Preventing EMI Noise with the Spicer System

Spicer’s magnetic field cancellation system offers unparalleled protection against AC and DC fields for high-resolution electron microscopes. The Spicer System is built to integrate effortlessly around an electron microscope, providing maintenance-free EMI shielding for any research facility or laboratory. Electron microscopy users repeatedly pick the Spicer System as it is an economical solution that can greatly enhance the imaging of most electron microscopes working in environments with disruptive EMI noise.

Product Highlights

Two models, SC22 and SC24, for various isolation requirements are available. The SC22 is designed to cancel AC fields only, while the SC24 is designed to cancel both AC and DC fields. Both systems are built to provide protection against fluctuations in magnetic fields due to:

  • Elevators
  • Subways
  • Moving vehicles
  • Electrical distribution equipment

SC22 Product Highlights

  • Automated set up using an intelligent user interface
  • Low-cost, high-performance system
  • Full three-axis (X, Y, Z) system, up to 60 mG (6.0 μT) pk-pk range
  • Cancels AC fields from 2.5 Hz to 5 kHz, 50x field improvement at 60 Hz
  • Supports two sensors for high gradient fields and TEMs
  • Adapts to field variations within 100 μs

SC24 Product Highlights

  • Simultaneous AC and DC field display with the choice of Gauss or Tesla units
  • Use AC sensors for canceling 50/60 Hz AC line fields or DC sensors for canceling train and tram DC fields and 50/60 Hz
  • Adapts to field variations within 100 μs
  • Mixes two sensors to produce a virtual sensor “inside” the EM column
  • Touch screen intelligent user interface with DC reset and automatic setup
  • Integral test field generator
  • Ethernet and USB ports for remote monitoring and operation


The Spicer System broadens the available installation locations for electron microscopes by enabling them to be kept in places where varying high magnetic fields exist. Therefore, they can be set up at sites formerly rejected because of magnetic field interference.

Common applications include but are not limited to:

  • MRI machines
  • Transmission electron microscopes
  • Scanning electron microscopes

Preventing EMI Noise with the Spicer System

SC22 AC Sensor
SC24 DC and AC Sensor
TEM Room with Double Loop Cables
Performance - Magnetic Field Cancelling Performance of the SC24 System
SEM Image – Without EMI Cancellation
SEM Image – With EMI Cancellation
Technical Specifications

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