Model 2401 -S Pocket Survey Meter

DETECTOR: 18 mm diameter CsI scintillation crystal
SENSITIVITY: Typically 120 cpm/microR/hr (Cs-137 gamma)
ENERGY RESPONSE: Energy dependent
METER DIAL: 0 - 50 microR/hr; BAT OK
MULTIPLIERS: X1, X10, X100
LINEARITY: Reading within plus or minus 10% of true value
ALARM: Indicated by red LED and continuous audio (Can be set at any point)
AUDIO: Built in unimorph speaker (select quiet position on main switch to silence the audio)
CALIBRATION CONTROLS: Accessible from front of instrument
RESPONSE: Typically 8 seconds from 10% to 90% of final reading
POWER: 1 ea. 9 volt
BATTERY LIFE: Typically 250 hours with alkaline batteries (battery condition can be checked on meter )
METER: 2.5" (6.4 cm) arc, 1 mA analog type
CONSTRUCTION: Aluminum housing with beige polyurethane enamel paint, and a recessed subsurface printed membrane front panel
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: 1.8" (4.6 cm)H X 3.3" (8.4 cm)W X 5.3" (13.5 cm)L
WEIGHT: 0.9 lbs (0.4 kg) including batteries

 

Ludlum MODEL 2401-S Survey Meter