The Frisker is a probe-style Geiger counter customized for detecting radiation contamination, and designed to meet the demands of today’s first responder. By integrating the latest electronics with a proven and dependable Geiger-Mueller detector, the Frisker is a rugged, ergonomic tool that addresses a number of radiological applications.
Detector: Halogen-quenched GM tube with thin mica end window. Mica window density 1.5-2.0 mg/cm2. Effective diameter of window is 45 mm (1.77 in.). Side wall is .012 inch thick.
Operating Range: µR/hr - 1 to 50,000 CPM - 0.0 to 175,000 nSv/hr - 1 to 500,000 CPS - 0.0 to 2500
Accuracy: Typically ±15% from factory. , ±10% (NIST).
Energy Sensitivity: Detects Alpha down to 2 MeV. Detects Beta down to .16 MeV; typical detection efficiency at 1 MeV is approx. 25%. Detects Gamma down to 10 KeV through the detector window. 3600 CPM/mR/hr (137Cs). Smallest detectable level for 125I is .02 µCi at contact.
Anti-Saturation: Readout will OVERRANGE in radiation fields as high as 100 times the maximum reading.
Alert: Pulsating beeper sounds the alert. Adjustable alert levels are used for µR/hr / CPM, and nSv/hr / CPS.
Display: Backlit liquid crystal display with mode indicators.
Count Light: Red LED flashes with each count.
Audio Indicator: Sounds with each count (can be switched off for silent operation)
Power Requirements: Two (2) AA alkaline batteries. Battery life is approx. 200 hours at normal background radiation levels.
Temperature Range: -10° to +50°C (14° to 122°F)
Weight: 217 g (7.7 oz.)
Size: 276 x 44 x 64 mm (10.88 x 1.75 x 2.5 in.)
Includes: Carrying Case
Limited Warranty: 1 year
This item is in stock, and will typically ship out within 1 business day.
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I'm not a scientist, so I have no way of knowing exactly how precise or accurate it is. I bought it as a workplace risk assessment tool and it works for that. I haven't used it more than an hour so far, but it feels solid and I have a strong sense that it will hold up in my world which is far from a laboratory and the readings seem entirely plausible to me. The person I spoke to on the phone helped me boil down the myriad of ways (units) to measure radiation which was very helpful. John E. Randall, Fenceman on Jan 5th 2020