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Fluke Model 451 B
Ion Chamber Survey Meter with Beta Slide
The Model 451B state-of-the-art ion chamber survey meter 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 45 1B employs microprocessor and LCD technology and features a rugged ionization chamber with a mylar window and protective steel mesh. An integral 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 ‘ Freeze indicates peak reading 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. The Model 451B is ideal for site surveys and a wide range of medical and health physics applications. It is regularly used by Police and Fire Departments, X-ray manufacturers, government agencies, state inspectors, emergency response and HAZMAT teams, nuclear medicine labs, hospital radiation safety officers, and nuclear power industry.
- 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
- Ergonomic, anti-fatigue handle with replaceable grip and wrist strap
- Sliding shield for alpha and beta discrimination
- Low noise chamber bias supply for fast background settling time
- Easy touch keys
- Ideal for a wide range of applications including NDT, X-ray, and environmental
- Battery operated
- RS-232 communications interface
- Measures rate and dose simultaneously
- Tripod mount for stationary, area monitor applications
- Freeze mode indicates peak reading
- Programmable flashing display and audible alarm
- Automatic, ultra-bright LCD display
- Excel add-in for Window
® (optional)- Real-time data logging
- Downloading of 2700 data sets stored in instrument
- Virtual instrument display with audible and visual alarm indication
- Supports user instrument configuration and parameter selection
- User selectable modes
SPECIFICATIONS:
Radiation Detected
Alpha above 4 MeV
Beta above 100 keV
Gamma above 7 keVOperating Ranges
Accuracy
Within 10% of reading between 10% and 100% of full scale indication on any range, exclusive of energy response. Calibration source is 137CsDetector
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/cm2Controls: ON/OFF and MODE
Automatic Features: Auto-zeroing, auto-ranging, and auto-backlight
Response Time
Typical Energy Dependence
Power Two 9-volt alkaline, 200 hours operation
Display 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 instrumentDigital
2 1/2 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 114 in (6.4 mm) high. Low battery and freeze indicators are also provided on the display
Warm-up Time One minute
Environmental
Temperature Range - 40°C to + 70°C
Relative Humidity 0 to 100%, @ + 60°C
Geotropism Less than 1%Dimensions 4 in (w) x 8 in (d) x 6 in (h) (10 x 20 x 15 cm)
Weight 2 lb 7 oz (1.11 kg)451 B Models
Model 451B-RYR 45 1B w/standard chamber
Model 451B-DE-SI-RYR 451 B w1Dose Equivalent chamberOptions
Model 451EXL Excel add-in software and RS-232 interface cable
Model 190HPS Single unit carrying case
Model 450UCS 238Uranium .064 μC check source, impregnated 2 in x 2 in yellow cardModes
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
Fluke Model 451 P
Pressurized μR Ion Chamber Survey Meter
The Model 451P state-of-the-art ion chamber survey meter is a hand-held battery operated unit designed for use in both rugged and normal environments. The Model 451P features a pressurized ionization chamber, providing enhanced sensitivity and improving energy response to measure gamma and X-ray radiation.
The Model 451P employs microprocessor and LCD technology. 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 ‘ RS - 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.
APPLICATIONS
The Model 451P is used in a wide range of medical and health physics applications. The Model 451P 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, government agencies, state inspectors, research labs, biomedical technicians, and in airports for baggage inspection equipment maintenance.
High sensitivity μR 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 Low/noise chamber bias supply for fast background reading Easy touch keys FEATURES
- Ideal for a wide range of applications including NDT, X-ray, and environmental
- Battery operated
- Auto-ranging and auto-zeroing
- RS-232 communications interface
- Measures rate and dose simultaneously
- Tripod mount for stationary, area monitor applications
- Freeze mode indicates peak reading
- Programmable flashing display
- Automatic, ultra-bright LCD display
- Separate integrate mode
- Excel add-in for Window® (optional)
- Real-time data logging
- Downloading of 2700 data sets stored in instrument
- Virtual instrument display with audible and visual alarm indication
- Supports user instrument configuration and parameter selection
- User selectable modes
SPECIFICATIONS
Radiation Detected
Beta above 1 MeV
Gamma and X-rays above 25 keVOperating Ranges
Accuracy
Within 10% of reading between 10% and 100% of full scale indication on any range, exclusive of energy response. Calibration source is 137CsDetector
Chamber: 300 cc volume pressurized air ionization chamber to 6 atmospheresControls ON/OFF and MODE
Automatic Features
Auto-zeroing, auto-ranging, and auto-backlightResponse 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:
Power Two 9-volt alkaline, 200 hours operation
Display LCD analog/digital with backlight
Analog 100 element bar graph 2.5 in (6.4 cm) long. Bar graph is divided into five major segments, each labeled with the appropriate value for the range of the instrument.
Digital 2 1/2 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 1-1/4 in (6.4 mm) high. Low battery and freeze indicators are also provided on the display
Warm-up Time Less than two minutes for initial operation when the instrument is in equilibrium with ambient temperature
Typical Energy Dependence
I6
Nitrogen gamma rays are 110% to 120% of indicated readings as determined at the University of Lowell
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 valuesEnvironmental
Temperature Range - 20°C to + 50°C
Relative Humidity 0 to 100%
Geotropism NegligibleDimensions 4 in (w) 8 in (d) 6 in (h) (10 x 20 x 15 cm)
Weight 2 Ib 6 oz (1.07 kg)
451 P Models
Model 451P-RYR 451P w/standard chamber
Model 451P-DE-SI-RYR 451P w/Dose Equivalent chamberOptions
Model 451EXL Excel add-in for Windows® and RS-232 interface cable
Model 190HPS Single Unit Carrying Case
Model 62-103 137Cs10 μCi Check Source
Supertech ®
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Elkhart, IN 46515 USA
Sales: 800-654-1054
Phone: 574-264-4310
Fax: 574-264-9551
Email: sales@supertechx-ray.com
Support: support@supertechx-ray.com
