Micro Magnetics' STJ-3D is an integrated 3-axis magnetic solid-state sensor used to measure absolute magnetic field vectors with three field components along the X-, Y-, and Z-axis. Based on the state-of-the-art technology of magnetic quantum mechanical tunneling junction (MTJ), the sensor is featured with high sensitivity, large dynamic range, low signal noise, and low power consumption. The STJ-3D is easy to use, requiring only an applied voltage (up to 24V). It outputs three corresponding voltages for 3-axis magnetic field components. There is no need to regularly apply a large current pulse to cure the magnetic structure disordered by field sensing, as needed by other types of sensors. The internal magnetic structure of STJ-3D is robust against even Tesla-scale external field, remaining operational as a fresh sensor after extensive use.
STJ-3D operates in a wide frequency range between DC to about 7 MHz. The applied voltage can be either DC or AC. Electronic noise can be minimized by using AC modulation on the applied voltage.
One advantage of STJ-3D is that it has a built-in thermometer, allowing the measurement of both temperature and magnetic field to be measured simultaneously.
Micro Magnetics' STJ-3D is ideally suited for a wide range of applications.
Micro Magnetics also offers custom solutions -- we design and build custom sensing products which are tailored to the customer's specific application.
Micro Magnetics' low-noise three-axis magnetic sensor. Features:
- Compact physical size: 15 x 17.4 x 10.5 mm (0.6 x 0.69 x 0.41 inch)
- Ultralow field noise: 10 nT or 0.0001 Gauss
- Large magnetic field dynamic range: +/- 20 Gauss
- High sensitivity: 1-4 mV/V/Oe
- Broad frequency range of magnetic field: DC to ~ 7 MHz
- Absolute field measurement
- Operation: up to 24 VDC or VAC
- Built-in temperature sensor
- High field direction accuracy
- Low power consumption
- No need for magnetic reset pulse circuit
- Analog and bipolar magnetic field sensor
- Ultrasensitive magnetic field sensing
- Static and dynamic measurement of magnetic field
- Detection of sub-surface magnetic activities
- Electronic compass and navigation
- Non-contact sensing of electrical current
- Smart grid diagnostics
- Medical devices
- Spatial mapping of magnetic field
- Measurement of magnetic spectrum from devices and environment
- Measurement of earth and geo-magnetic field