Model 2401-P

The Model 2401-P Dose instrument is a general purpose, self-contained, pocket-sized radiation detection meter designed around the venerable GM pancake detector. A simple switch allows the user to choose among the three decade ranges. Another switch selects between QUIET (click-per-event audio off), NORMAL, BAT CHECK, or OFF. The detector is conveniently packaged inside the instrument, and has a protective screen window. A convenient L-shaped stainless steel handle provides a secure and comfortable grip when using the Model 2401-P as a survey meter. Loosening the knob permits the handle to pivot, allowing the instrument to be easily housed in the included carrying and storage case.

Sliding Dose Equivalent Filter

As many know, the venerable GM pancake has a significant over-response at lower energies between approximately 20 to 160 keV (see red line on graph below). Any dose measurements taken with an unfiltered GM pancake detector would thus have unacceptable errors at these lower energies. To counteract this tendency, a sliding filter is located on the backside of the instrument which can be positioned in view of the GM pancake detector to flatten the response to within 20% referenced to ¹³⁷Cs (662 keV) over an energy range of 20 keV to 1.2 MeV.

Features

Self-contained Survey Instrument
Integrated GM Pancake Detector
Sliding Dose Equivalent Filter
Convenient Handle Pivots for Storage
Water, Dust, & Crush Resistant Case
Simple to Use
Low Cost

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Model 2401-EC2

Pocket-Size Survey Meter

Integrated Meter with Energy-Compensated GM Detector
Simple to Use
Low Cost

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Model 2401-P

Dose Pancake GM Pocket-Size Survey Meter with Dose Filter

Alpha-Beta-Gamma Survey
3-Range Analog Meter
Internal Pancake GM Detector
Sensitivity (¹³⁷Cs): 3300 cpm per mR/hr
Range: Meter Face Dependent

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Model 2401-P Pancake GM Pocket-Size Survey Meter

The Model 2401-P instrument is a general purpose, pocket-size radiation detection meter designed around the venerable GM pancake detector. The detector is conveniently packaged inside the instrument with a protective screen window. This instrument is available with a variety of meter faces for measuring contamination and exposure rate in either R or Sv units (see list on the Meter Faces tab).