Constant flow radon gas monitor
This patent covers a method and system to continuously monitor the radon concentration in air. As disclosed, these readings are made in situ in a uranium mine to indicate whether safe working conditions exist therein. The apparatus forming this invention has one or a series of detectors each having: a filter network; a flow control valve; a scintillation cell; a flow meter; a gas pump; a photomultiplier tube with a voltage control circuit; and a signal discriminator with an amplifier and shaper circuit. External of the detectors and connected thereto is a counting and recording system which counts and records the voltage pulses which are indicative of the alpha count on the detector cell. When connected each detector can be sequentially monitored for a predetermined time interval by the counting system so that the local radon level can be continuously monitored for 24 hours per day seven days a week.
- Assignee:
- EDB-79-014050
- Patent Number(s):
- US 4053775
- OSTI ID:
- 6575030
- Resource Relation:
- Patent File Date: Filed date 29 Jan 1976
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
RADIATION MONITORS
DESIGN
RADON
RADIATION MONITORING
AIR FILTERS
PULSE DISCRIMINATORS
PULSE SHAPERS
PUMPS
RECORDING SYSTEMS
SCINTILLATION COUNTERS
URANIUM MINES
DISCRIMINATORS
ELECTRONIC CIRCUITS
ELEMENTS
EQUIPMENT
FILTERS
MEASURING INSTRUMENTS
MINES
MONITORING
NONMETALS
POLLUTION CONTROL EQUIPMENT
PULSE CIRCUITS
RADIATION DETECTORS
RARE GASES
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments