Model # TBM-15D Digital Frisker / Survey meter

FEATURES:
 

• LIGHT WEIGHT
• ONE HAND OPERATION (ERGONOMIC PROBE HOLDER)
• NO RANGE SWITCHING
• DETACHABLE PANCAKE PROBE
• BUILT-IN SONALERT
• ANTI-SATURATION CIRCUIT

DESCRIPTION: Small Digital Ratemeter with separable 2'' diameter pancake probe. Reads out in mR/hr (Optional µ Sv/h or cpm, cps. Thin probe window is recessed and protected by sturdy stainless steel grill. Instrument will see alpha, beta and gamma radiation. Anti-saturation circuit will not fall below full scale in high fields. Tested to 100 R/hr. Sonalert gives audible rate indication.
 
APPLICATION: Its small size, light weight, separable probe 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.
See ``Beta Pancake Response'' specification (BETA PANCAKE RESPONSE)

SPECIFICATIONS:

• Read-out: Rugged 6 digit display.
• Ranges: 0.01 to 200 mR/hr, no range switching. (0-500,000 cpm)
• Linearity: +/- 15% of full scale with pulse generator.
• Battery Test: Push button.
• Audio: Sonalert.
• Two Time Constants: Fast & Slow (each is user programmable) 0 to 90% of final reading.
• Setable: 2 sec to 99 seconds.
• Detector:
  T-1190 2'' diameter (5cm) ``pancake GM'' tube. Plateaus:  150V <10% / 100V
  Window Diameter: 1 3/4''; 4.5 cm. Area 16 cm²
  Window Thickness: 1.5 mg/cm<sup>2</sup>.
  Quench Gas: Halogen for long life. Deadtime: 70 µ sec Max
  Background: Typical 50 cpm. Thin profile of tube (13mm)  gives low background.
  Efficiency: 100% for all betas and alphas that have sufficient  energy to penetrate the thin window.
• Physical Dimensions: 3''; 7.6 cm wide x 5 1/4'' W; 13.3 cm long x 2 1/4''; 6 cm thick (excluding probe, meter, and handle).
• Temperature: -10°c to +50°c when high quality batteries are used.
• Calibration: Single master calibration pot as well as programable calibration factor.
• Efficency: Beta C-14 > 6%, Sr-90/Y-90> 25%.
• Speaker: Built-in Audible Click for detector pulse, on-off Volume switch on panel.
• Pulse-count: Green LED.
• Alarm: Settable over entire instrument range.
• Warning: Red LED.
• Optional Serial Port: Allows real time data logging to portable PC.
• Power: 6 ``AA'' cells.
• Weight:
  Electronics only: 22 oz.; 625 gm.
  Total: including separable pancake probe 34oz.; 0.97 kg.
• Battery Life: 100 hours in normal operation (Greater with Li or NiMH Battery).