Ludlum 2241-2RK w/44-9 Probe Meta Adjustable over a range from

Adjustable over a range from 20 SCFM to 60 SCFM the air flow is controlled at constant standard conditions of 25 degrees C temperature and 760 mm Hg pressure within plus or minus 1 SCFM

These Controllers can also be operated manually

Operating Principles

and a color LCD display that can be viewed in all lighting conditions

Ludlum 2241-2RK w/44-9 Probe Meta Adjustable over a range fromThe Ludlum Model 2241 2RK is a portable general purpose survey meter equipped with a Geiger Mueller detector for measurement of alpha, beta and gamma radiation. The Model 2241 operated in either Ratemeter Mode with a moving decimal point and six digit in Scaler Mode. The unit has both visual and audible alarms.