Detector: Halogen-quenched Geiger-Mueller tube.  Effective diameter 1.75″ (45 mm). Mica window density 1.5-2.0 mg/cm².

Display: 4-digit liquid crystal display with mode indicators

Operating Range:

     mR/hr: .001 to 100.0
     CPM: 0 to 350,000
     Total: 1 to 9,999,000 counts
     µSv/hr: .01 to 1,000
     CPS: 0 to 5,000

Gamma Sensitivity: Readout holds at full scale in fields up to 100 times the maximum reading

Efficiency: For 4 pi geometry at contact

    Beta
      C-14 (49 keV avg. 156 keV max.): 5.3%
      Bi-210 (390 keV avg. 1.2 MeV max.): 32%
      Sr-90 (546 keV and 2.3 MeV): 38%
      P-32 (693 keV avg. 1.7 MeV max.): 33%
    Alpha
      Am-241 (5.5 MeV): 18%

Averaging Periods: Display updates every 3 seconds, showing the average for the past 30-second time period at normal levels.  The averaging period decreases as the radiation level increases. User can select a fast 3-second averaging period.

Timer: Can set 1-10 minute sampling periods in one-minute increments, 10-50 minute sampling periods in 10-minute increments, and 1-24 hour sampling periods in 1-hour increments

Alert: Beeper sounds the alert; User-adjustable alert level is set using three buttons

Accuracy: ± 15% up to 50 mR/hr; ± 20% up to 100 mR/hr

Anti-Saturation: Readout holds at full scale in fields up to 100 times the maximum reading

Temperature Range: -20º to +50º C , -4º to +122º F

Power: One 9V alkaline battery; average battery life is 2160 hours at normal background, average 625 hours at 1 mR/hr with beeper off

Dimensions: 5.9″ x 3.2″ x 1.2" (150 x 80 x 30 mm)

Weight: 11.4 oz (323 grams) including battery

I/O Ports: Dual miniature jack for CMOS or TTL devices, sending counts to computer or data logger. Submini jack for electronic calibration.

Count Light: Red LED flashes with each radiation event

Audio: Beeper beeps with each radiation event; can be muted

Options: Wipe Test Plate


Wipe Test Plate: $75.00 USD (+Shipping and Handling)