Model 451P Ion Chamber: Dose & Dose Rate - order online
The Fluke Model 451P Ion Chamber is used in a wide range of medical and health physics applications. The Model 451P Ion Chamber was designed to measure leakage and scatter around diagnostic X-ray and radiation therapy suites. Also, the Model 451P is ideal for site surveys and is regularly used by X-ray manufacturers, radiation therapy, government agencies, state inspectors, research labs, biomedical technicians, and in airports for baggage inspection equipment maintenance. This Ion Chamber was manufactured by Victoreen which was owned by Inovsion, Cardinal Health, Syncor, and presently Fluke Biomedical.
| DS 451P Ion Chamber | 451P-RYR | $2716 |
order online (U.S. only) |
| 451 XL Software and Cable | 451EXL | $582 |
order online (U.S. only) |
Waterproof Pelican Cases Available
For questions or to order, call 888 368 9118, 310 589 0601 or email: directsci@att.net
Model 451P Ion Chamber (Pressurized) SPECIFICATIONS
Radiation Detected: Gamma and X-rays above 25 keV
451P Operating Ranges
0-500 µR/h or 0-5 µSv/h
0-5 mR/h or 0-50 µSv/h
0-50 mR/h or 0-500 µSv/h
0-500 mR/h or 0-5 mSv/h
0-5 R/h or 0-50 mSv/h
Accuracy: Within 10% of reading between 10% and 100% of full scale indication on any range, exclusive of energy response. Calibration source is 137 Cs
Detector Chamber: 300 cc volume pressurized air ionization chamber to 6 atmospheres
Controls:ON/OFF and MODE
Automatic Features: Auto-zeroing, auto-ranging, and auto-backlight
451P Response Time: Analog response time from 10% to 90% of reading for a full scale step increase is dependent on operating range. Response time for a step increase in radiation exposure rate from background:
| Step increase, Step increase, background to | Time to reach 90% of final value (seconds) |
| 400 µR/h | 4.8 |
| 4 mR/h | 3.3 |
| 10 mR/h | 4.3 |
| 40 mR/h | 4.5 |
| 100 mR/h | 2.7 |
| 1 R/h | 2 |
| 4 R/h | 2.7 |
The following table shows time measured from 10% to 90% of final value for a step increase or decrease in exposure rate such that a range change does not occur. These values are the response times for the various ranges:
| Range 10% - 90% | (seconds) |
| 0-500 µR/h (5 µSv/h) | 5 |
| 0-5 mR/h (50 µSv/h) | 2 |
| 0-50 mR/h (500 µSv/h) | 1.8 |
| 0-500 mR/h (5 mSv/h) | 1.8 |
| 0-5 R/h (50 mSv/h) | 1.8 |
Power :Two 9-volt alkaline, 200 hours operation
Display:LCD analog/digital with backlight
Warm-Up Time Less than two minutes for initial operation when the instrument is in equilibrium with ambient temperature
Environmental:
Temperature Range: - 20°C to + 50°C
Relative Humidity:0 to 100%
Geotropism: Negligible
Typical Energy Dependence: Nitrogen gamma rays are 110% to 120% of indicated readings as determined at the University of Lowell
Dimensions: 4 in (w) x 8 in (d) x 6 in (h) (10 x 20 x 15 cm)
Weight:2 lb 6 oz (1.07 kg)
451P Models and Accesories:
Model 451P-RYR: 451P w/standard ion chamber
Model 451P-DE-SI-RYR 451P w/Dose Equivalent ion chamber
Options : Model 451EXL Excel add-in for Windows ® and RS-232 interface cable
Model 190HPS Single Unit Carrying Case
Model 190HPC Multiple Unit Carrying Case
Model 62-103137 Cs 10 µCi Check Source
Modes : Integrate mode perates 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
Waterproof Pelican Cases Available
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Direct Scientific tel (888) 368 9118 or (310) 589 0601 fax (310) 919-2981, Email |
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