Frisker
Small three range Ratemeter with separable 2'' diameter pancake probe. Reads out in counts per minute ( and mR/hr). 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 with volume control 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.

Features
  • Light Weight
  • One Hand Operation
  • Detachable Pancake Probe
  • Built-In Sonalert with Volume Control
  • Anti-Saturation Circuit
Specifications
  • Meter: Ruggedized 2 1/2'' meter.
  • Ranges: 3 ranges, linear - 0-500; 0-5,000; 0-50,000; cpm (0-.15, 1.5, 15 mR/hr).
  • Switch Position: Off, Battery Test, X100, X10, X1.
  • Audio: Sonalert with volume control.
  • Detector: T-1190 2'' diameter (5cm) ``pancake GM'' tube. 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 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).
  • Calibration: Single master calibration pot as well as individual cal pots for each scale.
  • Power: 9 volt nominal ``transistor'' battery; Eveready 1222.
  • Weight: Electronics only: 22 oz.; 625 gm. Total: including separable pancake probe 34oz.; 0.97 kg.
  • Battery Life: 100 hours in normal operation.

Click for a larger view