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Model 451B Beta Slide Ion Chamber
The Fluke Model
451B Ion Chamber is a hand-held battery
operated unit designed for use in both rugged and normal environments. The
Model 451B measures alpha, beta, gamma and X-ray radiation. The Model 451B
Ion Chamber utilizes modern microprocessor and LCD technology and features a rugged ionization
chamber with a mylar window and protective steel mesh. The beta
shield serves as an equilibrium thickness for photon measurements. The
ergonomic handle, features a large diameter cushioned grip and is designed
to reduce fatigue associated with extended use. The case is constructed of
lightweight, high strength materials and is sealed against moisture. The
user must specify R or Sv when ordering. The display features an analog
bar graph, 2 1/2 digit digital readout, low battery and freeze mode
indicators. User controls consist of an ON/OFF button and a MODE button.
The unit is auto-zeroing and auto-ranging. The display features circuitry
that automatically activates the backlight in low ambient light
conditions. The RS-232 interface can be connected directly to a computer
for use with the Excel add-in for Windows
®
, enhancing the functionality
of the instrument. The software allows for data retrieval, user parameter
selection and provides a virtual instrument display with audible (requires
sound card) and visual alarm indication. The software may be customized by
the user for specific applications.
- High
sensitivity measurements of exposure
and exposure rate
- Available with dose
equivalent energy response (SI units)
- Fast response to measure
radiation from leakage, scatter beams and pinholes
- Ergonomic, anti-fatigue
handle with replaceable grip and wrist strap
- Sliding shield for alpha
and beta discrimination
- Excel add-in for Windows
® for data logging and selection of instrument operating parameters
(optional)
- Low noise chamber bias
supply for fast background settling time
- Choice of bright, highly
visible colors
- Easy touch keys
| DS 451B Ion Chamber |
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| DS 451B Ion Chamber (Sv) |
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| 451 XL Software and Cable |
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For questions, or to order, call 888 368 9118, 310 589
0601 or email: sales@drct.com
Waterproof Pelican
Cases Available
Specifications
451B Ion Chamber (non-pressurized) with Beta Slide
Specifications:
| Radiation detected by
451B: |
| |
Alpha above 4 MeV, Beta above 100 keV, and
Gamma above 7 keV |
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| Operating ranges: |
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0 to 5 mR/h or 0 to 50 µSv/h
0 to 50 mR/h or 0 to 500 µSv/h
0 to 500 mR/h or 0 to 5 mSv/h
0 to 5 R/h or 0 to 50 mSv/h
0 to 50 R/h or 0 to 500 mSv/h |
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| 451B
Accuracy: |
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Within 10% of reading between 10% and 100% of
full scale indication on any range, exclusive of energy response.
Calibration source is 137Cs |
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| Detector: |
| Chamber: |
349 cc volume air ionization |
| Chamber wall: |
246 mg/cm2 thick phenolic |
| Chamber window: |
1.7 mg/cm2 Mylar, protected by steel
mesh, 46 cm2 detection area |
| Beta slide: |
440 mg/cm2 |
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| Controls |
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| Automatic features |
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Auto-zeroing, auto-ranging, and auto-back |
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| 451B Response time: |
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0 to 5 mR/h (0 to 50 µSv/h) – 8 sec
0 to 50 mR/h (0 to 500 µSv/h) – 2.5 sec
0 to 500 mR/h (0 to 5 mSv/h) – 2 sec
0 to 5 R/h (0 to 50 mSv/h) – 2 sec
0 to 50 R/h (0 to 500 mSv/h) – 2 sec |
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| Power requirements for
451B: |
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Two 9 V alkaline, 200 hours operation |
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| Warm-up time: |
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| Modes: |
| Integrate mode: |
Operates continuously 30 seconds after the
instrument has been turned on. Integration is performed even if the
instrument is displaying in mR/h or R/h |
| Freeze mode: |
Will place a tick mark on the bar graph display
to hold on the peak displayed value. The unit will continue to read and
display current radiation values |
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| 451B
Display: |
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LCD analog/digital with backlight |
| Analog: |
100 element bar graph 6.4 cm long. Bar graph is
divided into 5 major segments, each labeled with the appropriate value
for the range of the instrument |
| Digital: |
2.5 digit display is followed by a significant
zero digit depending on the operating range of the instrument. The units
of measurement are indicated on the display at all times. Digits are
0.25 in (6.4 mm) high. Low battery and freeze indicators are also
provided on the display |
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| Environmental: |
| Temperature range: Relative humidity:
Geotropism: |
- 4º to + 158ºF (- 20° to + 70°C) 0 to 100%, @
+ 60°C Less than 1% |
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| Dimensions: |
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4 (w) x 8 (d) x 6 in (h) (10 x 20 x 15 cm) |
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| Weight: |
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