The TBM-IC-RN Radon Detector detects 10 picoCi/l of radon in 5 seconds and detects public release level of radon in less than 10 minutes. These ion chambers are now smaller and lighter and based on newest stable, essentially drift-free electrometer technology. The radon detector consists of an air ion chamber (2.9" D x 3.5" L) coupled to a stable solid state MOSFET input electrometer with built-in A to D converter to read out directly in nCi/liter. Range is 10 picoCi/l to 1 µCi/l. Ion Chamber walls are 180 mg/cm2 graphite lined methacrylate walls and provide accurate "air equivalence."
Detector: Free Air ion chamber 2.9'' dia x 3.5'' long.
Internal volume 300 cc.
Wall & Cap: Methacrylate, graphite lined 180 mg/cm2 walls and 540 mg/cm2 cap.
Readout: LCD: 6 Digits Rate; 8 Digits Integrate.
Green LED 10 pulses/sec per mR/h
Red Over-range Indicator
Rate 6 digit 10 picoCi/liter to 1 µCi/liter in a single
Integrate 8 digits 1 picoCi/liter* to 100,000 pCi/liter in a single range.
*less than 1 minute Indicator.
Note: TBM-IC-RN in Integrate Mode has no timer.
User must provide clock or stopwatch.
Electrometer: Solid State MOSFET input.
Electronics: A-D converter LCD drivers.
10 ea. (Button) NEDA CR-1220 - shelf life 7 years.
6 ea. (AA) NEDA 15A - 1000hr.
Dimensions: 11" x 4" x 8" including handle and optional pump.
Air Flow: Passive Diffusion or lightweight Battery powered pump.
Weight: 26 oz. complete with batteries. Optional pump is 2 lbs.
Options: Readout in Si units: Bq/m3.
Optional Pump: Flow Rate: 4 SCFH. Batteries: 2 AA Batteries.
Working Level and Rn-222 Radon Gas vs. Radon Daughters:
Option 1: Particulate pre-filter removes much of the Radon daughters from the in-coming air stream but lets the Radon gas pass into the ion chamber for measurement.
Option 2: Activated charcoal pre-filter which stops much of the Radon gas is also available.