Fluke 481 Portable Radiation Survey/Detection Meter

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 federal regulations.

Use of the Fluke 481 Radiation Survey Meter 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 federal guidelines while avoiding unnecessary steps that could stop procedures, impact productivity or lead to missed revenue. A clear and quantifiable result from the Fluke 481 Radiation Detection Meter allows managers to comply with federal guidelines, without overreacting with unnecessary steps that might halt operations, impact productivity or lead to lost revenue.

The Fluke-481 Radiation Survey/Detection Meter is ideal for detecting irradiated goods, equipment, surfaces or environments in industrial settings, for ensuring worker safety and complying with federal regulations.

  • Target Applications
    • Food processing or packaging screening
    • Transportation goods screening
    • Manufactured goods imported from Asia
    • Ports
    • First Responders (Police/Fire)
  • Target Customers:
    • Plant supervisors
    • Government (Health, Etc)
    • Port Authorities
    • QA safety director
    • Safety manager
    • Environmental Health and Safety Manager (EHS)
Fluke 481 Radiation Survey Meter Specifications
Detector Type Ion chamber
End users
  • X-ray manufacturers
  • State inspectors
  • Government agencies
  • Police and fire departments
  • Emergency response and hazmat teams
  • Nuclear medicine labs
  • Hospital radiation safety officers
  • Nuclear power workers
Radiation detected beta, x-ray, gamma
Electrical Specifications
Radiation detected Beta > 100 keV
Gamma > 7 keV
Operating ranges,
response time
  • 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)
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
246 mg/cm2
Chamber window
6.6 mg/cm2
Beta slide 440 mg/cm2
General Specifications
Automatic features Auto-zeroing, auto-ranging, and auto-backlight
Power requirements Two 9 V alkaline, 200 hours operation
Warm-up time One minute
Display LCD
w/ 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 (0.25 in) 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 -4 °F to 122 °F
Relative humidity 0 % to 100 % (at 140 °F)
Geotropism < 1 %
Dimensions (W x D x H) 4"  x 8" x 6" inches (10 x 20 x 15 cm)
Weight 2.5 lb (1.11 kg)


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