AJAX Environmental & Safety Supply, Inc 2010

The Model 3-97 provides a great solution for locating potential contamination and then accurately measuring the exposure rate or for simply measuring the ambient exposure levels over a wide range. The instrument is equipped with an internal 1" x 1" NaI detector that is highly sensitive to gamma with readings in the uR range between 0 - 3000 uR/hr (0 - 3 mR/hr). The instrument is additionally equipped with an external Model 44-38 energy compensated GM to extend the detection range up to 200 mR/hr. The ratemeter is Ludlum's venerable Model 3 -series which employs a robust aluminum cast instrument housing with a separate battery compartment for long lasting protection and instrument life. The front panel controls include a rotary switch for selecting the 4 decade range, instrument shut off and battery test, an audio on/off switch, a fast/slow response switch, a count reset button and internal/external detector switch. The Model 3-97 is a complete turn key system and comes with the detector cable and two "D"cell batteries.

The Model 44-9's GM pancake type detector is arguably the most popular radiation detector used throughout the world.  This detector is sensitive to alpha, beta and gamma radiation, is enclosed within a rugged metal enclosure, and is conveniently shaped and sized for checking contamination on people and objects. This detector operates between 85 to 1000 volts and is compatible with any Ludlum instrument capable of supplying 900 VDC and an input sensitivity of 30 mV or higher.