Ludlum MODEL 2241-2RK Nuclear Emergency Response Kit

This kit includes a general purpose survey & gross counting meter with G-M and scintillation detectors. A locking toggle switch allows for quick change between two detector setups. Alert/Alarm is indicated by annuciator on display and audible tone. Auto ranging from 0.0 mR/hr - 9999 R/ hr; 0.000 mSv/hr - 9999 Sv/hr; 0 cpm - 999k cpm; or 0 cps - 100k cps. Scaler is activated by push button in handle (count time adustable from 1 - 9999 seconds in 1 second time intervals). Battery life is typically better than 200 hours and scaler alarm is adjustable from 1 - 999999 counts. Dose rate alarm is adjustable at any point corresponding to pre-selected ratemeter range.

Includes Alpha, Beta & Gamma pancake detector. The efficiency (4pi geometery) is typically 5%-14C; 22%-90Sr/90Y; 19%-99Tc; 32%-32P; 15%-239Pu. The sensitivity is typically 3300 cpm/mR/hr (137Cs).

High energy gamma detector for MICRO-R sensitivity. Scintillator is 1” diameter X 1” thick NaI(Tl) crystal. Sensitivity is typically 175,000 cpm/mR/hr (Cs-137).

Model 10362 Case
(Included in kit) Great for emergency vehicles!
The pelicase is an air/water tight foam fitted case. Inside dimensions are 17”L x 11.7”W x 6”D.
Cs-137 Check Source and Holder (Included in kit) This exempt quantity 1 uCi check source and holder is mounted on the side of the instrument and used to check for proper instrument operation in the field.

If special calibration requirements are not initially specified, calibration will be made based on the default settings shown below:

Det#1 Det#2

	Color Dot: Probe model: Units/Timebase: Rate Alarm: Rate Alert: Scaler Alarm: Scaler count time:		Red 44-9 cpm 50 kcpm 20 kcpm 85000 12 sec.	Yellow 44-2 R/hr 50 µR/hr 20 µR/hr 85000 12 sec.

The following parameters are adjusted by removable switchboard. Once initial setup and calibration have been completed the switchboard can be removed without affecting normal operation of the instrument (Model 2241-2 may be ordered without switchboard)

BACKLIGHT "ON" TIME: 5, 30, 60, 90, 180, or 240 seconds for the backlight to stay "ON" when activated.
SET MINIMUM DISPLAY: Allows lower limit of auto-ranging display to be fixed. For example, display can be set to not show values less than 1 R/hr.
RS-232 DATA DUMP MODE: Enables or disables dump mode to RS-232 port. When enabled data will be dumped every 2 seconds
RS-232 DETECTOR SETUP MODE: Allows for detector parameters to be input by RS- 232 port
BAUD RATE: 150, 300, 600, 1200, 2400, 4800, 9600, or 19200 bps.
DEAD TIME: Adjustable from 0 - 9999 seconds
CALIBRATION CONSTANT: Adjustable from 0.001 - 280 X 109 counts/display unit
DISPLAY UNITS: Can read in R/hr, Sv/hr, cpm, or cps
TIME BASE: Can read in seconds or minutes
AUDIO DIVIDE: 1, 10, 100, or 1000 events-per-click
RESPONSE:
FIXED: FAST response time adjustable from approximately 2 - 50 seconds. SLOW response is 5 times fast setting
VARIABLE: Dependent on number of counts present. Typical times FAST - 4 - 25 seconds, SLOW - 4-60 seconds
(All times stated from 10% to 90% of final reading)
RATEMETER ALERT/ALARM: Set at any point corresponding to pre-selected ratemeter range
SCALER ALARM: Adjustable from 1 - 999999 counts
SCALER COUNT TIME: Adjustable from 1 - 9999 seconds

Model 44-9 Pancake Probe

INDICATED USE: Alpha beta gamma survey; Frisking
DETECTOR: Pancake type halogen quenched G-M
WINDOW: 1.7 plus or minus 0.3 mg/cm² mica
WINDOW AREA:
Active - 15 cm²
Open - 12 cm²
EFFICIENCY(4pi geometry): Typically 5%-C-14; 22%-Sr-90/Y-90; 19%-Tc-99; 32%-P-32; 15%-Pu-239
SENSITIVITY: Typically 3300 cpm/mR/hr (Cs-137 gamma )
ENERGY RESPONSE: Energy dependent
DEAD TIME: Typically 80 microseconds
COMPATIBLE INSTRUMENTS: General purpose survey meters, ratemeters, and scalers
OPERATING VOLTAGE: 900 volts
CONNECTOR: Series "C" (others available )
CONSTRUCTION: Aluminum housing 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: 1.8" (4.6 cm)H X 2.7" (6.9 cm)W X 10.7" (27.2 cm)L
WEIGHT: 1 lb (0.5kg)

Model 44-2 Pancake Probe

INDICATED USE: High energy gamma detection
SCINTILLATOR: 1" (2.5 cm) diameter X 1" (2.5 cm) thick sodium iodide (NaI)Tl scintillator
SENSITIVITY: Typically 175 cpm/microR/hr (Cs-137)
COMPATIBLE INSTRUMENTS: General purpose survey meters, ratemeters, and scalers
TUBE: 1.5:(3.8cm) diameter magnetically shielded photomultiplier
OPERATING VOLTAGE: Typically 500 - 1200 volts
DYNODE STRING RESISTANCE: 100 megohm
CONNECTOR: Series "C" (others available )
CONSTRUCTION: Aluminum housing 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: 2" (5.1 cm) diameter X 7.3" (18.5 cm)L
WEIGHT: 1 lb (0.5kg)

Model 2241-2 Display