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The Model 190 Survey and Count Rate Meter is an easy-to-use instrument designed to meet the high technology requirements of Health Physics
• 100 – 120 VAC
It did appear to hold a charge but we can not guarantee that the battery will hold a charge long term
Rapid scanning of changing field intensities
Ludlum Model 9-4 Ion Chamber Johnson The Model 190 Survey andLudlum Model 9 4 Ion Chamber The Ludlum Model 9 4 is a rugged air ionization chamber for performing beta gamma dose rate measurements over a five decade span ranging from 0 to 500 mSv h (0 to 50,000 mR hr). The ion chamber automatically compensates for changes in temperature and pressure. The chamber wall (including the instrument case) is 1000 mg cm2. A 1000 mg cm2 retractable beta shield allows beta measurement with a 7 mg cm2 window. The six