • Structural monitoring

  • Accelerometric measurements

  • Frequency measurements in structures

TECHNICAL SPECIFICATIONS

Specification KB12VD KS48C
Output IEPE IEPE
Piezo design Bender Shear
Voltage Sensitivity 10,000 ±10% mV/g 1,000 ±5% mV/g
Range ±0.6 g ±6 g
Destruction limit 200 g 1000 g
Linear Frequency Range (-3 dB) 0.08 – 260 Hz 0.1 – 4000 Hz
Linear Frequency Range (-10%) 0.16 – 160 Hz 0.2 – 2600 Hz
Linear Frequency Range (-5%) 0.25 – 130 Hz 0.3 – 2000 Hz
Resonant frequency >0.35 kHz (+15 dB) >7 kHz (+25 dB)
Operating temperature range -20 / +80 °C -20 / +120 °C
Weight (without cable) 150 g / 5.3 oz 165 g / 5.8 oz
Case material Aluminium Stainless steel
Cable connection Radial Axial
Socket UNF10-32 Binder 713
Mounting thread M5 / M10 M8

ACCESSORIES

Code Description
PRF1091DRC Cubic aluminium support
COM0089MET Magnetic base M8
COM0059MET Accelerometer cable KS48C straight, 5.00 m
COM0058MET Accelerometer cable KS48C angled, 5.00 m
COM0092MET Accelerometer cable KB12VD, 1.50 m

TYPICAL FREQUENCY RESPONSE AND ACOUSTIC EMISSIONS

Typical Frequency Response

  • KB12VD and KS48C show the percentage deviation of the output signal (Bua(f)) as a function of frequency (Hz).
    The graphs indicate a flat response across most of the frequency range, with a rise near the upper limit — typical of piezoelectric accelerometers.

Connection KS48C – Pin Assignment

Pin Description
1 Signal ground
2 Not used
3 Signal output
4 Not used

(View at sensor socket)

Acoustic Emissions

  • The noise graphs (in µg) display the self-noise level versus frequency (Hz).

  • Both KB12VD and KS48C exhibit extremely low noise, confirming their suitability for low-frequency vibration and seismic measurements.

Mounting and Insulating Flange for KB12VD (Standard Accessory)

  • Countersunk holes with PVC insulating washers for mounting.

  • M3 cylinder-head screws used to fix the accelerometer base.

  • Provides mechanical stability and electrical insulation from the mounting surface.

 

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