IMPROVEMENTS RELATING TO RADIOACTIVITY ALARM SYSTEMS
Patent
·
OSTI ID:4065990
An alarm system for a radioactivity air sampling monitor in which the sampling time is automatically adjusted to suit the particular contamination level involved is described. The apparatus includes a dust sampling device and a detector responsive at the end of each sampling period to the radioactivity level of the sample collected in that period. A counter, operable by the detector, indicates the level of radioactivity after a certain counting period has elapsed. A device resets the counter to zero at the end of each counting period. An alarm is actuated by the counter on exceeding a predetermined maximum count. At a predetermined lower count in one of the counting periods a switching means is actuated by the counter to temporarily inhibit the reset device so that the counter counts over a number of successive sampling periods and registers the total count for all these periods. (M.C.G.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-016273
- OSTI ID:
- 4065990
- Report Number(s):
- GB 952948
- Country of Publication:
- United Kingdom
- Language:
- English
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