GM Survey Meters: Contamination & Exposure

End Window GM
 Model 2401-EW CE_Label
M2401-ew

The Model 2401-EW instrument is a general purpose, pocket size radiation detection meter that employs an end-window type GM detector.  The detector is conveniently packaged inside the instrument, with a protective screen covering located along the middle of the top end of the instrument.  The meter presents two scales: CPM for contamination measurements, and mR/hr for exposure rate.

  • Detector sensitivity: 1050 cpm/mR/hr

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Internal Pancake GM
 Model 2401-P CE_Label
M2401-P

This pocket-size instrument is a general purpose radiation detection meter designed around the venerable GM pancake detector.  The detector is conveniently packaged inside the instrument with a protective screen window located on the backside of the instrument. 

  • Detector sensitivity: 3300 cpm/mR/hr
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Integrated Instrument
 Model 26 CE_Label
M26-Rt-Profile

This unique instrument integrates the detector, electronics and batteries all into a versatile and ergonomic solution.  Based on the popular 15 cm2 GM pancake detector, this all in-one probe produces an audio ouptut, has programmable alarms and can even do scaler counts!  With up to 1000 hours of battery life, this economical unit is hard to beat. 

  • Detector sensitivity: 3300 cpm/mR/hr
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External Pancake GM
 Model 3 Ratemeter with Model 44-9 GM Pancake Detector CE_Label
M3_w_44-9

This is Ludlum’s best-selling Model 3 analog ratemeter, in combination with the industry-standard Model 44-9 GM pancake detector that delivers a universal and very robust radiation counting system.  The meter and probe body are constructed from cast and formed metal that withstand rugged daily use.   A separate, front accessible compartment facilitates changing batteries after 2000 hours of operation.

  • Detector sensitivity: 3300 cpm/mR/hr

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Contamination Frisker Station
 Model 177 Frisker with Model 44-9 GM Pancake Detector CE_Label
M177-w-M44-9i

The Model 177 is a rugged benchtop ratemeter with alarming capability. These units are very popular for frisking operations at stations where line power is available but can also be used in portable applications for up to 50 hours using the internal rechargeable battery.

The Model 177 supports the Model 44-9 GM pancake detector and displays the results on a linear readout analog meter. The audio alarm is adjustable from 0 through 150% of full scale and is factory set to latching. Re-configuration to non-latching can be accommodated via a minor internal change.

  • Detector sensitivity: 3300 cpm/mR/hr

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