Ludlum Model 2929 with Model 43-10-1 Alpha/Beta Sample Counter
Price range: $45.00 through $700.00
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 mete. 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 phoswich 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.
Please Note: Radiation equipment rentals require a minimum 3-week lead time to ensure availability
| Daily | Weekly | Monthly |
| $45 | $200 | $700 |
- Dual channel alpha beta sample counter
- Independent readouts
- 0.1 to 990 minutes scaler range
- Independent RS-232 outputs
- Accommodates up to 5.1 cm (2 in.) diameter samples
- INDICATED USE: alpha beta sample counting
- DETECTOR TYPE: scintillator: ZnS (Ag) adhered to plastic scintillation disk
- EFFICIENCY: 37% for 239Pu; 32% for 230Th; 39% for 238U; 5% for 14C; 27% for 99Tc; 29% for 137Cs; 26% for 99Sr/90Y
- PHOTOMULTIPLIER TUBE: 5.1 cm (2 in.) diameter, 10-pin dynode structure
- WINDOW: 0.4 mg/cm²
- OPERATING VOLTAGE: 500 to 1200 volts
- HIGH VOLTAGE: adjustable from 200-2500 volts
- THRESHOLDS: beta: 4 mV; alpha: 175 mV
- BETA WINDOW: 50 mV
- SCALERS: 2 ea. 6-digit LED displays with a range of 0–999999 counts
- SCALER LINEARITY: reading within 2% of true value
- BACKGROUND: 3 cpm or less for alpha; 80 cpm for beta
- TIMER: thumb-wheel adjustment from 0-99 minutes with selectable multipliers of x0.1, x1, x10, or EXT for manual timing
- DATA-OUTPUT: two 15-pin connectors allowing for recorder and printers (one for alpha, one for beta)
- AUDIO: built-in unimorph type speakers with volume controls provide a dual tone (1 per channel) click-per-event audio
- AMP OUT: “BNC” connector provides amplified detector pulse
- METER DIAL: 0 to 2.5 kV
- METER: 6.4 cm (2.5 in.) arc, 1 mA movement analog type
- POWER: 95 to 250 VAC wall transformer with 24 VDC output, 50 – 60 Hz single phase (typically less than 100 mA)
- SAMPLE HOLDER: brass housing with nickel plated brass sample tray capable of holding a 2.5 cm (1 in.) or 5.1 cm (2 in.) diameter sample up to 1.02 cm (0.4 in.) thick
- SIZE: 23.6 x 11.4 x 23.6 cm (9.3 x 4.5 x 9.3 in.) (H x W x L)
- WEIGHT: 1.9 kg (4.1 lb)