Ludlum Model 3, Older version, C Connection Flir Other front-panel controls include a

Other front-panel controls include a rotary switch for selecting the four-decade range

diagnostic dose studies including CT

cpm/mR/hr Probe dependent LINEARITY

and sample number

we do not differentiate between UD-802

Ludlum Model 3, Older version, C Connection Flir Other front-panel controls include aThis unit is the older version of model 3 with a C connection. The Ludlum Model 3 Survey Meter is an extremely versatile meter, that with proper care, will last decades. It is an industry standard radiation meter used today at nuclear stations, universities, and medical centers. Why pay double for what you can get here at half price! It operates on two "D" cells for approximately 2000 hours. The Ludlum Model 3 has adjustable high voltage to 1500 volts