AX3
  • AX3, top angle
  • AX3, with cable
  • AX3, with black band
  • AX3, with blue band
  • AX3, with coin

AX3

3-axis logging accelerometer

£139.00 – £149.00 exc VAT

AX3 is a data logger. It features a state of the art MEMS 3-axis accelerometer and Flash based on-board memory. The device incorporates a real time quartz clock and temperature sensor.

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Inside the AX3

Exploded view of the AX3 electronics, with the memory chip lifted above the circuit board.
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Fig. 1 Exploded view of the AX3 electronics. Numbered markers correspond to the component notes.

  1. Microprocessor

    It is the Microprocessor’s job is to talk to the host computer over USB, negotiate battery charging and to precisely keep the time. In simple terms, the microprocessor is the brain of the sensor.

  2. Accelerometer

    This tiny component is about the size of a grain of rice. The accelerometer is used to detect movement, vibrations and orientation changes in all 3-axis at incredible precision. The accelerometer can be sampled at configurable rates and precision and simultaneously to other sensors.

  3. NAND Memory

    This memory chip is used to store all the data the microprocessor pulls from the sensors. Each sample is stored along with a precise time- stamp; this allows for accurate signal reconstruction. The data stored on the NAND Memory is in raw format has error checking and correction (ECC) built in.

  4. Lithium Battery

    Content to be supplied by Axivity.

  5. Light Sensor

    The light sensor can be used to help determine periods of wear as well as provide useful environmental data.

  6. Light Emitting Diode

    The LED indicated what state the sensor is in; charging, standby, recording or communicating to a computer.

  7. Temperature Sensor

    The temperature sensor gives a sense of outside environment temperature and also if the sensor is being worn.

Specification

Physical Parameters
Dimensions23 x 32.5 x 7.6 (mm)
Weight11g
Environmental Protection
Moisture IngressIPx8 1.5m for 1 hour
Dust IngressIP6x
Typical Capabilities
Memory512mb flash non-volatile
Accelerometer Sample Rate12.5 - 3200Hz configurable
Battery Life30 days @ 12.5Hz; 14 days @ 100Hz
Accelerometer Range±2 / 4 / 8 / 16g configurable
Accelerometer ResolutionUp-to 13 bit

Used in published research

Axivity devices appear in peer-reviewed studies across physical activity, sleep and clinical research.

View publications

Software

Open Movement GUI configures the device and reads raw data. Free and open source.

Open Movement on GitHub