Triaxial Accelerometers KS813B – KS823B
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Overview

The KS813B and KS823B triaxial seismic accelerometers are highly sensitive sensors designed for precise vibration signal acquisition. Ideal for the construction industry, these sensors employ PZT-Ceramic piezoelectric technology with internal components based on the “Shear” methodology.

Featuring high sensitivity, the KS813B and KS823B models comply with DIN 4150-3 and are available exclusively in the IEPE version. They come with a wide range of accessories for mounting on a plate or tripod, ideal for applications in areas with difficult support surfaces, allowing for precise and reliable monitoring of structural vibrations.

Triaxial Seismic Accelerometers KS813B & KS823B

The triaxial seismic accelerometers KS813B and KS823B are high-sensitivity sensors for acquiring vibration signals.
They belong to the piezoelectric (PZT–Ceramic) sensor category.
They utilize the piezoelectric effect through an internal component designed according to the shear principle.
Their high sensitivity makes them ideal for structural and civil engineering applications, compliant with DIN 4150-3 standards.

Both models are available only in the IEPE version.
A wide range of accessories is available for plate or tripod mounting, suitable for applications in areas with uneven surfaces.

FEATURES

  • IEPE output

  • KS823B: high sensitivity, low-frequency limit, and very low noise level – ideal for building monitoring (DIN 4150) and wind turbines

  • KS813B: robust housing resistant to harsh environmental conditions

  • Water-resistant (IP67)

  • KS813B: includes an insulating base

  • KS813B: central fixing hole

  • KS823B: supplied with adapter (629) for plate mounting and easy axis alignment

TECHNICAL SPECIFICATIONS

Specification KS813B KS823B
Output IEPE IEPE
Piezo design Shear Shear
Voltage Sensitivity 100 ±5% mV/g 500 ±5% mV/g
Range ±55 g ±12 g
Destruction limit 4000 g 2000 g
Linear Frequency Range (Z axis) 0.2–10000 Hz 0.07–4000 Hz
Resonant Frequency (Z axis) >15 kHz (+25 dB) >9 kHz (+25 dB)
Transverse Sensitivity <5% <5%
Residual Noise (RMS, 0.5–20 Hz) <300 µg <26 µg
Noise Density @ 0.1 Hz 10 µg/√Hz 3 µg/√Hz
Noise Density @ 1 Hz 4 µg/√Hz 1 µg/√Hz
Noise Density @ 10 Hz 3 µg/√Hz 0.3 µg/√Hz
Noise Density @ 100 Hz 2 µg/√Hz 0.2 µg/√Hz
Constant Current Supply <250 µA <250 µA
Output Bias Voltage 12–13.5 V 12–13.5 V
Output Impedance <100 Ω <100 Ω
Operating Temperature Range -20 / +90 °C -30 / +90 °C
Temperature Coefficient of Sensitivity +0.08 %/K -0.05 %/K
Temperature Transient Sensitivity 0.001 ms²/K 0.001 ms²/K
Protection Grade IP67 IP67
Weight (without cable) 115 g / 4 oz 365 g / 12.8 oz
Case Material Stainless steel Stainless steel
Socket Binder 718 (M8x1) Binder 718 (M8x1)
Mounting Hole Ø4.1 mm (M4 screw supplied) M8

TYPICAL AMPLITUDE RESPONSE (Z AXIS)

Graphs show the frequency response curve (Bua(f)) for both KS813B and KS823B, confirming a flat and stable response across the operational range with a controlled rise at higher frequencies.

MOUNTING ON FLOORS

Photo 1 – Plate mounting system with dowels and screws.
Photo 2 – Threaded ring mounting system for KS823B, allowing X/Y axis orientation and 360° rotation.

WALL OR CEILING MOUNTING SYSTEM

Photo 3 – Flange 729 with tripod system, adaptable for various surface conditions (e.g., concrete, rock, plaster).

ACCESSORIES KS813B / KS823B

Connection Accessories

Code Description
087 IEPE cable 5 m
088 IEPE cable with adapter 034
034 Adapter 711 with 3xBNC output

Mounting Accessories

Code Description
408 Magnetic base M4 (KS813B)
508 Magnetic base M8 (KS823B)
529 Fixing plate with ring nut and dowel/screw set
629 Fixing plate (same as 529) with alignment flange
729 Mounting disc with tripod system

KIT INCLUDES

Model Contents
KS823B/01 Accessory kit includes cable 088/W (5 m), adapter 034 (3xBNC), magnetic base 508, plate 360°, adapter 629 with ring nut, dowel-screw sets, magnetic screw M8 (043), instruction manual, and data sheet.
KS813B Complete sensor with data sheet
300