Principle of Operation

Electrostatic collection of alpha-emitters with spectral analysis

Passivated Ion-implanted Planar Silicon detector

SNIFF mode counts polonium-218 decays

NORMAL mode counts both polonium 218 and polonium 214 decays

Built-In Air Pump

Nominal 1 liter/minute flow rate

Inlet and outlet Luer connectors

Connectivity

RS-232 port up to 19,200 baud rate

USB adaptor is included with every RAD7

Measurement Accuracy

+/-5% absolute accuracy, 0% - 100% RH

Nominal Sensitivity

SNIFF mode, 0.25 cpm/(pCi/L), 0.0067 cpm/(Bq/m3) NORMAL mode, 0.5 cpm/(pCi/L), 0.013 cpm/(Bq/m3)

Radon Concentration

Range

0.1 - 20,000 pCi/L (4.0 - 750,000 Bq/m3)

Intrinsic Background

0.005 pCi/L (0.2 Bq/m3) or less, for the life of the instrument

Recovery Time

Residual activity in Sniff mode drops by factor of 1,000 in 30 minutes

Operating Ranges

Temperature: 32° - 113°F (0° - 45° C) Humidity: 0% - 100%, non-condensing

Cycle Range

User controllable number of cycles, from 1 to 99 to unlimited, per run

User controllable cycle time, from 2 minutes to 24 hours