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481 Radiation Detection Meter
Fluke 481
Ordering Information
Fluke 481
Ion Chamber Survey Meter
Fluke 481-DESI DESI Ion Chamber Survey Meter,
dose equivalent SI
190HPS
Single Unit Carrying Case
The Fluke 481 Radiation Detection Meter
is a portable and practical means for
discovering irradiated goods, and for
helping remediate contaminant and
safety issues while minimally affecting
performances. Ideal for detecting
irradiated goods, equipment, surfaces
or environments in industrial settings,
the 481 Radiation Meter helps ascertain
worker safety and compliance to national
regulations.
Use of the Fluke 481 assures employees
that radiation dangers are known,
monitored and calculated for their
security. Whenever radiation is found,
a clear and quantifiable result provides
handlers to comply with national
guidelines while avoiding unnecessary
steps that could stop procedures, impact
productivity or lead to missed revenue.
• Detects skin-dose (beta particle)
and deep-dose (gamma) and X-ray
radioactivity
• Requires no adjustments; simple two
button process
• Provides promptly read, correct value
through autoranging capability
• Easily visible inside truck trailers
and other low-light situations with
automated backlight
• Works dependably inside or outside
thanks to sealed case
• 30 % more precise than other available
meters
• Delivers more than one week of
uninterrupted functioning with two
9-volt alkaline batteries
• Proven in use by state and local
governmental emergency response
professionals, state inspectors,
HAZMAT teams and nuclear power
workers
• Measures both dose and dose-rate
• Valuable for contamination-detection,
general radiation area metering,
radiation-level monitoring, and
hazardous materials assessment
• Rugged Fluke design
Fluke 481 Radiation Detection Meter
General specifications
Fluke 481
Fluke 481-DESI
Radiation detected
Beta > 100 keV
Gamma > 7 keV
Operating ranges
0 mR/h to 5 mR/h (8 sec)
0 mR/h to 50 mR/h (2.5 sec)
0 mR/h to 500 mR/h (2 sec)
0 R/h to 5 R/h (2 sec)
0 R/h to 50 R/h (2 sec)
0 μSv/h to 50 μSv/h (8 sec)
0 μSv/h to 500 μSv/h (2,5 sec)
0 mSv/h to 5 mSv/h (2 sec)
0 mSv/h to 50 mSv/h (2 sec)
0 mSv/h to 500 mSv/h (2 sec)
Accuracy
Within 10 % of readings between 10 % and 100 % of full scale indication on any
range, exclusive of energy response
Detector
Chamber (cc volume air ionization) 349 cc
Chamber wall (phenolic) 246 mg/cm2
Chamber window (mylar) 6.6 mg/cm2
Beta slide 440 mg/cm2
Automatic features
Auto-zeroing, auto-ranging, and auto-backlight
Power requirements
Two 9 V alkaline, 200 hours operation
Warm-up time
One minute
Battery life
Four+ hours continuous use per battery pack
(assumes 50 % brightness of LCD)
Dimensions (W x D x H)
10 cm x 20 cm x 15 cm
Weight
1.11 kg
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 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 6.4 mm high. Low battery and freeze
indicators are also provided on the display
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
Environmental
Temperature range
-20 °C to 50 °C
Relative humidity
0 % to 100 % (at 50 °C)
Geotropism
< 1 %
Specifications
Fluke 481