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Accelerometer MiniSense 100

Image MiniSense 100

The MiniSense 100 is a low-cost cantilever-type vibration sensor loaded by a mass to offer high sensitivity at low frequencies.

Pins are designed for easy installation and are solderable. Horizontal and vertical mounting options are offered. The active sensor area is shielded for improved RFI/EMI rejection.

Rugged, flexible PVDF sensing element withstands high shock overload. Sensor has excellent linearity and dynamic range, and may be used for detecting either continuous vibration or impacts. The mass may be modified to obtain alternative frequency response and sensitivity selection (consult factory).

The MiniSense 100 acts as a cantilever-beam accelerometer. When the beam is mounted horizontally, acceleration in the vertical plane creates bending in the beam, due to the inertia of the mass at the tip of the beam.

Strain in the beam creates a piezoelectric response, which may be detected as a charge or voltage output across the electrodes of the sensor. The sensor may be used to detect either continuous or impulsive vibration or impacts.

For excitation frequencies below the resonant frequency of the sensor, the device produces a linear output governed by the "baseline" sensitivity. The sensitivity at resonance is significantly higher.

Impacts containing highfrequency components will excite the resonance fre-quency, as shown in the plot above (response of MiniSense 100 to a single half-sine impulse at 100 Hz, of amplitude 0.9 g). The ability of the sensor to detect low frequency motion is strongly influenced by the external electrical circuit.


Features

  • High Voltage Sensitivity (1 V/g)
  • Over 5 V/g at Resonance
  • Horizontal or Vertical Mounting
  • Shielded Construction
  • Solderable Pins, PCB Mounting
  • Low Cost
  • < 1% Linearity
  • Up to 40 Hz (2,400 rpm) Operation Below Resonance

Applications

  • Washing Machine Load Imbalance
  • Vehicle Motion Sensor
  • Anti-Theft Devices
  • Vital Signs Monitoring
  • Tamper Detection
  • Impact Sensing

Documents and Files

File Date Size
Model MiniSense 100 accelerometer datasheet (English) 04-05-2015 335KB
Accelerometer basics (English) 16-10-2008 109KB