Used Ludlum Model 12 Ratemeter.  They are all warranteed to your unconditional satisfaction and are in working order.  They may have scratches or paint spots on them but are in full working order.  IF you need a pristine meter, please let us know as we get them from time to time (priced the same)

• 4 Ranges
• Adjustable High Voltage
• Adjustable Threshold
• Utilizes G-M, Scintillation, or Proportional Detectors
• Built In Audio with ON/OFF Switch
• Total Range from 0 – 500,000 cpm
• Splash Proof

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Model 12 Ratemeter Compatible Detectors: G-M, proportional, scintillation
METER DIAL: 0 – 500 cpm, 0 – 2.5 kV, BAT TEST (others available )
MULTIPLIERS: X1, X10, X100, X1000
LINEARITY: Reading within plus or minus 10% of true value with detector connected
CONNECTOR: Series “C” (others available )
AUDIO: Built in unimorph speaker with ON/OFF switch (greater than 60 dB at 2 feet )
CALIBRATION CONTROLS: Accessible from front of instrument (protective cover provided )
HIGH VOLTAGE: Adjustable from 200 – 2500 volts (can be read on meter )
DISCRIMINATOR: Adjustable from 1 – 100 mV
RESPONSE: Toggle switch for FAST (4 seconds) or SLOW (22 seconds) from 10% to 90% of final reading
RESET: Push-button to zero meter
POWER: 2 each “D” cell batteries (housed in sealed compartment that is externally accessible )
BATTERY LIFE: Typically 2000 hours with alkaline batteries (battery condition can be checked on meter )
METER: 2.5″ (6.4 cm) arc, 1 mA analog type
CONSTRUCTION: Cast and drawn aluminum with beige powdercoat
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″ (16.5 cm)H X 3.5″ (8.9 cm)W X 8.5″ (21.6 cm)L
WEIGHT: 3.5 lbs (1.6 kg) including batteries