Ludlum Model 78 Stretch Scope

The Model 78 Stretch Scope is useful for high activity gamma survey in difficult-to-reach areas. The meter face is an LED Digital Display with backlight and includes Analog Logorithmic Trend Indicator. Built-In Energy Compensated G-M detectors provide a total counting Range from 0 - 1000 R/hr. The Model 78 is light enough for anyone to use. It Weighs less than 6.5 lbs





PART#: 48-2832

Ludlum Model 78 Stretch Scope Specifications:

INDICATED USE: High activity gamma survey with telescoping detector
WORKING ENVIRONMENT: Splash proof shields for outdoor use
DETECTORS: Two energy compensated G-M tubes
ENERGY RESPONSE: Within plus or minus 15% of true value from 60 keV - 3 MeV
DISPLAY: 4 digit LED display with 0.5"(1.3cm) digits and seperate range indicators, and low battery
000.0 - 9999 with indicators of mR/hr and R/hr
Temporary action 2 position toggle switch to turn backlight on for predetermined time frame or zero meter and display
0 - 1k R/hr 4 decade logorithmic
RANGE SELECTION: A 2 position toggle switch to select between mR/hr, and R/hr
LINEARITY: Reading within plus or minus 10% of true value
AUDIO: Built in click-per-event audio with ON/OFF switch
RESPONSE: Dependant on number of counts present. Typical times FAST 4 - 25seconds, or SLOW 4 - 60seconds from 10% to 90% of final reading
POWER: 2 each "D" cell batteries (housed in sealed handle)
BATTERY LIFE: Typically 250 hours with alkaline batteries (battery failure indicated on display)
METER: 3" (7.6cm) arc, 1 mA analog type
CONSTRUCTION: Aluminum housing with beige polyurethane enamel paint, and polished stainless steel telescope assembly
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: 7"(18 cm)H X 4"(10.1 cm)W X 45"(114 cm)L retracted; 156"( 396.2 cm)L fully extended
WEIGHT: 6.4 lbs(2.9 kg) including batteries

Ludlum Model 78 Stretch Scope Meter Dial

0 - 1K 5 Decade Log


Replacement Parts

Carrying Case

Meter Movement
G-M Tubes

Ludlum Model 78 Stretch Scope Manual


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