Alpha/Beta Sample Counter - Model 2929_with_43-10-1
CE Seal

This instrument combines Ludlum's Model 2929 Dual Channel Scaler with its Model 43-10-1 Sample Counting Head to create an alpha/beta sample counter. The Model 2929 is a dual-channel scaler incorporating a pulse height analyzer that provides alpha beta separation and displays the counts for each on dedicated six-digit LED readouts.
Each readout is accompanied by an audio volume rotary control. The high voltage is set via a fine 10-turn dial with the readout given on an analog meter. The scaler count time is set by a combination of thumbwheel and multiplier controls that allow setting the time from 0.1 to 990 minutes. The front panel additionally provides a start-count button, halt-count button, and an on/off power switch. A red count lamp is illuminated any time the instrument is performing a timed count. Independent RS-232 serial outputs are supplied for the alpha and beta channels on the back panel for supplying data to either a printer or PC.
The Model 43-10-1 sample counting head is a scintillator/zinc sulfide phoswitch with a sample tray accommodating up to a 5.1 cm (2 in.) diameter filter or planchet.  The system comes complete with interconnecting cable and with the detector/sample tray joined to the scaler instrument to facilitate portability.