Fast Digital Electrometer

The F100 measures currents from nA to mA from an external detector. For example Faraday cups, ion chambers, beam position monitors, or photodiodes.

The primary application is real-time dosimetry for proton therapy. The F100 integrates current into a total charge. It generates a monitor pulse for each defined aliquot of total charge. After the total charge reaches a predetermined target its digital logic output triggers. This digital output connects up to a beam command or pneumatic actuator. The unit could be stand-alone or integrated into a larger control system.

The F100 can use an auxiliary high-voltage output up to 2kV. The source is suitable for electrical suppression of secondary electrons in Faraday cups like the BC-75.


  • Multirange current to voltage converter
  • Dynamic range 0.1 nA to 10 mA
  • Extended dynamic range option up to 200 mA
  • Integrated digitization and filtering
  • Integrated precision calibration source with loopback option
  • High voltage output option
  • Pneumatic actuator control option
  • RS-232, USB and fiber-optic interfaces


  • Faraday cup readout
  • Ionization chambers
  • Photodiodes
  • General precision current measurement

Integrated High Voltage

  • Avoids the need for a separate HV suppy
  • Precise programmable control of voltage
  • Choice of polarity and range up to positive or negative 3000 V
  • Short circuit protection and independent output voltage monitoring

Fiber-Optic Communications

Measurement data is transmitted through state-of-the-art fiber-optic cables. The benefits are numerous compared to other forms of data transmission.

  • Fiber-optics are immune to electrical interference
  • Minimal attenuation of light through fibers
  • Fast messaging over enormous distances
  • Radiation hard fiber materials

EPICS Support

Integrate device data collection and configuration into an EPICS system, without writing a single line of code using IG2.

  • Runs on Windows 7/8/10 and Debian Linux
  • Change PV names with simple XML configuration
  • Connect to multiple Pyramid devices at once
  • Add custom scale factors and offsets on a PV basis
  • Never have to recompile
  • Professional Pyramid support for bugs and features