Model TBM-3SR Internal Pancake with Beta Shield

  • Model: TBM-3S-R

$804.00

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The analog Model TBM-3SR Radiation Detector features an internal Pancake G-M, with Beta Slide Window. The unit is useful in civil defense and emergency response.

The total weight of this alpha-beta-gamma radiation detector with its internal standard pancake Geiger Mueller detector and 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 of this model are in use around the world. The TBM-3SR is cited by the National Institute of Standards and Technology, SP 981, for Fire Department use and emergency response personnel.

Specifications:

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: 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/cm2.
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.

This product was added to our catalog on Wednesday 12 July, 2017.

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