• ORM400 benchtop optical radiation meter

Offering short-circuit detector operation and an impressive six decades of gain, wide dynamic range measurements with excellent linearity can be realised.

Including an auxiliary voltage input, the ORM400 can be operated from the front panel or fully automated over the USB interface. Over-load and under-load flags are included to enhance optimal remote operation.

Core benefits


  • Double width module housed within the 417/417T unit
  • Dual input, six decade picoammeter
  • Virtual ground (virtual null) input
  • Auxiliary voltage input
  • Front panel control
  • Fully programmable via USB 2.0 interface


Channel 1 input Current input to picoammeter
Channel 2 input Current input to picoammeter
Auxiliary input Voltage input to ADC
Gain ranges 1010-105 V/A
Maximum current Input 100µA
Frequency response DC to 30Hz
Gain accuracy +1%
Gain stability 200ppm/°C
Output stability 5ppm/°C to 500ppm/°C depending on sensitivity
Linearity < 0.025% departure from linearity from zero to full scale
ADC resolution 4½ digit BCD (0 to 19999) i.e. > 14 bit resolution
ADC integration time 100ms
Auxiliary input range 0- 9.8V
Picoammeter input impedance Virtual earth
Auxiliary input impedance 1 MΩ

Interface & Mechanical

Interface USB
Control Front panel via keypad/ USB
Front Panel Controlled Features Input select, gain range select, auxiliary input select, integration and more.
Connector BNC
Display LCD


ORM400 Picoammeter
ORM400_LS Nanoammeter (gain ranges 109-104 V/A)



Width 272 mm
Height 125 mm
Depth 165 mm
Additional rear clearance required 65 mm
Weight 0.95 kg

Ordering Information

ORM400 Picoammeter
ORM400_LS Nanoammeter
PSU_5V_AUS ORM400 power supply, Australia/China plug
PSU_5V_EU ORM400 power supply, European plug
PSU_5V_UK ORM400 power supply, UK plug
PSU_5V_US ORM400 power supply, North America/ Japan plug

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