Ludlum Measurements, Inc.  Ludlum Model 3030

   Alpha Beta Radiation Sample Counter




Ludlum Model 3030 Alpha/ Beta Radiation Sample Counter●  Fully Integrated Alpha/Beta Radiation Sample Counter

●  Simultaneous Alpha and Beta Counting

●  Utilizes ZnS(Ag) on Plastic Scintillation Detector

●  CPM and DPM Modes

●  Background Subtraction

●  Independent Readouts and Alarms

●  8 Hour Battery Operation

●  RS-232 Interface

●  Includes PC Software


The Ludlum Model 3030 Alpha/Beta Radiation Sample Counter incorporates an internally housed ZnS(Ag)/plastic scintillator detector with shielded 2 in. (5.1 cm) diameter stainless steel sample tray into Ludlum Model 3030 Scaler. This combined system supplies independent backlit LCD readouts to support discriminated alpha and beta sample counting. Key features include background subtraction, crosstalk correction, separate alpha/beta alarms, cpm/dpm operating modes, and pre-scripted QC function with automatic reminder timer. The instrument supports both 110 and 220 Vac operation, and includes a trickle charged gel-cell battery for portable offsite use for up to eight hours. A wide-range high voltage power supply supports virtually any detector. Status indicators located along the front panel inform the operator when another QC check is required, if the detector is non -functional, if it's operating in dpm or cpm mode, and if either an alpha or beta alarm setpoint has been exceeded. The count time is selected via a front-panel rotary switch that enables count times ranging from 0.1 to 60 minutes, or some other prescribed value as set up via a link to a PC. Other controls include a start count button, audio volume rotary adjustment, and instrument on/off switch. An RS-232 output from the rear panel supports connection to either a printer or PC. Included in the price is PC-control software, which is a Windows application that supports setup of the system, as well as collecting and logging all count results from the Model 3030.




PART NUMBER: 48-3204

APPLICATION: simultaneous alpha beta radiation sample counting
RADIATION DETECTOR: ZnS(Ag) adhered to plastic scintillation material
PHOTOMULTIPLIER TUBE: 2 in. (5.1 cm) diameter
WINDOW: 0.4 mg/cm2 aluminized mylar
ACTIVE and OPEN AREA: 20.3 cm2
SAMPLE HOLDER: brass housing with nickel plated brass sample tray capable of holding up to a 2 in. (5.1 cm) diameter sample

EFFICIENCY(4π): alpha: 32% - 230Th; 39% - 238U; 37% - 239Pu; beta: 8% - 14C; 27% - 99Tc; 27% - 137Cs; 26% - 90Sr/90Y

CROSS TALK: alpha to beta: 10% or less; beta to alpha: 1% or less

BACKGROUND: alpha: 3 cpm or less; beta gamma: typically 50 cpm or less (10 μR/hr field)

AUDIO: built in unimorph-type speaker with volume control to provide a dual tone click-per-event audio

backlit indicators for daily QC check needed (QC)

overload condition (OL)

counting in cpm or dpm mode (CPM/DPM)

count has exceeded alpha alarm set point (αAL)

count has exceeded beta alarm set point (βAL)

SCALERS: two each six-digit LCD displays with backlights providing a range of 0-999999 counts
SCALER LINEARITY: reading within 2% of true value
COUNT TIMER SETTINGS: .1, .5, 1, 2, 5, 10, and 60 minutes. PC position facilitates other user-defined values set by software program.
HIGH VOLTAGE: adjustable from 200-2500 Vdc
THRESHOLDS: alpha: -120 mV; beta: -4 mV; beta window: 50 mV

DATA-OUTPUT: 9 pin RS-232 port
POWER: 250 watts at 95–250 Vac, 50–60 Hz single phase; internal 12 Vdc, 1.2A/hr, trickle charged battery will provides power up to eight hours.
CONSTRUCTION: aluminum housing with gray powder coat paint and sub-surface printed front panel
TEMPERATURE RANGE: -4 to 122 °F (-20 to 50 °C)
SIZE: 11.5 x 7.5 x 10.5 in.
(29.2 x 19.1 x 26.7 cm) (H x W x D)
WEIGHT: approximately 29 lb (13.2 kg)
SOFTWARE: computer based to perform setup and calibration routines including: background subtract, crosstalk correction, cpm/dpm modes, daily QC check parameters, alarm levels, and automatic plateaus

All parameters are stored in the instrument in non-volatile memory. The supplied software is capable of logging and storing the following: Sample Number, Sample Date, Sample Time, Alpha Count, Beta Count, Sample Type, Comments.



 Options & Accessories


Ludlum Sample Planchets




Part Number


Eckert & Ziegler Sources

Sample Planchets




 Technical Information


Data Sheet

Product Manual

CE Certificate

PC Software

Gasless Alpha/Beta Sample Counter Comparison Chart

Eckert & Ziegler Recommended Sources


 Ludlum Resources


About Ludlum

Product Catalogs & Price Lists

Standard & Extended Warranty

Software Downloads

Replacement Parts

Repair & Calibration