Radiation Monitoring
451P Pressurized μR Ion Chamber Radiation Survey Meter
The auto‐ranging 451P ion chamber radiation survey meter features a
pressurized ionization chamber, providing enhanced sensitivity (μR resolution)
and improved energy response to measure radiation rate and dose from x‐ray
and gamma sources.
Key Features
• High sensitivity μR measurements of rate and dose simultaneously, with the
capability to record peak rate
• Ergonomic, anti‐fatigue handle with replaceable grip, wrist strap and tripod
mount
• Programmable flashing LCD display and audible alarm
• Easily‐accessible battery door (operated by two 9‐volt alkaline batteries) on the
outside of the bottom case
• RS‐232 communications interface with oponal Windowsbased Excel add‐in for data
logging
• Available with dose equivalent energy response (SI units)
Radiation detected | Beta above 1 MeV, Gamma and x ‐rays above 25 keV |
---|---|
Operating ranges | 0 to 500 μR/h or 0 to 5 μSv/h |
0 to 5 mR/h or 0 to 50 μSv/h | |
0 to 50 mR/h or 0 to 500 mSv/h | |
0 to 500 mR/h or 0 to 5 mSv/h | |
0 to 5 R/h or 0 to 50 mSv/h | |
Accuracy |
Within 10% of reading between 10% and 100% of full‐scale indication on
any range, exclusive of energy response. |
451B Ionization Chamber Survey Meter with Beta Slide
The auto‐ranging 451B ion chamber survey meter measures radiation rate and accumulated
dose from beta, gamma and x‐ray radiation sources.
Radiation detected | Alpha above 7.5 MeV, Beta above 100 keV, and Gamma above 7 ke V |
---|---|
Operating ranges | 0 to 50 R/h |
Digital Pocket Dosimeter (Bleeper)
The Bleeper is a simple, convenient instrument for alerting personnel to the presence of x‐ray or gamma radiation.
The instrument operates continuously and provides a clear, audible indication of dose rates.
While it produces a “bleep every 15 minutes for normal background radiation, the
frequency of the “bleeps increases with the dose rate until a continuous tone is
achieved in high radiation fields.
Sensitivity to background
radiation: |
Approx. 1 bleep per 15 minute s.
1 mR/hr: Approx. 1 bleep per 20 secon d s. 100 mR/hr and up: Continuous signal (to at least 6000 R/ hr) |
---|---|
Energy range: | 4 5 keV/h t o 6 Me V |
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