Ludlum Model 375-10

   Digital Area Radiation Monitor (1 µR/hr - 2000 µR/hr)

Features

• Normally Calibrated to Not See Low-Energy Radioactive Isotopes

• Measures High-Energy Radioactive Isotopes Common to Dirty Bombs

• Internal 2" x 2" Nal(Tl) Radiation Scintillator

• Detection Range from 1 μR/hr to 2000 μR/hr

• Affordable Area Radiation Monitor

• Compact, Integrated Design

• Battery Backup

• Networkable

• Audio and Visual Alarms

• Optional Remote

• Detector Fail Indicator

• Data Output/RS-232

• 10BaseT Ethernet Data Output Capability

• Ethernet Network Software Available

Introduction

The Ludlum Model 375-10 is a digital wall mounted gamma radiation area monitor with an internal shielded 2" x 2" NaI(Tl) radiation detector. The monitor was designed as a cost effective monitor for high volumes of personnel, packages and vehicles for low level radiation detection ( as low as 10 uCi of Cs-137 at four feet). The discriminator can be used to ignore common low energy medical isotopes, but measure high energy isotopes common to dirty bombs. The energy detection range is 25 keV to 3 MeV. Remote displays, strobe lights, horns and relay contacts are optional. An ethernet port is standard for providing outputs for current readings and instrument status. The software option can monitor and log every two seconds and can send an email notification on alarms.  It additionally has a 48 hour battery backup to keep the system operational in the event power is lost. 

Specifications

PART NUMBER: 48-3443

INDICATED USE: Area radiation monitoring - normally calibrated to NOT see low-energy isotopes
RADIATION DETECTOR: Internally mounted 2" x 2" Nal(TI) scintillator. A removable lead shield surrounds the detector providing greater resistance to alarm on low-energy fields

DETECTION RANGE: 1 μR/hr to 2000 μR/hr

DISPLAY: 4 digit LED display with 0.8" (2 cm) digits
DISPLAY RANGE: 000.0 - 9999
DISPLAY UNITS: Can be made to display in μR/hr, mR/hr, R/hr, μSv/hr, mSv/hr, Sv/hr, μrem/hr, mrem/hr, rem/hr, cpm, cps, and others
LINEARITY: Reading within 10% of true value
RESPONSE: Typically 3 seconds from 10% - 90% of final reading
STATUS: Green light, instrument functioning properly
ALARMS:

A. Low Alarm: Yellow light, 1 beep/second audible, selectable range: 0-9999
B. High Alarm: Red light, 4 beeps/second audible, selectable range: 0-9999
C. Detector Fail: Red light, constant audible tome > 68 dB at 2 feet
D. Low Bat: Yellow light, indicates less than 2 hours of battery life remaining
HIGH VOLTAGE: Adjustable from 200 - 2500 volts
THRESHOLD: Adjustable from 2 - 100 mV
DEAD TIME: Adjustable to compensate for dead time of detector and electronics (can be read on display)
OVERLOAD: Senses detector saturation (indicated by display reading “-OL-”)
OVERRANGE: Indicates radiation field being measured has exceeded counting range of instrument (indicated by display reading “– – – –”)
DATA OUTPUT: 9 pin connector providing 5 decade logarithmic output, RS-232 output, signal ground connection, FAIL and ALARM signals (current sink), and direct connection to battery and ground
CALIBRATION CONTROLS: Accessible from front of instrument (protective cover provided)
POWER: 95 - 135 Vac (178 - 240 Vac available), 50-60 Hz single phase. 6 volt sealed lead-acid rechargeable battery (built in)
BATTERY LIFE: Typically 48 hours in non-alarm condition; 12 hours in alarm condition
BATTERY CHARGER: Battery is continuously trickle charged when instrument is connected to line power and turned on

REMOTE (optional): Model 271, Model 272, Model 272D
CONSTRUCTION: Wall mount aluminum housing with ivory powder coat paint
SIZE: 7.4” H x 9.7” W x 2.5” D (18.7 x 24.6 x 6.4 cm)
WEIGHT: 6.5 lbs. (2.3 kg)

CONNECTION: 10Base-T Ethernet included

This Product is CE Certified

Options

Technical Information

• Model 375-10 Data Sheet

• Model 375-10 Manual

• Model 375-10 CE Report

• Model 375 Network Setting Request Form

Other Ludlum Products

• Other Ludlum Products

Ludlum Information

• Ludlum Introduction

• Ludlum Resources

• Ludlum Warranty

• Ludlum Repair and Calibration

• Ludlum Training