The Model RO-20 AA is a portable air ionization chamber instrument, used to detect beta, gamma, and x-radiation, with five linear ranges of operation to measure exposure from background to 50 R/h full scale.

Features:

• Measures Gamma or X-ray exposure rate
• Large Backlit Display
• Non-Mechanical Range Switching
• Long Battery Life
• Temperature Compensated Measurements

Detector

• Five linear ranges: 0-5, 0-50, 0-500 mR/hr; 0-5, 0-50 R/h
• Air filled ionization chamber vented to atmosphere
• Detector Volume 13.4 in3
• 1,000 mg/cm2 walls
• Chamber window 7 mg/cm2
• Beta shield 1,000 mg/cm2
• +/- 30% from 8 keV to 6 MeV
• +/- 15% from 33 keV to 6 MeV

External Controls

• Rotary switch for Off, Battery 1 Check, Battery 2 check, Zero, 5, 50, 500 mR/h; 5-50 R/h
• Light switch
• Zero knob

Physical

• Size: 7.9" long x 4.2" wide x 7.7" high
• Size: 20.1 x 10.7 x 19.6 cm
• Weight: 3.6 lbs with batteries (1.6 kg)

Options

• Check Source (CS-7A)

View product information sheet. (.pdf)