Introduction; Instrument Description; Figure 1-1: Model Ro-20 Ion Chamber - Thermo Scientific RO-20 Operating Manual

1. Introduction

1.1

Instrument Description

The Model RO-20 Ion Chamber (Figure 1-1) is a portable air ion chamber instrument used to
detect beta ( ß ), gamma (γ) and x-ray radiation.
The RO-20 has five linear ranges of operation to measure exposure rate for x-ray and gamma
radiation. The ion chamber is vented to atmospheric pressure.
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The RO-20 is calibrated to γ radiation ( Cs).
A single rotary Function Switch turns the instrument off, provides battery checks, checks the
Zero setting, and selects the range of operation.

Figure 1-1: Model RO-20 Ion Chamber

Ro-20 RB-XXX-XXXXXX E 1-1
Löw 08.10.2008