Model 2221

The Model 2221 is a general purpose ratemeter and scaler with an analog display for optimally viewing the count rate and rate of change through all possible four decades of display. It is accompanied by a digital LCD, which can present either the ratemeter data or the scaler counts.

Control functions available include: decade range selection, scaler count time, power on/off, response setting, LCD analog/digital switch, PHA window switch, lamp, audio divide by, audio volume, count zeroing, and scaler start/halt.

The wide range high voltage supply supports a variety of detectors with additional threshold and window settings that facilitate switching between gross counts and the energy band of interest. The instrument housing is cast aluminum with a separate battery compartment and accompanying metal handle. This design delivers industrial robustness, quality, capability, and versatility.

Features

• Digital Ratemeter with Built-In Scaler
• Dual Analog Meter & Digital LCD Presentation
• Rich Array of Discrete Front Panel Controls
• Single Channel Analysis
• Optional RS-232 Data Output
• Wide Range HV
  Overload Protection
• Overload Protection