Ludlum 2241-2RK w/44-9 Probe Meta The sensor on the 750

The sensor on the 750 module uses patented Doppler technology to directly measure average velocity in the flow stream

microprocessor based

These Controllers can also be operated manually

The new Pocket Colorimeter™ II Filter Photometer is a true go-anywhere instrument

Ludlum 2241-2RK w/44-9 Probe Meta The sensor on the 750The 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.