ABG Pancake Probe

The Radiological Detection System (RDS) ABG Pancake Probe is used for detecting alpha, beta, and gamma radiation. It is designed to be held in the operator’s hand for beta/gamma contamination monitoring work. The probe uses a Geiger-Mueller (GM) Pancake Tube to provide a 15.5 cm2 sensitive detection area in a small and lightweight probe. The unit is supplied with a Detector Protective Cover, a removable ‘clip-on’ thin shield for protecting the front face of the probe. An optional aluminum-clad lead shield is available for performing radiological detection operations in high background radiation areas.


Mission Personal Radiation Detection
Detector Type Geiger-Mueller Pancake Tube
Dose Rate Units Count Rate – cpm, cps. Count Rate per Unit Area – cpm/cm², cps/cm²
Detection Range Beta range – 100 keV – 5 MeV
Count Rate Range 0 – 1.5 Mcpm
Window 15.5 cm² mica, protected by stainless steel screen
Min. Detectable Concentration 100 Bq/cm²
Background (0.25 µSv/hr) 60 cpm with shield, 100 cpm without shield
Efficiency C-14 10%, Tc-99 15%, Sr-90 & Y-90 19% Ru/Rh-106 25%
Alarms Saved in Base Unit memory, ability to set
Display RDS Base Unit
Power Supplied by RDS Base Unit
Dimensions 5.4″ x 2.7″ x 4.7″
Weight 1 lb. (.45 kg)

Additional information

ABG Pancake Probe Features:

Small hand-held Geiger-Mueller Pancake Tube detector for alpha, beta, and gamma radiation

Part of the RDS radiation detecting probe family

Small, lightweight, and durable probe with a 15.5 cm2 sensitive detection area

Removable clip-on protective shield

Optional aluminum-clad lead shield

Durable, easy-to-use ergonomic design

Base Unit to probe connector cable can be used with any RDS probe

Hot-swapping Smart Probe Technology

Calibration resident on probe (does not require a paired Base Unit)

Robust cable connections

Data Exchange Console options

Designed and tested for military ruggedness to meet both military/defense requirements and industrial applications

As a smart probe, the ABG Pancake Probe contains a microprocessor and High Voltage circuitry for creating its own high voltage. No high voltage is transferred across the interface cable. When connected to the Base Unit, the display will show the probe’s image and radiation measurement. The probe’s onboard memory stores the probe type and calibration information.