Fluke 481 Radiation Survey Meter Technical Data 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 designFluke 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 Specifications Radiation detected Beta > 100 keV Gamma > 7 keV Operating ranges, 0 mR/h to 5 mR/h (8 sec) response time 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 349 cc ionization) 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 100 element bar graph 6.4 cm long. Bar analog/digital graph is divided into 5 major segments, with backlight 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 Fluke. Keeping your world units of measurement are indicated on up and running. the display at all times. Digits are 6.4 mm (0.25 in) high. Low battery and freeze Fluke Corporation indicators are also provided on the display PO Box 9090, Everett, WA 98206 U.S.A. Modes Integrate mode Operates continuously 30 seconds after Fluke Europe B.V. the instrument has been turned on. PO Box 1186, 5602 BD Integration is performed even if the Eindhoven, The Netherlands instrument is displaying in mR/h or R/h For more information call: In the U.S.A. (800) 443-5853 or Freeze mode Will place a tick mark on the bar graph Fax (425) 446-5116 display to hold on the peak displayed In Europe/M-East/Africa +31 (0) 40 2675 200 or value. The unit will continue to read and Fax +31 (0) 40 2675 222 display current radiation values In Canada (800)-36-FLUKE or Fax (905) 890-6866 Environmental Temperature range -4 F to 122 F From other countries +1 (425) 446-5500 or Relative humidity 0 % to 100 % (at 140 F) Fax +1 (425) 446-5116 Web access: