• Ludlum Model 2929 with Model 43-10-1 Digital Dual Channel Scaler - Refurbished


  • $2,700.00 $5,774.00

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  • Description

    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.

    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.


    Specifications Model 2929

    INDICATED USE: scaler for alpha beta sample counting
    DETECTOR COMPATIBILITY: phoswich or proportional type detectors
    HIGH VOLTAGE: adjustable from 200-2500 volts
    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
    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 to provide a dual tone (1 per channel) click-per-event audio
    AMP OUT: “BNC” connector provides amplified detector pulse
    METER DIAL: 0-2.5 kV
    METER: 6.4 cm (2.5 in.) arc, 1 mA movement analog type
    POWER: 95-250 Vac, 50-60 Hz single phase
    SIZE:  24.4 x 37.1 x 25.1 cm (9.6 x 14.6 x 9.9 in.) (H x W x D)
    WEIGHT: 5.5 kg (12.1 lb) including detector
    Specifications 43-10-1

    INDICATED USE: alpha/beta sample counting
    DETECTOR TYPE: scintillator: ZnS (Ag) adhered to plastic scintillation disk
    PHOTOMULTIPLIER TUBE: 5.1 cm (2 in.)
    OPERATING VOLTAGE: 500 to 1200 volts
    WINDOW: 0.4 mg/cm²
    EFFICIENCY (4π): 37% for 239Pu; 32% for 230Th; 39% for 238U; 5% for 14C; 27% for 99Tc; 29% for 137Cs; 26% for 99Sr/90Y
    • alpha: 3 cpm or less
    • beta: 80 cpm
    SAMPLE HOLDER: anodized aluminum tray with sample ring to allow for 2.5 cm (1 in.) or 5.1 cm (2 in.) diameter samples
    SAMPLE SIZE (maximum): 5.1 x 0.9 cm (2 x 0.4 in.) (Dia x L)
    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)

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