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Fluke 481
Catalog #: 4022247
Ion Chamber Survey Meter
- Overview
- Specifications
- Summary
- Cases
Product Highlights
- 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
| 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
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| Radiation detected |
beta, x-ray, gamma |
| 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) |
| Operating ranges, response time |
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) |
| Data Logging |
No |
| Unique Features |
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 |
| Warranty |
1 YEARS |
| Calibration Included |
Factory Calibration |
| Power Supply Voltage |
Battery Powered |
| Interfaces I/O |
Analog Output, Other, RS-232, Analog Input |
| Product Weight |
2.5 LBS |
| Battery Type |
9v |
| Product Height |
4 IN |
| Product Length |
8 IN |
| Product Width |
6 IN |
| Shipping Weight |
4.00 LBS |
| ECCN Number |
1A999 |
| HTS/Schedule B Number |
9030.10.0000 |
| Country of Origin |
United States |
| Shipping Height |
8.82 IN |
| Shipping Length |
9.25 IN |
| Shipping Width |
4.65 IN |
| UPC |
095969600934 |
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