451P Ion Chamber - used

  • Model: 451P-USED

Starting at: $1,580.00

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The (used) 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.

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:

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


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)

New 451P's and other ion chambers are available.

This product was added to our catalog on Thursday 28 September, 2017.


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