Ludlum Model 3-IS Intrinsically Safe Survey Meter

The Ludlum Model 3-IS Intrinsically Safe Survey Meter was designed to be used in environments where explosives are used. These explosive resistant survey meters are often used on constructions sites, oil fields and oil rigs. The Ludlum Model 3-IS Survey Meter is Certified to: UL 913, Class I, II, & III, Division 1 Groups A,B,C,D, CSA C22.2 No.157, UL 61010-1, CSA C22.2 No. 61010-1.


PART#:48-3581  Ludlum Model 3-IS is displayed with Model 44-9 “Pancake” detector, Price of detector not included in Survey Meter price.

INDICATED USE: General purpose survey for normal and hazardous locations
APPROVED DETECTORS: Models 44-2, 44-6, 44-9 and 44-38
METER DIAL: 0 - 2 mR/hr, or 0 - 5k cpm, BAT TEST (others available)
METER: 2.5" (6.4 cm)arc, 1 mA analog type
MULTIPLIERS: X0.1, X1, X10,X100
RANGE: Typically 0-200 mR/hr, or 0-500,000 counts/minute(cpm)
LINEARITY: Reading within 10% of true value with detector connected
SPECIAL CONNECTOR: Locking series "C" (39 inch cable only)
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 400 - 1000 volts
THRESHOLD: Fixed at 40 mV ± 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 Procell PC 1300 "D" cell batteries (housed in sealed compartment that is externally accessible)
BATTERY LIFE: Typically greater than 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 powder-coat
TEMPERATURE RANGE: -4°F(-20°C) to 104°F(40°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

Suggested detectors for Model 3-IS Survey Meter:




For Alpha/beta/gamma Detection

Model 44-9

Model 44-6

Model 44-9

Model 44-38

Model 44-2

Model 44-6

Model 44-9

Model 44-38

Model 44-9

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