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Radiation Therapy Area Monitor, Model 375/2

Radiation Therapy Area Monitor, Model 375/2
Radiation Therapy Area Monitor, Model 375/2
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Radiation Therapy Area Monitor, Model 375/2.


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Radiation Therapy Area Monitor, Model 375/2.

The Model 375/2 Digital Wall-Mount Area Monitor is designed for visibility and ease of use.  This monitor incorporates an internally housed energy compensated GM detector with a dual range digital display from 1µSv/h-10 mS/h (0.1 mR/hr-1 R/hr).  The monitor features audible and visual alarms, low alarm and high alarm indicators, alarm set point adjustability over the entire range, and self diagnostic functions such as low battery, over range, detector saturation and detector failure conditions.  It features a wall-mount chassis and a four-digit LED display that is readable from 30' (9 m) away.  It is designed to operate continuously from an AC power line.  In the event of power failure, the built-in, continuously trickle charged sealed lead acid battery automatically switches in to begin supplying power immediately; assuring interruption-free operation at all times.  The backlit indicators warn of low radiation (yellow), high radiation (red), instrument failure (red), and low battery (yellow), along with an alarm.  A green status light is a positive indication of instrument operation.

• Affordable Area Monitor

• 1µSv/h-10 mS/h (0.1 mR/hr-1 R/hr)

• Integrated Design

• Built-in Rechargeable Backup Battery Backup

• Networkable

• Audio & Visual Alarms and Indicators

• Audible Alarm may be disabled

• 4-Digit LED display

• Alarm level may be preset in 0.1 mR/h increments

A flashing red light with 180° visibility and a red LED indicator next to the digital display provide the visual alarm.  The audible alarm (which may be disabled with a switch) consists of a single short beep at the beginning of the alarm mode.  Optional features include SI units and 220 V operations.

Parameters are protected under a calibration cover.  Calibration is easily accomplished by moving the cal dipswitch to the right, and using the pushbuttons to increment or decrement the calibration constant, dead time correction, and alarm point parameters.  Parameters are stored in non-volatile memory (retained even with power disconnected).  A five-decade logarithmic analog output is provided.  A battery backup provides 48 hours of additional use after the primary power is removed.

With the addition of the optional Remote Alarm, Item 337-105 or 337-106, the Model 375/2 can be used to provide continuous monitoring of (normal) background radiation in radioactive material preparation and work areas (ie.  Nuclear Medicine Hot Labs).  The system can also be used for monitoring of Teletherapy (Cobalt) Treatment rooms, notifying personnel that the source is exposed and in-use.

Indicated Use: General purpose area monitor
Detection Range: 0.1 mR/hr to 999.9 mR/h
Detector: Internally mounted energy compensated GM
Display: Four- digit LED, 0.8" H (2 cm) digits
Alarm: May be preset in 0.1 mR/h (1 µSv) increments
Visual: Red light
Audio: Sonalert, single beep, may be disabled
Data Output: Nine-pin connector providing five-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, 50-60 Hz single phase
Battery: Built-in 6-volt rechargeable battery
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
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 lb (2.9 kg)   


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