8800 Plus TLD Reader

medium_8800plus.jpgThe 8800 Plus reader is controlled through screen dialogues, using the mouse to make selections from the drop-down menus. It can also be networked with Model 4500 and Model 6600 in discrete or shared dosimetry applications. A unique chain-of-custody tracks and maintains records.
  • Measures beta, gamma, X-ray and neutron doses, singly and mixed
  • Card readout of up to 140 cards per hour
  • EXT-RAD and DXT-RAD extremity dosimeters are processed automatically on carrier cards
  • Menu-driven control
  • Element Calibration Coefficients (ECCs), Reader Calibration Factors (RCFs) and card acceptance procedures are controlled by a new automatic QA program
  • Precisely controlled heating profiles offer consistent, repeatable glow curves, suitable for further analysis; precise, highly controlled, highly reliable linear heating by gas produces uniform heating, provides better reproducibility and extends dosimeter life
  • Backward compatibility with TLD-REMS and NETREMS software protects your existing records and enhances user skills
  • Host computer with VGA color monitor
  • Menu-driven control of “expose”, “transport cards”, and “diagnostics”
  • Explicit on-screen messaging for information and error reporting
  • Precise flow of hot gas to the four heater tubes for the TLD dosimeter elements is controlled by four precision flowmeters adjusted and balanced during factory setup
  • High-voltage potentiometers are mounted within the reader, allowing precise adjustment
  • Back panel controls include a keyboard enable/disable switch and connectors for keyboard, mouse, screen, serial port, and parallel printer port
  • Optional 90Sr internal irradiator
  • Optional UPS prevents loss of data during power failures
Model 8800Plus

Standard version, reads Harshaw TLD whole body, neutron and environmental TLD cards and extremity dosimeters on carrier cards. Includes reader, heating system, load and unload cartridges, card transport system, and single barcode reader. TLDREMS and WinREMS software runs on a separate external PC.

Model 8800Plus Option 1

Same as standard model, but includes a triple-head laser barcode scanner for reading EXT-RAD extremity chipstrates.

Model 8800Plus Option 2

Same as standard model, but includes a CCD camera for reading DXT-RAD extremity ringlets, EXT-RAD chipstrates and other standard Harshaw TLD cards.

Specifications for TLD Model 8800 High Capacity Auto System
Operating Modes: Read cards/Calibrate reader/Calibrate cards/Perform daily Quality Assurance procedures/Run WinREMS or WinRemsSQL with an external Windows computer (WinRemsSQL requires an Windows SQL Server 2005 or 2008  instance to be available on the network)
Dynamic Range: Seven decades
Capacity: Up to 1400 TLD cards including calibration cards, seven 200-card capacity cartridges
Throughput, using standard heating profile: TLD cards, 140 per hr.; chipstrates, 140 per hr.; DXT-RAD 140 single element dosimeters per hr.
Card Identification: Codabar barcodes: interlaced 2 of 5, code 39
Linearity: Less than 1% deviation
Stability: Based on one standard deviation of 10 consecutive measurements
Dose, better than 1.0µGy
Reference light, <1%
High-voltage short-term stability, ±0.005%
Warm-up Time: <20 min.
Dark Current: <1µGy 137Cs equivalent dark current
Heating Method: Contactless heated N2
Time/Temperature Profiles:

Preheat temperature, 20° to 200°C
Preheat time, 0 to 300 sec.
Acquisition time, 10 to 300 sec.
Linear temperature ramp, 1 to 50° per sec.
Acquisition temperature, to 300°C (option available to provide up to 400°C)
Post-read anneal temperature, to 300°C (option available to provide up to 400°C)
TTP Reproducibility, ±1°C

Weight: 400 lb. (180kg)
Temperature Ranges: Operating: 15° to 40°C
Storage: -10° to +60°C
Ambient Light Exposure: Up to 1000 lux with cover on
Dosimetry Performance  
Radiations Measured: Photon, energies >1keV
Neutron, from thermal to 100MeV
Beta, energies >70keV
Linear Dose Ranges for Nearly Tissue-Equivalent Materials: With LiF:Mg, Ti: 10µGy (1mrad) to 10Gy (1000 rad)
With LiF:Mg, Cu, P: 1µGy (0.1 mrad) to 20Gy (2000 rad)
Linearity: LiF:Mg, Ti <1%, 100µGy to 1Gy
LiF:Mg, Cu, P <1%, 10UGy to 1Gy
Batch Uniformity: ±30% maximum deviation from the batch mean without application of element correction coefficients
Repeatability: <2% variation based on one standard deviation for 10 sequential dose measurements at 1mGy (100 rad) using 137Cs
Dosimeter Reusability: <10% sensitivity change for 500 readouts (50 for EXT-RAD and DXT-RAD)
Minimum Detectability: Based on 2.26 standard deviations of 10 repeated evaluations of an unexposed dosimeter
LiF:Mg, Ti: <10µGy (1 mrad)
LiF:Mg, Cu, P: <1µGy (0.1 mrad)
Dosimeter Materials: TLD-100: LiF material; Nearly tissue equivalent; 10µGy to 10Gy
TLD-100H: Lif:Mg, Cu, P; Greater sensitivity; 1µGy to 20Gy
TLD-600: LiF; Neutron sensitive; 10µGy to 10Gy
TLD 600H: LiF: Mg, Cu, P; Greater sensitivity; 1µGy to 20Gy
TLD-700: LiF; Neutron insensitive; 10µGy to 10Gy
TLD-700H: LiF: Mg, Cu, P; Greater sensitivity; 1µGy to 20Gy
TLD-500: Al2O3:C; High sensitivity; 0.05µGy to 1Gy
TLD-200: CaF2:Dy; Environmental and high sensitivity; 0.1µGy to 10Gy
TLD-400: CaF2:Mn; Environmental; 0.1µGy to 100Gy
Dimensions and Thickness: Chip Dimensions: 0.125 x 0.125 in. (3.175 x 3.175mm)
Chip Thickness: 0.006 to 0.035 in. (0.15 to 0.9mm)
Circular: 0.12 in. (3.0mm) and 0.14 in. (3.6mm) dia. x 0.01 in. and 0.015 in.