Ludlum Model 19 Radiation Monitor
Specification Sheet
Operation Manual
Ludlum Model 19 Radiation Monitor (microR/Ratemeter)  $67.50 $157.75 $450

The Ludlum Model 19 is a highly sensitive gamma µR/meter employing an internally housed, 2.5 cm diameter by 2.5 cm thick (1.0 x 1.0 in.) NaI detector. The measuring range is 0 to 50 µSv/h  (0–5000 µR/hr). 
The cast aluminum instrument housing with its separate battery compartment and accompanying metal handle offer an industrial robustness and quality that promote long lasting protection and instrument life.
The front-panel controls include a rotary switch for selecting the five-decade range and instrument shut-off, an audio on/off switch, a fast/slow response switch, and pushbuttons for activating the meter lamp, high-voltage display, battery test, and count reset. The Model 19 is a complete turn-key system and includes two "D" cell batteries.


  • High sensitivity to gamma
  • 0-50uSv/h (0-5000 uR/hr) Range
  • Rugged
  • Splash proof Protection for Outdoor Use
  • 2000-Hour Battery Life
  • Meter Light