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Datasheet generated 2026-10-07
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Fluke 481 Radiation Detection Meter

Fluke · Safety & Detection · Tools · USA · fluke.com
Part Number
4022247
Fluke 481 Radiation Detection Meter

The Fluke 481 is a portable and practical means for identifying irradiated goods, and for helping remediate contamination and safety issues while minimally impacting operations.

Technical Specifications

Manufacturer part number (MPN)4022247
BrandFluke
CategoryTools
Radiation DetectedBeta > 100 keV
Operating Ranges0 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)
AccuracyWithin 10% of readings between 10% and 100% of full scale indication on any range, exclusive of energy response
DetectorChamber (cc volume air ionization) 349 cc
Automatic FeaturesAuto-zeroing, auto-ranging, and auto-backlight
Power RequirementsTwo 9 V alkaline, 200 hours operation
Warm-up TimeOne minute
Battery LifeFour+ hours continuous use per battery pack (assumes 50% brightness of LCD)
Dimensions (W x D x H)10 x 20 x 15 cm (4 x 8 x 6 in)
Weight1.11 kg (2.5 lb)
Analog100 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
Digital2.5 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 (0.25 in) high. Low battery and freeze indicators are also provided on the display
Integrate ModeOperates 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 ModeWill 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
Temperature Range-4°F to 122°F
Relative Humidity0% to 100% (at 140°F)
Geotropism< 1%

Properties

MOQ1

Cross-References

Attached Documents