FLUKE Fluke 481 Radiation Detection Meter (Beta, Gamma)

General Specifications

Radiation Detected: Beta > 100 kev, Gamma > 7 keV

Operating Ranges: 

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

Battery Life: Four+ 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)

Weight: 1.11 kg (2.5 lb)

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%