Ludlum Model 3-97 Gamma Survey MeterFeatures Wide Range from R hr to 200 mR hr High Sensitivity Gamma Rugged 4 Range Analog Ratemeter 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 2. 5 x 2. 5 cm (1 x 1 in.) NaI detector that is highly sensitive to gamma, with readings in the R range between 0

It is a four-digit number normally displayed on the LCD display

Processor: 386S X 33 motherboard with 4 MB RAM

(Actual unit in photo gallery)

The Ludlum Model 44-9 Alpha Beta Gamma Radiation GM pancake type detector is arguably the most popular radiation detector used throughout the world

A built-in calibration routine permits calibration of the instrument and displays the results

They don't require batteries to function and will last for decades

and Bicron

See the photos

Sr/Y-90: 37%

checks for alarms and responds to user commands

All you need to connect the counts

response setting