I128 - 128 Channel Charge Integrator Digital Electrometer

The I128 is Pyramid's flagship dosimeter instrument. It enables our scanning nozzle to deliver unparalleled precision and speed.


  • 128 parallel charge integrating channels
  • 1 gated integrator channel for dose plane
  • 1 trigger input and trigger pass-through
  • 1 fiber-optic pulse output proportional to dose plane
  • 1 fiber-optic output for beam control
  • 1 high voltage supply output with loop-back verification
  • Safety relay output
  • Ion chamber temperature, pressure, and humidity sensor inputs
  • Fiber-optic loop control handling many Pyramid slave devices
  • Capable of executing and verifying pencil beam treatment plans
  • Integrated precision current sources for on demand calibration
  • 10kHz buffered data available over Ethernet RPC connection
  • Compact 1U 19" format


  • Paired with an IC128-25
  • Particle therapy beam position measurement and dosimeter
  • Multi-strip ionization chamber measurement
  • Particle range verification measurement
  • General high desnity low-current measurement

HV emco

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 1000 V
  • Short circuit protection and independent output voltage monitoring

IG2 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

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