General Description
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 front-panel mounted buttons. The stunning 256-color, bit-mapped display provides an optimized presentation of the data and is accompanied with icons informing the user of the active functions and instrument status. All logged data are written in csv format to a plugged-in, industry standard, USB thumb drive for convenient retrieval by a PC spreadsheet or database program. Alarms are manifested using color changes on the display and an acknowledgeable audio output.
Technical Description
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 cc (14 in³ ) volume pressurized to 8 atmospheres (117 psi)
- ACCURACY: +/-10%
- RESPONSE TIME: 5 seconds in lowest range, 2 seconds in all other ranges, when measuring from 10% to 90% of final value
Evaluation Criteria
THROUGHPUT:
- Detection is instantaneous
- Continuous operation with no defined runs
- System is continuous and provides real time analysis with
- no defined tests/samples
- The system or approach is not amenable to full or semi-automation
- Device or system is intended for multiple detection assays
- Less than 5 minutes is required for set-up
- 1-2 steps are required for detection
LOGISTICS:
- Very brief (minutes-hours) training and minimal technical
- skills
- Approximately the size of a toaster
- Between 1 and 5 kg
- System or device uses batteries
- 4-8 hours battery life
OPERATIONS:
- Can be used from -21°C to 41°C
- Performance is not influenced by relative humidity
- 5-10 years expected life
- Results can be viewed in real-time
- The system could easily be adapted into a fully autonomous system
- The system software is closed and not available for modification
- The system hardware is closed and not available for modification
DETECTION:
- Down to background level radiation for dose rate
- Down to background level radiation for count rate
- System is used for surveying