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Radiation Oncology - Radiation Monitoring

Radiation Monitoring Links   
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                     Radiation Monitoring

Ludlum Ion Chamber Survey Meter (Model 9DP)

The Ludlum Model 9DP, Pressurized ion chamber meter, provides highly sensitive measurements of exposure  
and exposure rate. It can simultaneously display the exposure rate and integrated value or the highest rate   seen by the instrument. The integrated value can be reset (if desired) using one of the four convenient frontpanel   mounted buttons.

• 0 to 50 mSv/h (0 to 5 R/hr) Range with μR/hr Sensitivity
• Sunlight Readable Color Display
• Auto Zeroing & Ranging
• Rechargeable Batteries
• Alarming Capability
• Rate, Integrate & Peak Hold Readouts
• Data Logging
• USB Connectivity
• Free Firmware Updates through Internet

Radiation Monitoring in India Ludlum Ion Chamber Survey Meter Electronic Personal Dosimeter Radiation Monitor Electronic Personal Dosimeter Personal Radiation Monitor Model 25


RADIATION DETECTED gamma & X‐rays above 25 keV; beta above 1 MeV
OPERATING RANGES With R/hr units : 0–500 μR/hr, 0–5 mR/hr, 0 –50 mR/hr, 0–500 mR /hr, 0–5 R/hr
With Sv/h units : 0–5 μSv/h, 0–50 μSv/h, 0–500 μSv/h, 0–5 mSv/h, 0–50 mSv/h
CHAMBER VOLUME 230 cm³ (14 in³) volume pressurized to 8 atmospheres (117 psi)
RESPONSE TIME 5 seconds in lowest range, 2 seconds in all other ranges, when measuring from 10% to 90% of
final value
MEASUREMENT READOUTS simultaneous display of rate, integrated reading, and highest rate (peak hold)
LCD DISPLAY 8.9 cm (3.5 in.) diagonal, 240 x 320 (H x W) pixels, TFT active matrix, 262,000 colors, 220 cd/m²
ALARMS two levels of radiation alarms available, each are user programmable
AUTOMATIC FUNCTIONS auto ranging, auto zeroing, auto LCD backlighting
AUDIO OUTPUTS built‐in unimorph speaker, > 60 dB at 0.6 meters (2 ft.)

Model 23-1: Electronic Personal Dosimeter
The Model 23‐1 Electronic Personal Dosimeter (Ludlum) is a solid and lightweight
(55.9 g/2 oz) pen‐type personal dosimeter. It can be used for measuring gamma or X‐ray radiation in medical and laboratory environments or other areas where
personal radiation monitoring is desired or required.
• 600 record data logging option available
• low weight and slim design
• audio alarm
• silicon semiconductor detector
• gamma and X‐ray (35 keV to 3 MeV)                                      

Electronic Personal Dosimeter
Personal Radiation Monitor - Model 25

Personal Radiation Monitor - Model 25

The Model 25 is a conveniently small‐sized device designed to warn users any time they are in a potentially harmful radiation environment. The unit will automatically alarm with a loud audible signal and blinking display when either the dose rate (0.01 mR/hr to 999 R/hr) or accumulated dose (0 to 1999 R) set points are exceeded.