Model TBM-3S and TBM-3SR PANCAKE GM SURVEY METER - order online

Radiation detection/civil defense, for emergency response personnel, in the event of a nuclear crisis.

TBM-3SR with beta slide window

 The total weight of this superb alpha-beta-gamma  survey meter with its internal standard pancake GM detector and 200 hour plus 9 volt battery is only 22 ounces. The three LINEAR ranges are: 0-500, 5000, and 50,000 cpm and 0-0.15, 1.5 and 15 mR/hr. The anti saturation circuit has been designed and tested to 100 R/hr.  Thousands are in use around the world. Cited by the National Institute of Standards and Technology, SP 981, for Fire Department use and emergency response personnel.

 The total weight of this superb alpha-beta-gamma  survey meter with its internal standard pancake GM detector and 200 hour plus 9 volt battery is only 22 ounces. The three LINEAR ranges are: 0-500, 5000, and 50,000 cpm and 0-0.15, 1.5 and 15 mR/hr. The anti saturation circuit has been designed and tested to 100 R/hr.  Thousands are in use around the world. Cited by the National Institute of Standards and Technology, SP 981, for Fire Department use and emergency response personnel.

SPECIFICATIONS:
 Meter:
TBM-3 Survey Meter: 2-1/2'' Rectangular.
TBM-3S & TBM-3SR Survey Meters: 2-1/2'' Ruggedized.

• Ranges: 3 ranges, linear: 0-500; 0-5,000; 0-50,000 cpm (0-;15; 1.5; 15 mR/h).*
• Switch Positions: Off, Battery Test, X100, X10, X1.
• Audio:
  TBM-3: internally mounted speaker.
  TBM-3S & TBM-3SR: sonalert with volume control.
• Detector: T-1190 ``pancake GM tube''
• Diameter: 2''; 5cm
• Window Diameter: 1-3/4''; 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 137).
• Physical dimensions:
  3'' Wide x 5-1/4'' Long x 2-1/4'' High. Excluding meter 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 anodized aluminum.
  (Optional Detachable Handle TBM-3SR(DL) Upon Request)
• Weight: 22 oz; 625 grams.