The Model 3004 Neutron Dose Survey Meter combines a handheld digital meter with a 22.9 cm (9.0 in.) diameter REM ball containing a 3He detector to measure and monitor neutron radiation. “i” versions include an internal gamma detector in the meter for exposure or dose measurements (see Configurations for available versions). Each instrument features a large, easy-to-read LCD screen and audible alarms, and is controlled using a simple five-button interface. The meter body is made of high-impact plastic, and splash resistant construction allows the instrument to be used outdoors.
Four modes of operation are available – RATE, MAX, COUNT, and DOSE – which can be selected by pressing the MODE button. Measurements can be collected in two sets of units (primary and secondary) for RATE and MAX modes in cps, cpm, Bq, dpm, mR/hr, mrem/hr, or μSv/h units. The user can switch between two sets of units by pressing the UNITS button. When enabled with the optional Lumic Data Logger Kit (see Options), data can be logged in any of the operational modes using the LOG button on the handle. Up to 1000 data points can be stored internally.
Instrument setup can be done either through the front-panel controls or via the Lumic Calibration Kit (see Options). An internal switch can be used to disable the front-panel setup feature to protect desired settings from inadvertent modification. User-adjustable settings include the calibration constant, dead time correction, efficiency, high voltage, pulse threshold, response time, count time, operational modes (Rate, Max, Count, or Dose), HV current overload level, and minimum and maximum display levels. The user may also set Primary and Secondary units, unit alarm levels, count units, count alarm levels, and zero pulse protection time limit.
The Model 3004 is shipped ready to use with batteries and a calibration certificate.