Model # TBM-3SR-D Internal G-M Survey Meter - Digital display with Beta Slide

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Features  

• SENSITIVE TO ALPHA, BETA & GAMMA
• ONE HAND OPERATION
• DIGITAL DISPLAY
• BUILT-IN SPEAKER
• ANTI SATURATION CIRCUIT
• LARGE 2'' PANCAKE DETECTOR
• BETA SHIELD/WINDOW PROTECTION

DESCRIPTION: Small Digital Ratemeter with built -in 2'' diameter pancake tube and speaker. Meter displays reading in mR/hr or cpm (or counts per minute). The thin window recessed and protected by sturdy grill. Additionally TBM-3SR-D features a sliding methacrylate beta shield. This is a beta shield, but provides additional protection for thin G-M tube window. The TBM-3SR-D Survey Meter will detect alpha, beta, and gamma radiation. The anti-saturation circuit will not fall below full scale in high fields. Tested to100 R/h.

APPLICATION: Its small size, light weight, one hand operation, and large detector area make this a very useful monitor for surveying bench tops or checking hands, clothes, and fingertips for almost any radioactive contamination.This survey meter is ideal for fire department, police, emergency response, and U.S. Customs Personnel use for surveying people, cars, luggage, surface of rooms, accident scenes, etc...

TBM-3SR-D Digital Survey Meter (Shown With Sliding Beta Shield)

SPECIFICATIONS:
 

• Digital Display:
      Large 6 digit LCD Display.
      (Optional lighted LCD Display.)
• Ranges:
      0.01 to 100.00 mR/hr.
      (Optional: 0 to 100,000cpm.)
• Front Panel Switches:
      Power: On/Off.
      Battery Test.
• Detector: T-1190 ``pancake GM tube''
• Diameter: 2 inches (5cm).
• Window Diameter: 1-3/4 inches (4.5 cm).
• Window Thickness: 1.5 mg/cm<sup>2</sup>
• Quench Gas: Halogen for long life.
• Background: Typical <50 cpm. Thin Profile of tube (13mm) gives low background.
• Efficiency: 100% for all Betas and Alphas that have the energy to penetrate the thin window. Gamma sensitivity nominal is 3,500 cpm/mR/hr (based on Cs<sup>137</sup>).
• Physical dimensions: 3'' Wide x 5-1/4'' Long x 2-1/4'' High. Excluding knobs and handle.
  (7.6 cm x 13.3 cm x 6 cm)
• Beta Shield: Methacrylate 0.125'', 3.1 mm.
• Calibration: Single master calibration pot as well as individual cal pots for each range.
• Power: 9 volt ``transistor'' battery; Eveready 1222, or equivalent.
• Battery Life: 100 hours in normal operation.
• Handle:
      Swivel type, polished anodizedn aluminum.
      (Optional Detachable Handle TBM-3SR(DL) Upon Request)
• Weight: 22 oz. (625 grams).
• Optional:
  Lighted LCD Display.
  Detachable Handle TBM-3SR-D(DL). 
  
  Fire Fighters: TBM-3SR-D is available with the mR/hour Scale, a single Counts Per Minute Scale or mR/hr Scale, or Both Scales (Upon Request).