Ludlum model 2401-P is an analog compact and rugged Alpha, Beta, Gamma and X-Ray survey meter with a pancake built-in GM detector.

The Model 2401-P instrument is a general purpose, pocket-size radiation detection meter designed around the GM pancake detector. The detector is conveniently packaged inside the instrument with a protective screen window.

Applications:

This meter is great for measuring low-level surface contamination of beta emitting isotopes, or for locating dropped or lost (therapeutic) seeds in the Radiology or Nuclear Medicine departments.

Detector: Pancake GM with stainless steel protective screen (79% open)

Sensitivity (¹³⁷Cs gamma) Typically 3300 cpm per mR/hr

Efficiency:

¹⁴C: 5%
⁹⁰Sr/⁹⁰Y: 22%
⁹⁹Tc: 19%
^99mTc: < 1%
³²P: 32%
²³⁹Pu: 15%

Energy Response: Energy dependent

Battery Life: Typically 250 hours with alkaline battery (9V)

Weight: 0.4 kg (0.9 lb), including battery

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