Ref: SD300 / QD332

Digital triaxial accelerometers – SD300 / QD332

Triaxial measurement X / Y / Z
MEMS or Quartz MEMS technologies
Measuring ranges ±2 g or ±4 g
Sampling up to 1,000 samples/s
24-bit digital resolution
Ethernet RJ45 / PoE communication
NTP time synchronization
Power consumption: ≤ 1 W
IP67 protection
Configuration via web interface
- Temperature: -20 to +70 °C

Delivered within 5 to 6 weeks

Overview

The SHAKE SD300 and QD332 are digital triaxial accelerometers designed for dynamic monitoring of structures and infrastructure.

The SD300 uses a MEMS sensor and provides a versatile solution for vibration monitoring and Structural Health Monitoring.

The QD332 uses Quartz MEMS technology, particularly suitable when low vibration levels, better dynamic range and reduced self-noise are required.

Both models communicate directly via Ethernet PoE, allowing power supply and data transmission to be handled simultaneously with a single network cable.

Available models

Model	Technology	Axes	Range	Dynamic range	Self-noise
SD300	MEMS	3 axes	±2 / ±4 g	100 dB	22.5 µg/√Hz
QD332	Quartz MEMS	3 axes	±2 / ±4 g	132 dB	0.5 µg/√Hz

Acquisition

Both models can be configured with different sampling frequencies:

100 samples/s
200 samples/s
500 samples/s
1,000 samples/s

The digital resolution is 24 bits on all three axes.

Applications

These accelerometers are particularly suitable for:

structural monitoring of buildings
monitoring of bridges and civil engineering structures
monitoring of cable-stayed bridges
structural vibration analysis
diagnosis after a dynamic or seismic event
tracking of structural aging and stiffness
permanent multi-point monitoring

Which model to choose?

SD300

The SD300 is suitable for common structural and vibration monitoring applications requiring reliable digital triaxial measurement and simple network integration.

QD332

The QD332 is recommended for applications requiring better dynamic range and very low self-noise, particularly for micro-vibrations, sensitive structures and low-amplitude measurements.

FAQ

What is the difference between the SD300 and the QD332?
The SD300 uses a MEMS sensor, while the QD332 uses Quartz MEMS technology offering higher dynamic range and lower self-noise.
Do both models measure on 3 axes?
Yes. The SD300 and QD332 perform simultaneous measurement on the X, Y and Z axes.
What sampling frequency can be used?
Both models can operate at 100, 200, 500 or 1,000 samples/s.
How are they powered and connected?
They use an Ethernet PoE connection, which allows data transmission and sensor power supply with a single cable.

Define your configuration

The choice between the SD300 and the QD332 mainly depends on the vibration level to be measured, the required self-noise, the necessary dynamic range and the acquisition architecture.

PM Instrumentation can define a complete solution including the accelerometers, acquisition, PoE network and supervision and analysis tools.

Send us your application and the frequencies to be monitored to define the appropriate configuration.

Number of Axis: 3 Axis
Technologie: MEMS capacitive, Quartz
Type de produit: Accelerometer
Measuring range [g]: 2 / 4 G
Bandwidth (+/-5%): 150 , 395 , 100 Hz
Signal otuput: Ethernet
Tension d'alimentation: 12 V DC ± 10 %
Alimentation: PoE
Operating temperature range: -20 to 70 °C
Cable: Ethernet / PoE
Connecteur: RJ-45
Protection Class: IP67
Housing: Steel
Poids: 2
: 0-5 g
Application: geotechnical, Vibration
Remarque: SD300: 100 dB dynamic range, self-noise 22.5 µg/√Hz, shock resistance 5000 g (0.1 ms) – QD332: 132 dB dynamic range, self-noise 0.5 µg/√Hz, shock resistance 1000 g (0.2 ms)

SHAKE-SD300-DM.pdf

Dimensions

Model	Dimensions	Weight
SD300	137 × 75 × 55 mm	550 g
QD332	137 × 75 × 55 mm	660 g

Options

choice of MEMS or Quartz MEMS model
measuring range ±2 g or ±4 g
sampling frequency up to 1,000 SPS
multi-sensor acquisition
PX01 or CUBE unit
integration into a permanent monitoring system
analysis and recording via SanDAS software

Accessories

Depending on the project architecture, the solution can be completed with:

PX01 acquisition unit
CUBE unit / gateway
industrial Ethernet cables
PoE switch or injector
mounting system suited to the support
network protection enclosure
PC or server for data processing