The GS-4100A Radiometer, with its internal microprocessor, represents a dynamic concept in instrumentation for seven radiation measurements. It has no adjustments – no dark current, no zero or high-voltage controls, no range switches, no displays, no indicators, no calibration controls and no shutter and time-constraint selection switches. It is simply a box with an on/off switch, controlled from your computer via a two-way RS-232 interface.

Featuring full-logic and control circuitry for spectral and spatial scanning applications, the unit works with any Gamma Scientific detector assembly, including photomultiplier and silicon. It also operates any Gamma Scientific NM-Series digital holographic monochromator or GS-2110A digital scanning telemicroscope.

The system includes an electrometer amplifier, a high-voltage power supply, an A/D and D/A converter and a microprocessor. All firmware is in machine code; this significantly speeds up system operation. Additionally, all digital-scan control, calibrator and shutter-control circuits are included.