Hinweis: Dieses Produkt wurde durch das Modell 663A01 von IMI/PCB ersetzt.

Digiducer™ + Smartphone = The New Vibration Meter

Der Digiducer Modell 333D01 ist ein USB Digital Beschleunigungssensor der die Messung von Vibrationen vereinfacht.

Das Modell 333D01 ist der erste voll integrierte und kompakte Piezoelektrische Beschleunigungssensor, der hohe Auflösung und breiten Frequenzgang mit digitaler Datenerfassung kombiniert.

Damit wird verlässliche Vibrationsmessung so leicht wie Audio-Aufnahmen mit einem PC, Touch-Pad oder einem Smartphone.

Der 333D01 Piezoelektrische Beschleunigungssensor dient als neues zuverlässiges Werkzeug für Testzwecke, Industrie- und Spezialanwendungen.

  • Kompatibel mit Windows, iOS, Linux, Android, und Mac OS
  • Aufzeichnug von Vibrationsdaten mittels PC, Laptop, Touch-Pad oder Smartphone
  • Verwedet die vorhandenen Treiber des Betriebssystems
  • Robustheit eines Piezoelektronischen Sensors mit erweitertem Dynamikumfang
  • Linear bis 8 kHz
  • 24 bit interner ADC
  • Wird von unabhängigen Software-Herstellern unterstützt

Video – Animation (englisch)

Dieses Animierte Video zeigt die Montage auf einem Motor und Anschluß an einen PC, ein Smarthone oder ein Touch-Pad.

Video – Anwendung (englisch)

The Model 333D01 is the first fully integrated and ruggedized packaging of a high-resolution, broad-frequency piezoelectric accelerometer with integrated internal digital data acquisition.

Taking reliable, quality vibration measurements is now as simple as recording audio input in a tablet or PC.

The 333D01 USB Accelerometer serves as a new high fidelity tool for the vibration test, industrial vibration monitoring and app specific markets.

Basic Usage

Model 333D01

The 333D01 is a plug and play USB digital accelerometer. Instead of outputting a voltage or current signal proportional to acceleration, it outputs digital samples.

By directly outputting digital samples from the sensor over USB, you bypass the need for a separate acquisition system, cables and adaptors, or specialized software. Because the 333D01 USB digital accelerometer appears as a USB microphone to the audio driver, any software that works with sound recording via USB (USB microphones, headsets) will work with the USB digital accelerometer.

Start measuring vibration

All you need to do is attach the sensor to the vibrating test surface of interest via the ¼-28 UNF mounting threads (or adhesive), plug the sensor into a computer or mobile device via USB port (On-The-Go), open your data capture software of choice, and you’re ready to go!

Mounting the sensor

The easiest way is with a temporary adhesive such as cyanoacrylate for smooth surfaces and “dental cement” for rough surfaces. Take care not to fill the stud mount hole by either filling it with wax or putty or using a stud mounted adhesive mounting base. *For more tips, an overview of mounting techniques can be found in the Dowloads section, Mounting.pdf.

Mounting accessories

The 333D01 has a ¼-28 thread in the center. Mounting studs and adhesive mounting bases can be purchased from a variety of vendors, for example PCB. Multiple thread adaptors are available to attach to other screw threads via mounting studs. Magnetic mounts are also available. Refer to the online sensor manual section on mounting for more details and best mounting practices.

Recording vibration signal data

After plugging the sensor into a computer or mobile device, simply select the 333D01 in the software’s interface and hit the record or capture button. You can also specify a specific sample rate or bit depth. The software should detect the 333D01’s capabilities from the device itself.

Saving vibration signal data

The 333D01 sends a stream of audio formatted data. The software you choose will need to have saving capabilities to store the data after capture. Typically, this will be in an audio format such as a .WAV file or an application specific format.

Sample rates

For general purpose use, a sample rate of 48 000 Hz will work for most applications. For specific frequency measurements, make sure the sample rate is at least twice the maximum expected frequency. For low frequency (< 20 Hz) applications the 8000 Hz rate is ideal.


The device is a single vibration sensing axis and the same signal can be found on both channels. Channel A is suitable for measurements up to ±20 g full scale while Channel B is the same signal scaled ±10 g full scale.

Number of simultaneously supported sensors

Because the sensor identifies as a USB audio device, multiple sensors can be active simultaneously though they WILL NOT BE synchronized. To use more sensors, simply plug in multiple USB hubs. The limit for the maximum number of USB device attached to a computer is 128, according to the USB specification.



Measurement Specifics

Supported sample rates

The 333D01 USB digital accelerometer supports standard audio sampling rates – 48 kHz, 44.1 kHz, 32 kHz, 22.05 kHz, 16 kHz, 11.025 kHz, and 8 kHz.

Supported bit depth

The 333D01 has 24-bit resolution, but can also output 16-bit resolution samples. This is selectable in audio driver software.

Frequency range

The 333D01 has a flat response from 2–8 000 Hz within ±5 % deviation of the calibrated sensitivity at reference frequency.

Low frequency capability of the 333D01

The 333D01 is within ±5 % deviation from 100 Hz down to 2 Hz. The -3 dB limit is typically 0.75 Hz.

High frequency capability of the 333D01

The 333D01 is within ±5 % deviation from 100 Hz up to 8000 Hz. The +3 dB limit is typically 15 kHz.

