Model 3-97 Survey Meter

  • Internal 1" X 1" NaI(Tl) Gamma Scintillator
  • External Energy Compensated G-M Detector
  • 4 Ranges
  • Total Counting Range from 0 - 200 mR/hr, and 0 - 240,000 cpm


INDICATED USE: Beta-gamma survey
DETECTORS: Controlled by selector switch
INTERNAL: 1" X 1" NaI(Tl) scintillator
SENSITIVITY: Typically 175 cpm/microR/hr ( Cs-137 gamma)
EXTERNAL: Model 44-38 energy compensated G-M detector (others available)
SENSITIVITY: Typically 1200 cpm/mR/hr (Cs-137 gamma)
CONNECTOR: Series "C" (others available)
METER DIAL: 0 - 2 mR/hr, 0 - 2.4k cpm, BAT TEST (others available )
MULTIPLIERS: X0.1, X1, X10, X100
LINEARITY: Reading within plus or minus 10% of true value with detector connected
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 - 1500 volts
THRESHOLD: 30 mV plus or minus 10 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 600 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 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: 9.5"(24.1cm)H X 3.5"(8.9cm)W X 8.5"(21.6cm)L
WEIGHT: 4.4 lbs (2 kg) including batteries and detector

Common Meter Dials

0-2 mR/hr; 0 - 2.4 kcpm

0-6.6k cpm; 0-20




Replacement Parts

Check Source
Scaler Option
Shoulder Strap
Standard Carrying Case
Air and Water Tight Carrying Case

Meter Bezel
Meter Movement




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