Harshaw TLD Model 5500 Readers

Get near-tissue equivalent thermoluminescence dosimetry (TLD) performance with a high-capacity reader for all types of TLD elements and health physics applications. The Thermo Scientific™ HARSHAW TLD Model 5500 Automatic Reader provides unattended operation for up to 50 dosimeters and accommodates TL chips, disks, rods and cubes in a broad variety of sizes. This reader is suitable for all kinds of applications that require TLD detectors. Research applications are: radiation measurement verification, total body irradiation dose measurement, and many others where measurement quality assurance is critical.

The HARSHAW TLD Model 5500 Manual Reader includes a carrier disk for up to 50 TL detectors, a linear, programmable contactless nitrogen heating system, and a cooled photomultiplier tube with associated electronics to measure the TL light output. The operational software, Thermo Scientific™ WinREMS™, which runs on a separate computer, provides the user interface, the reader control and the applications software.

• Multiple, programmable, linear heating cycles including pre-read anneal, acquire and post-read anneal cycles.
• Typical cycle time per detector: typically 30 seconds.
• Heating temperature capability up to 400°C.
• Thermoelectric PMT cooler for maximum gain stability.
• Seven decade glow curve acquisition range.
• Options include glow curve deconvolution software (WinGCF Software), various types of neutral density filter to extend the high measurement range, and TL element specific carrier disks for best possible reproducibility.
• Warm-up time: 30 minutes.
• Easy to operate, service and maintain.
• Size: 38 × 46 × 48cm.
• 40kg.

Dosimetry Performance Using LiF:Mg,Ti (TLD-100/600/700):

• Nearly tissue equivalent.
• Radiation types: photons (E>5keV), electrons (E>70keV), neutrons (from thermal energies up to ∽100MeV, TLD-600 only).
• Measurement range: 10 μGy to 1 Gy (linear), 1 Gy to 20 Gy (supralinear).
• Detection threshold: <10 μGy based on 2.26 standard deviations for 10 sequential readings of an unexposed dosimeter.
• Repeatability: Less than 2% variation based on one standard deviation for 10 sequential measurements of 1 mGy ¹³⁷-Cs.
• Residual TL signal: <0.2% of reading.
• Fading: <20% in 3 months without thermal treatment; <5% in 3 months using pre-read anneal or glow curve deconvolution software (WinGCF Software).
• Batch uniformity: ±30% from the factory standard.
• Reuse: typically %500.

Instrument Performance:

• Dynamic range: 7 decades.
• HV stability: ±0.005% per hour, ±0.02% per 8 hours.
• Linearity: better than 1%.
• Test light: temperature-stabilized LED.
• Electrical supply: selectable, 110/120VAC ±10%, 60Hz or 220/240VAC ±10%, 50Hz
• Nitrogen supply:
  Purified (99.995%), dry.
  Pressure: 2.8 to 6.3kg/cm^2.
  Flow Rate: internally regulated to 400 liters/h if specified pressure is provided.
• Operating temperature: 15° to 40°C.
• Storage temperature: -10° to +60°C.
• Humidity: Functions within specification after 24 hour exposure to 90% humidity and subsequent 6-hour recovery with use of the nitrogen supply.
• Ambient light exposure: Functions within specifications when exposed to ambient light up to 1,000 Lux with cover on the reader.
• Shock: Withstands a 1-cm drop onto a concrete surface.

Ordering Alerts:

Computer requirements: Any commercially available PC system with Windows™ 7, XP, 2000, or NT 4. 32 bit OS only. RS232 strongly recommended. (Please contact your sales representative for approved USB to RS232 converters).

Compatible with:

Thermo Scientific TLD Materials, Thermo Scientific TLD Accessories

Recommended for:

Dose verification and research studies, quality assurance, whole body dosimetry, extremity dosimetry, environmental dosimetry, high dose applications (radiation hardness testing), and many more.

The intended use for Harshaw TLD Readers and their associated dosimeters are as follows: The Thermo Scientific Model 5500 Harshaw TLD Reader is a PC-driven, manually operated, tabletop instrument for thermoluminescent dosimetry (TLD) measurement. It economically provides both high performance and high reliability, and it complies with the latest International Standards Organization (ISO) requirements. The 5500 reads one dosimeter per loading and accommodates a variety of TL configurations, including chips, disks, rods, and powder.

These products are not intended for in vitro diagnostic purposes in accordance with our product documentation, manuals, and labels. They are designated for General Laboratory Use Only. Our Products have not been tested or validated for such applications and their use for in vitro diagnostic purposes may result in inaccurate results and, more seriously, health and safety risks. For General Lab Use Only - Not For Diagnostic Procedures.