Fluke 481 Data Sheet

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Fluke 481

Radiation Survey Meter

The Fluke 481 Radiation Survey Meter

is a portable and practical means

for identifying irradiated goods, and

for helping remediate contamination

and safety issues while minimally

impacting operations.

Use of the device reassures employees that

radiation risks are known, monitored and measured

for their protection. If radiation is found, a clear

and quantifiable result allows managers to comply

with federal guidelines, without overreacting with

unnecessary steps that might halt operations, impact

productivity or lead to lost revenue.

Features Include:

• Detects skin-dose (beta particle) and deep-dose (gamma)

and X-ray radiation

• Requires no adjustments; simple two button operation

• Delivers quickly read, correct value through autoranging capability

• Easily visible inside truck trailers and other low-light conditions

with automated backlight

• Works reliably indoors or outdoors thanks to sealed case

• 30 % more accurate than other available meters

• Delivers more than one week of continuous operation from 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

• Useful for contamination-detection, general radiation area surveys,

radiation-level monitoring, and hazardous materials assessment

• Ruggedized Fluke design

Technical Data

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 (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

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

(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)

10 cm x 20 cm x 15 cm (4 in x 8 in x 6 in)

Weight

1.11 kg (2.5 lb)

Fluke 481 Radiation Survey Meter

Detector

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

2 Fluke Corporation Fluke 481 Radiation Survey Meter

Fluke Corporation

PO Box 9090, Everett, WA 98206 U.S.A.

Fluke Europe B.V.

PO Box 1186, 5602 BD

Eindhoven, The Netherlands

For more information call:

In the U.S.A. (800) 443-5853 or

Fax (425) 446-5116

In Europe/M-East/Africa +31 (0) 40 2675 200 or

Fax +31 (0) 40 2675 222

In Canada (800)-36-FLUKE or

Fax (905) 890-6866

From other countries +1 (425) 446-5500 or

Fax +1 (425) 446-5116

Web access: http://www.fluke.com

©2011 Fluke Corporation.

Specifications subject to change without notice.

Printed in U.S.A. 4/2011 4022637A D-EN

Modification of this document is not permitted

without written permission from Fluke Corporation.

Fluke. Keeping your world

up and running.®

Specifications