Qal-Tek Associates

Model Digilert200 - Radiation Monitor

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This instrument is an excellent, easy to use, general purpose radiation detector for a wide array of applications. It employs an end window GM tube that provides alpha, beta, and gamma sensitivity. Several of its neat features are its ability to download measurement data from the internal memory to a PC, set computer alarms, and calibrate with the free Observer USB Software.

  • Low Cost
  • 0-214,000 CPM
  • 0.001 to 200 mR/hr
  • Digital Numeric Display
  • End Window GM Detector
  • Integration & Timer Functions
  • User Programmable Alarms

  • Detector: Halogen-quenched GM tube with thin mica end window. Mica window density 1.5-2.0 mg/cm2. Effective window diameter is .360 inch. Side wall is .012 inch thick.
  • Operating Range:
    • mR/hr - .001 (1 µR) to 200 mR/hr
    • µSv/hr - .01 to 2000
    • CPM - 0 to 214,000
    • CPS - 0 to 3575
    • Total Counts - 1 to 9,999,000 counts
  • Accuracy: Typically ±15 % from factory. , ±10 % (NIST).
  • Energy Sensitivity:
    • 1070 CPM/mR/hr referenced to Cs137
    • Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%.
    • Detects beta at 50 keV with typical 35% detection efficiency.
    • Detects beta at 150 keV with typical 75% detection efficiency.
    • Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case.
  • Anti-Saturation: Readout will OVERRANGE in radiation fields as high as 100 times the maximum reading.
  • Alert: Pulsating beeper sounds the alert. Adjustable alert levels are used for mR/hr / CPM, and µSv/hr / CPS. Alarm will sound when in Timer Mode when set alarm threshold is reached.
  • Display: Backlit 4-digit liquid crystal display with mode indicators. Display updates every 3 seconds.
  • Count Light: Red LED flashes with each count.
  • Audio Indicator: Sounds with each count (can be switched off for silent operation)
  • Outputs: Dual miniature jack sends counts to CMOS- compatible devices, including computers, data loggers, and educational data collection systems. USB for use with Observer USB Software for PCs
  • Power Requirements: One 9-volt alkaline battery. Battery life is approx. 2000 hours at normal background radiation levels.
  • Temperature Range: 14° to 122°F
  • Weight: 7.7 oz.
  • Size: 6.1 x 3.1 x 1.2 in.

  • Xtreme Boot
  • Stand

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