Ludlum Model 2224 Alpha/Beta Scaler / Ratemeter

PART #:48-2494

Ludlum Model 2224 Alpha/Beta Scaler / Ratemeter Specifcations:

INDICATED USE: Simultaneous alpha, beta counting and discrimination
COMPATIBLE DETECTORS: Proportional and dual phosphor scintillation detectors
CONNECTOR: Series "C" (others available)
AUDIO: Built in unimorph speaker with volume control (greater than 60 dB at 2 feet, full volume)
AUDIO DIVIDE: Selectable dual or individual click-per-event for alpha and beta counts and divisions of 1, 10, 100, or 1000 events-per-click (beta counts only)
METER: 2.5"(6.4cm) arc, 1 mA analog type
METER DIAL: 0 - 500 cpm, 0 - 2 kV, BAT OK, OL(overload)
MULTIPLIERS: X1, X10, X100, X1000
LINEARITY: Reading within plus or minus 10% of true value with detector connected
SCALER: 6 digit LCD display with 0.25"(0.64cm) digits, overflow arrow, and colons to indicate when a count is in process
COUNT: Push-button to initiate scaler count
COUNT TIME: Internally selected times of 0.1, 0.5, 1, or 2 minutes
SELECTOR SWITCH: Toggle switch to select alpha and beta, alpha only, or beta only
HIGH VOLTAGE: Adjustable from 200 - 2000 volts (can be read on meter)
HIGH VOLTAGE ADJUST: Accessible from front of instrument (protective cover provided)
THRESHOLD: Internal control allows adjustment from 2 - 15 mV for beta, and 40 - 700 mV for alpha
WINDOW (Beta only): Internal control allows adjustment from beta threshold up to the alpha threshold setting
OVERLOAD: Senses detector saturation. Indicated by red lamp on meter and meter going to full scale (adjustable depending on detector selected)
RESPONSE: Will vary according to number of counts present. Typically 2 - 11 seconds from 10% to 90% of final reading
POWER: 2 each "D" cell batteries (housed in sealed compartment that is externally accessible)
BATTERY LIFE: Greater than 350 hours with alkaline batteries (battery condition can be checked on meter)
CONSTRUCTION: Cast and drawn aluminum with beige polyurethane enamel paint
TEMPERATURE RANGE: -4° F(-20° C) to 122° F(50° C)
May be certified for operation from -40° F(-40° C) to 150° F(65° C)
SIZE: 6.5"(16.5cm)H X 3.5"(8.9cm)W X 8.5"(21.6cm)L
WEIGHT: 3.5 lbs(1.6kg) including batteries

Ludlum Model 2224 Alpha/Beta Scaler / Ratemeter,
suggested detectors for Alpha/Beta Measurements:
Model 43-1-1
Model 43-2-2
Model 43-20
Model 43-68
Model 43-89
Model 43-93


Common Meter Dial

0-500 cpm


Replacement Parts

Standard Carrying Case
Air and Water Tight Carrying Case

Meter Bezel
Meter Movement
Probe Clip


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