||Continuous Radon Gas Monitor; Long-term/Short-term screener; Sniffer, with small tube "snout", to search for radon and thoron entry points.
||Measures radon in air, soil, and water (with RAD H2O accessory)
||Monitor: 0.7 counts/min/pCi/l; Boosted by the High Gain Modification (i.e. greater sensitivity) and Large Chamber (long-term stability)
||0.1 ----> 10,000 pCi/l (4 ---> 400,000 Bq/m3)
||1,000 radon concentrations, and associated data. Can be read out on LCD, downloaded to PC and/or printed out on HP IR printer. Summary of run shows high, low, average and standard deviation of readings.
|PRINCIPLE OF OPERATION
||Electrostatic collection of alpha-emitters with spectral analysis.
|BUILT-IN AIR PUMP
||Nominal 1 liter/minute flow rate. Inlet air filter; Inlet and outlet air connectors.
||Pulse height spectrum of alpha distribution verifies radon/thoron, and also shows the RAD7 is operating properly. Accurate determination of the alpha particle energies creates a radon signature that allows discrimination of radon and thoron's alpha particles from those of other isotopes.
|FAST LOW-LEVEL READINGS*
||In Continuous Monitor mode, RAD7 measures the EPA action level of 4 pCi/l in just 1 hour (60 minutes), with standard deviation of 10%. Since the RAD7 has virtually no background, it has a much lower detection threshold than other electronic detectors, easily measuring down to 0.1 pCi/l
|RECOVERY IN MINUTES*
||Recovers from high radon exposure with a 3.05 minute half-life: to less than 10% of peak value in 12 minutes; to less than 1% of peak value in less than 30 minutes. Drops from 20,000 to 1 pCi/l in one hour.
||This setting starts a test run in Sniff mode, then switches to Normal mode after the first 3 hours. No more waiting for equilibrium. Gives quick response, followed by statistical precision.
||Gives continuous update of radon levels so you can see the trend at all times, not just at pre-set intervals.
COMPUTER LCD DISPLAY 2 line X 16 character, alpha-numeric. easy to read
||AC/Battery powered - 5 AH 6V batteries. Automatic charge when plugged in and switched on. Continuous battery operation: 72 hours in Monitor mode
||Hewlett-Packard Model HP 82240B
RS-232 PORT Computer/modem hookup