Amplitude measurement range

The 333D01 can nominally measure up to 20 g (196 m/s2) of acceleration through Channel A.

Channel B is the same signal scaled to nominally measure up to 10 g (98 m/s2) of acceleration.

Maximum frequencies for accurate recording and analysis

The maximum useable frequency depends on the select sample rate – cutoff occurs at ½ of the sample rate. For example, if the sample rate is 8 kHz, you can accurately measure and analyze frequencies up to 4 kHz.


Getting engineering units (g or m/s2)

The 333D01 comes with both a calibration certificate and calibration data stored in its internal memory. Software can access this internal data by reading the USB Serial Number descriptor. 333D01 optimized software can perform this task automatically, directly translating the sensor output to engineering units. 

See the Software Page for a list of supporting software and features.

Nominal calibration value

  • 36750 counts / (m/s2) (Channel A) and
  • 71974 counts / (m/s2) (Channel B)


Supported Windows versions

Windows® 7 and 8 offers full compatibility with the 333D01. Windows® XP is compatible, though limited to 16-bit resolution with standard Windows audio drivers.

Android tablets and phones

The 333D01 is compatible with both Android phones and tablets, through the use of a USB OTG (On The Go) cable.

Can the sensor be used on Mac and iPhone?

The 333D01 works with Macintosh operating systems and iOS mobile platform.

For iOS devices with a lightning connector, Apple’s Lightning to USB Camera Adapter can be used.


Connection to a mobile device

Plug the 333D01 USB cable into a USB On-The-Go (OTG) adaptor cable.

Connection to  a laptop or PC

Plug the 333D01’s integrated USB cable into any USB port.

Usage of USB extender cables

One or multiple USB extender cables or USB hubs can be used. The maximum length able to be reached is 10 km using Fiber Optic cabling, 100 m using Copper, and, roughly, 5 m using a passive (just wires) extender cable.

Creating Scripts and Apps

Build your own scripts or applications for collecting and processing vibration signals from the 333D01



MATLAB® modules

The base MATLAB® package can read data from the sensor using Windows® DirectSound drivers. However, more functionality can be obtained with the DSP Toolbox using the dsp.AudioRecorder System object.

ASIO Questions

What does ASIO stand for? (What is ASIO?)

ASIO stands for Audio Stream Input and Output. (ASIO is a low latency, high fidelity interface directly between software and the sound card, or in this case the 333D01 hardware. A free implementation can be found in ASIO4All (ASIO4ALL_2_13_Deutsch.exe).

What does ASIO do?

ASIO allows you to utilize the full features of the sensor by bypassing Windows restrictions and directly accessing the hardware. Specifically, it allows you to choose any combination of bit depth and sample rate supported by the 333D01.

Why should I use ASIO?

Though you can operate with the standard Windows DirectSound drivers, it requires you to match the sample rate chosen in software with the sample rate listed in the Windows Recording Devices interface. If these sample rates do not match, Windows resamples incoming data which will corrupt the integrity of the data. In addition, Windows DirectSound only permits the use of 24-bit samples with 44.1 kHz and 48 kHz sample rates. The sensor itself allows any of its 7 available sample rates to be used with either 24-bit or 16-bit resolution.


Sensitivity [1, 2]Channel A:   0.44 % FSV/m/s2
Channel B:   0.86 % FSV/m/s2
Measurement Range [3]Channel A:   ± 196 m/s2
Channel B:   ± 98 m/s2
ADC Bandwidth (-3 dB)0.155 Hz to 22 900 Hz
Frequency Range (±5 %)2 Hz to 8 000 Hz
Frequency Range (±10 %) [3]1.5 Hz to 11 000 Hz
Frequency Range (±3dB) [3]0.9 Hz to 15 000 Hz
Resonant Frequency≥ 25 000 Hz
Mounted Resonance [3]17 400 Hz
Mounted Resonance Amplification [3]200 %
Broadband Resolution [1]   (1 Hz to 10 000 Hz)0.0245 m/s2 pk
Non-Linearity [4] ≤ 2 %
Transverse Sensitivity [3]≤ 5 %

Overload Limit (Shock)68 647 m/s2 pk
Temperature Range-10 °C to +70 °C
Temperature Coefficient 0.18 % / °C

Communication StandardUSB 2.0 Full Speed
Power Consumption [3]≤ 45 mA
Internal ADC24 bit
Supported Sample Rates   

24 bit @ 48, 44.1, 32, 22.05,
16, 11.025, 8 kHz

16 bit @ 48, 44.1, 32, 22.05,
16, 11.025, 8 kHz

Size ─ Hex25.4 mm
Size ─ Height66.0 mm
Weight131 gram
Mounting Thread1/4-28 UNF
Mounting Torque2.7 Nm to 6.8 Nm
Sensing ElementPiezoelectric Ceramic
Sensing GeometryShear
Housing MaterialStainless Steel
SealingWelded Hermetic
Electrical ConnectorUSB Type A Male
Electrical Connection PositionTop
Cable (Integral) Length 2.9 m

[1] Conversion Factor 1 g = 9.80665 m/s2
[2] FSV = Full Scale Value
[3] Typical
[4] Zero-based, least square straight line method

In the interest of constant product improvement, specifications may change without notice.

All specifications are at room temperature unless otherwise specified.